Author: "Marine Geology" - Searchworks@Jio Institute Digital Library Search Results

Author: Jeffrey Donnelly., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences., Toomey, Michael (Michael Ryan), Jeffrey Donnelly., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences., and Toomey, Michael (Michael Ryan)
Abstract: Thesis: Ph. D., Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2014., Cataloged from PDF version of thesis., Includes bibliographical references., Here I use a simple numerical model of reef profile evolution to show that the present-day morphology of carbonate islands has developed largely in response to late Pleistocene sea level oscillations in addition to variable vertical motion and reef accretion rates. In particular, large amplitude 'ice-house' sea-level variability resulted in long lagoonal depositional hiatuses, producing the morphology characteristic of modern-day barrier reefs. Reactivation of carbonate factories, transport of coarse reef material and rapid infilling of shallow water accommodation space since deglaciation makes these unique sites for reconstructing Holocene climate. Integration of new tropical cyclone reconstructions from both back-barrier reef (central Pacific) and carbonate bank (the Bahamas) settings with existing storm archives suggests a coordinated pattern of cyclone activity across storm basins since the late Holocene. Seesawing of intense tropical cyclone activity between the western Pacific (-0- 1000 yrs BP) and North Atlantic/Central Pacific (~1000 ~2500 yrs BP) appears closely tied with hydrographic patterns in the tropical Pacific and El Niflo-like variability. Decoupling of North Atlantic (inactive) and South Pacific (active) tropical cyclone patterns during the mid-Holocene suggests precession driven changes in storm season insolation may constrain ocean-atmosphere thermal gradients and therefore cyclone potential intensity on orbital timescales., by Michael Toomey., Ph. D.
Published: 2014

60. The CAFE experiment : a joint seismic and MT investigation of the Cascadia subduction system

Author: Rob L. Evans., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences., McGary, R. Shane, Rob L. Evans., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences., and McGary, R. Shane
Abstract: Thesis (Ph. D. in Geophysics)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2013., Page 176 blank. Cataloged from PDF version of thesis., Includes bibliographical references., In this thesis we present results from inversion of data using dense arrays of collocated seismic and magnetotelluric stations located in the Cascadia subduction zone region of central Washington. In the migrated seismic section, we clearly image the top of the slab and oceanic Moho, as well as a velocity increase corresponding to the eclogitization of the hydrated upper crust. A deeper velocity increase is interpreted as the eclogitization of metastable gabbros, assisted by fluids released from the dehydration of upper mantle chlorite. A low velocity feature interpreted as a fluid/melt phase is present above this transition. The serpentinized wedge and continental Moho are also imaged. The magnetotelluric image further constrains the fluid/melt features, showing a rising conductive feature that forms a column up to a conductor indicative of a magma chamber feeding Mt. Rainier. This feature also explains the disruption of the continental Moho found in the migrated image. Exploration of the assumption of smoothness implicit in the standard MT inversion provides tools that enable us to generate a more accurate MT model. This final MT model clearly demonstrates the link between slab derived fluids/melting and the Mt. Rainier magma chamber., by R. Shane McGary., Ph.D.in Geophysics
Published: 2013

61. Determining timescales of natural carbonation of peridotite in the Samail Ophiolite, Sultanate of Oman

Author: Susan E. Humphris and Kenneth W. W. Sims., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Mervine, Evelyn Martinique, Susan E. Humphris and Kenneth W. W. Sims., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., and Mervine, Evelyn Martinique
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2012., Cataloged from PDF version of thesis., Includes bibliographical references., Determining timescales of the formation and preservation of carbonate alteration products in mantle peridotite is important in order to better understand the role of this potentially important sink in the global carbon cycle and also to evaluate the feasibility of using artificially-enhanced, in situ formation of carbonates in peridotite to mitigate the buildup of anthropogenic CO₂ emissions in the atmosphere. Timescales of natural carbonation of peridotite were investigated in the mantle layer of the Samail Ophiolite, Sultanate of Oman. Rates of ongoing, low-temperature CO₂ uptake were estimated through ¹⁴C and ²³⁰Th dating of carbonate alteration products. Approximately 1-3 x 10⁶ kg CO₂/yr is sequestered in Ca-rich surface travertines and approximately 10⁷ kg CO₂/yr is sequestered in Mg-rich carbonate veins. Rates of CO₂ removal were estimated through calculation of maximum erosion rates from cosmogenic 3He measurements in partially-serpentinized peridotite bedrock associated with carbonate alteration products. Maximum erosion rates for serpentinized peridotite bedrock are ~5 to 180 m/Myr (average: ~40 m/Myr), which removes at most 10⁵-10⁶ kg CO₂/yr through erosion of Mg-rich carbonate veins., by Evelyn Martinique Mervine., Ph.D.
Published: 2013

62. Syn-eruptive degassing of a single submarine lava flow : constraints on MORB CO₂ variability, vesiculation, and eruption dynamics

Author: S. Adam Soule, Alison Shaw and Frederick Frey., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Nakata, Dorene Samantha, S. Adam Soule, Alison Shaw and Frederick Frey., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., and Nakata, Dorene Samantha
Abstract: Thesis (S.M.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2010., Cataloged from PDF version of thesis., Includes bibliographical references (p. 33-37)., Mid-ocean ridge basalts (MORBs) exhibit a wide range of CO2 concentrations, reflecting saturation to supersaturation (and rarely undersaturation) relative to their emplacement depths. In this study, we explore the mechanisms of CO2 degassing and the implications this has for estimating the advance rates and durations of seafloor eruptions. We present dissolved volatile concentrations (mainly of CO 2 and H20) and vesicle size distributions (VSDs) for a unique suite of MORB glasses collected at the East Pacific Rise, ~9° 50' N. These MORB glasses were collected at -200 m intervals along an across-axis track over a single flow pathway within the recently emplaced 2005-06 eruption boundaries; systematic sample collection provides one of the first opportunities to characterize intra-flow geochemical and physical evolution during a single eruption at a fast-spreading ridge. Compared to measurements of MORB volatiles globally, dissolved H20 concentrations are relatively uniform (0.10 - 0.16 weight percent), whereas dissolved CO2 contents exhibit a range of concentrations (154 - 278 ppm) and decrease with distance from the EPR axis (i.e., eruptive vent). Ion microprobe analysis of dissolved volatiles within the MORB glasses suggest that the magma erupted supersaturated (pressure equilibrium with 920 - 1224 mbsf) and in near-equilibrium with the melt lens of the axial magma chamber (~1250 - 1500 mbsf), and degassed to near equilibrium (299 - 447 mbsf) with seafloor depths over the length of the flow. The decrease in CO 2 concentrations spans nearly the full range of dissolved CO2 contents observed at the EPR and shows that the varying degrees of volatile saturation that have been observed in other MORB sample suites may be explained by degassing during emplacement. Vesicularity (0.1 - 1.2%) increases with decreasing dissolved CO2 concentrations. We use vesicle size distributions (VSDs)-vesicle sizes and number densities-to quantify the physical evolution of the CO2 degassing, by Dorene Samantha Nakata., S.M.
Published: 2012

63. Investigation of the effect of a circular patch of vegetation on turbulence generation and sediment deposition using four case studies

Author: Heidi M. Nepf., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering., Ortiz, Alejandra C, Heidi M. Nepf., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering., and Ortiz, Alejandra C
Abstract: Thesis (S.M.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and the Woods Hole Oceanographic Institution), 2012., Cataloged from PDF version of thesis., Includes bibliographical references (p. 77-79)., This study describes the spatial distribution of sediment deposition in the wake of a circular patch of model vegetation and the effect of the patch on turbulence and mean flow. Two difference types pf vegetation were used along with two different stem densities totaling four different case studies. The spatial location of enhanced deposition correlated with the steady wake zone, which has length, L1. The steady wake zone only occurred downstream of the rigid emergent patches of vegetation and was not seen downstream of the flexible submerged patches of vegetation. The enhanced deposition occurred when both turbulence and mean velocity was below the upstream, initial values. The enhanced deposition occurred when the mean velocity was less than or equal to half of the initial velocity. For the four cases studied, theses parameters of low velocity and low turbulence were primarily met within the steady wake region immediately downstram of the two rigid emergent patches of vegetation. In all four cases, large coherent structures are created in the flow due to the patch. Lateral vortices are formed downstream of the patch in a von-Karman vortex street that meets at the center of the flow a distance, Lw, downstream of the patch. For the flexible submerged cases, streamlines reattach to the bed of the flume a distance, Lv, downstream of the patch. In addition, for the flexible submerged cases, a secondary circulation is generated with flow moving laterally away from the patch at the surface and toward the centerline of the patch at the bed., by Alejandra C. Ortiz., S.M.
Published: 2012

64. A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters

Author: Daniel C. McCorkle., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Gramling, Carolyn M, Daniel C. McCorkle., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., and Gramling, Carolyn M
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), September 2003., Includes bibliographical references., Groundwater discharge into estuaries and the coastal ocean is an important mechanism for the transport of dissolved chemical species to coastal waters. Because many dissolved species are present in groundwater in concentrations that are orders of magnitude higher than typical river concentrations, groundwater-borne nutrients and pollutants can have a substantial impact on the chemistry and biology of estuaries and the coastal ocean. However, direct fluxes of groundwater into the coastal ocean (submarine groundwater discharge, or SGD) can be difficult to quantify. Geochemical tracers of groundwater discharge can reflect the cumulative SGD flux from numerous small, widely dispersed, and perhaps ephemeral sources such as springs, seeps, and diffuse discharge. The natural radiocarbon content (A14C) of dissolved inorganic carbon (DIC) was developed as a tracer of fresh, terrestrially driven fluxes from confined aquifers. This A14C method was tested during five sampling periods from November 1999 to April 2002 in two small estuaries in southeastern North Carolina. In coastal North Carolina, fresh water artesian discharge is characterized by a low A14C signature acquired from the carbonate aquifer rock. Mixing models were used to evaluate the inputs from potential sources of DIC-A'4C to each estuary, including seawater, springs, fresh water stream inputs, and salt marsh respiration DIC additions. These calculations showed that artesian discharge dominated the total fresh water input to these estuaries during nearly all sampling periods., (cont.) These new A14C-based SGD estimates were compared with groundwater flux estimates derived from radium isotopes and from radon-222. It is clear that these tracers reflect different components of the total SGD. The fluxes of low-A14C and of 222Rn were dominated by artesian discharge. Estuarine 226Ra showed strong artesian influence, but also reflected the salt water SGD processes that controlled the other three radium isotopes. The flux of 228Ra seemed to reflect seepage from the terrestrial surficial aquifer as well as salt water recirculation through estuarine sediments. The fluxes of 224Ra and 223Ra were dominated by salt water recirculation through salt marsh sediments. This multi-tracer approach provides a comprehensive assessment of the various components contributing to the total SGD., by Carolyn M. Gramling., Ph.D.
Published: 2012

65. The marine biogeochemistry of molybdenum

Author: Gregory E. Ravizza., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Tuit, Caroline Beth, 1973, Gregory E. Ravizza., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., and Tuit, Caroline Beth, 1973
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, and the Woods Hole Oceanographic Institution), 2003., Includes bibliographical references., Prevailing wisdom holds that the vertical distribution of molybdenum (Mo) in the open ocean is conservative, despite Mo's important biological role and association with Mn oxides and anoxic sediments. Mo is used in both nitrogenase, the enzyme responsible for N2 fixation, and nitrate reductase, which catalyzes assimilatory and dissimilatory nitrate reduction. Laboratory culture work on two N2 fixing marine cyanobacteria, Trichodesmium and Crocosphaera, and a marine facultative denitrifier, Marinobacter hydrocarbanoclasticus, showed that Mo cell quotas in these organisms were positively correlated with Mo-containing enzyme activity. Mo concentrations in Crocosphaera dropped almost to blank levels when not fixing N2 suggesting daily synthesis and destruction of the entire nitrogenase enzyme and release of Mo. Trichodesmium cultures, however, retained a pool of cellular Mo even when not fixing N2. Colonies of Trichodesmium collected in the field have Mo:C tenfold higher than seen in culture, these Mo:C ratios were reflected in SPM samples from the same region. Fe:C ratios for Trichodesmium were between 12-160 pmol:mol in field and culured samples. The Fe:C ratio of Crocosphaera was established to be 15.8 =/+ 11.3 under N2 fixing conditions. Mo cellular concentrations in cultured organisms were too small to significantly influence dissolved Mo distributions, but may slightly affect Suspended Particulate Matter (SPM) distributions. Mean SPM Mo:C ratios were slightly elevated in regions of N2 fixation and denitrification.. A high precision (=/+ 0.5%) isotope dilution ICP-MS method for measuring Mo was developed to re-evaluate the marine distribution of Mo in the dissolved and particulate phase., (cont.) Mn oxides were not found to significantly influence either the dissolved or SPM Mo distribution. Dissolved Mo profiles from the Sargasso and Arabian Sea were conservative. However, dissolved Mo profiles from the Eastern Tropical Pacific showed both depletion and enrichment of dissolved Mo possibly associated with interaction of Mo with coastal sediments. Dissolved Mo profiles in several California Borderland Basins showed 1-2 nM Mo depletions below sill depth. A more focused study of water column response to sediment fluxes using the high precision Mo analyses is necessary to determine whether these phenomena are related., by Caroline Beth Tuit., Ph.D.
Published: 2010

66. The effect of a shallow low viscosity zone on mantle convection and its expression at the surface of the earth

Author: Barry Parsons.These calculations also predict an asymptotic heat flow on old ocean floor which is higher than the plate model and between 50 and 55 mW/m2 . This value agrees with measurements of heat flow on old seafloor in the Atlantic. In conclusion, we prefer an approximate model for the viscosity structure of the upper mantle which initially has a 125 km thick low viscosity zone that represents a viscosity contrast of two orders of magnitude. The viscosity contrast decreases as the plate ages to one order of magnitude or less by 130 m.y., and the low viscosity zone may also thicken with age. Finally, the Rayleigh number of the upper mantle is at least 105 and may be as large as 107 . With this model, the evolution of the surface plates would initially involve small scale convection which is driven by shear coupling to instabilities downstream and to small scale convection associated with fracture zones. This convective flow would begin at close to 5 m.y. and remain confined to the low viscosity zone until nearly 40 m.y.. As this convective flow cools the upper mantle beneath the low viscosity zone, longer wavelength convection begins throughout the upper (or whole) mantle, and the heat transport from the longer wavelength convection flattens the depth-age curve and may form swells., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Robinson, Elizabeth M, Barry Parsons.These calculations also predict an asymptotic heat flow on old ocean floor which is higher than the plate model and between 50 and 55 mW/m2 . This value agrees with measurements of heat flow on old seafloor in the Atlantic. In conclusion, we prefer an approximate model for the viscosity structure of the upper mantle which initially has a 125 km thick low viscosity zone that represents a viscosity contrast of two orders of magnitude. The viscosity contrast decreases as the plate ages to one order of magnitude or less by 130 m.y., and the low viscosity zone may also thicken with age. Finally, the Rayleigh number of the upper mantle is at least 105 and may be as large as 107 . With this model, the evolution of the surface plates would initially involve small scale convection which is driven by shear coupling to instabilities downstream and to small scale convection associated with fracture zones. This convective flow would begin at close to 5 m.y. and remain confined to the low viscosity zone until nearly 40 m.y.. As this convective flow cools the upper mantle beneath the low viscosity zone, longer wavelength convection begins throughout the upper (or whole) mantle, and the heat transport from the longer wavelength convection flattens the depth-age curve and may form swells., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., and Robinson, Elizabeth M
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 1987., Includes bibliographical references (v.2, leaves 309-317)., Many features of the oceanic plates cannot be explained by conductive cooling with age. A number of these anomalies require additional convective thermal sources at depths below the plate: mid-plate swells, the evolution of fracture zones, the mean depth and heat flow relationships with age and the observation of small scale (150-250 km) geoid and topography anomalies in the Central Pacific and Indian oceans. Convective models are presented of the formation and evolution of these features. In particular, the effect of a shallow low viscosity layer in the uppermost mantle on mantle flow and its geoid, topography, gravity and heat flow expression is explored. A simple numerical model is employed of convection in a fluid which has a low viscosity layer lying between a rigid bed and a constant viscosity region. Finite element calculations have been used to determine the effects of (1) the viscosity contrast between the two fluid layers, (2) the thickness of the low viscosity zone, (3) the thickness of the conducting lid, and (4) the Rayleigh number of the fluid based on the viscosity of the lower layer. A model simple for mid-plate swells is that they are the surface expression of a convection cell driven by a heat flux from below. The low viscosity zone causes the top boundary layer of the convection cell to thin and, at high viscosity contrasts and Rayleigh numbers, it can cause the boundary layer to go unstable. The low viscosity zone also mitigates the transmission of normal stress to the conducting lid so that the topography and geoid anomalies decrease. The geoid anomaly decreases faster than the topography anomaly, however, so that the depth of compensation can appear to be well within the conducting lid. Because the boundary layer is thinned, the elastic plate thickness also decreases and, since the low viscosity allows the fluid to flow faster in the top layer, the uplift time decreases as well. We have compared the results of this modeling to data at the Hawai, by Elizabeth M. Robinson., Ph.D.
Published: 2010

67. Basalt petrogenesis beneath slow- and ultraslow-spreading Arctic mid-ocean ridges

Author: Kenneth W. W. Sims., Woods Hole Oceanographic Institution., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Joint Program in Marine Geology and Geophysics., Elkins, Lynne J, Kenneth W. W. Sims., Woods Hole Oceanographic Institution., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Joint Program in Marine Geology and Geophysics., and Elkins, Lynne J
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2009., Includes bibliographical references., To explore the ability of melting mafic lithologies to produce alkaline ocean-island basalts (OIB), an experimental study was carried out measuring clinopyroxene (Cpx)melt and garnet (Gt)-melt partition coefficients during silica-poor garnet pyroxenite melting for a suite of trace elements, including U and Th, at 2.5GPa and 1420-1450°C. Partition coefficients range from 0.0083+0.0006 to 0.020+0.002 for Th and 0.0094+0.0006 to 0.024+0.002 for U in Cpx, and are 0.0032+0.0004 for Th and 0.013+0.002 for U in Gt. Forward-melting calculations using these experimental results to model time-dependent uranium-series isotopes do not support the presence of a fixed quantity of garnet pyroxenite in the source of OIB. To use U-series isotopes to further constrain mantle heterogeneity and the timing and nature of melting and melt transport processes, U-Th-Pa-Ra disequilibria, radiogenic isotopes, and trace-element compositions were measured for the slow-spreading Arctic mid-ocean ridges (MOR). A focused case study of 33 young (<10ka) MOR basalts (MORB) from the shallow endmember of the global ridge system, the Kolbeinsey Ridge (67°05'-70°26'N) found that unaltered Kolbeinsey MORB have universally high (230Th/238U) (1.165-1.296) and relatively uniform (230Th/232Th) (1.196-1.324), ENd (8.4310.49), 87Sr/86Sr (0.70274-0.70301), EHf(16.59-19.56), and Pb isotopes (e.g. 208Pb/206Pb 2.043-2.095). This suggests a homogeneous mantle source and a long peridotite melting column produces the thick Kolbeinsey crust. Trace element ratios suggest a young, depleted mantle source. Data from the slow- to ultraslow Mohns and Knipovich Ridges north of Kolbeinsey form a sloped array, and (230Th/232Th) correlates systematically with radiogenic isotopic variations., (cont.) These data are readily reproduced by models for heterogeneous mantle melting. MORB from 85oE on the global ultraslow-spreading endmember Gakkel Ridge are homogeneously depleted with low (230Th/238U) and high (226Ra/230Th) that lie along a global negative correlation. Arctic data support a global mantle temperature control on mean (230Th/238U)., by Lynne J. Elkins., Ph.D.
Published: 2010

68. Center for Southeastern Tropical Advanced Remote Sensing (CSTARS)

Author: MIAMI UNIV FL DIVISION OF MARINE GEOLOGY AND GEOPHYSICS, Graber, Hans C., Dixon, Timothy H., Evans, Robert H., MIAMI UNIV FL DIVISION OF MARINE GEOLOGY AND GEOPHYSICS, Graber, Hans C., Dixon, Timothy H., and Evans, Robert H.
Abstract: We wish to establish a high capability satellite data reception and analysis facility for environmental monitoring in the southeastern US, Gulf of Mexico, Caribbean Basin and Equatorial Atlantic. CSTARS will provide a variety of satellite data and support for scientific research in land, atmosphere, ice and ocean sciences, as well as applied applications in the fields of environmental monitoring, natural hazard assessment, civil defense and defense tactical applications. To achieve these goals we are developing a high capability receiving and analysis facility for X-band satellite data with a subsequent enhanced capability that would include lower frequency L- and S-band reception. Key priorities in the system design will be high reliability data reception to low elevation angles and rapid data access for all scientific, civilian and defense tactical users. The specific scientific objectives of this proposed project are, but not limited to air-sea interaction and ocean dynamics: 1) To explore the further use of SAR imagery for retrieval of high-resolution synoptic wind fields with special emphasis on tropical storms. 2) To examine the surface roughness, wave breaking and directional distribution of the wave field in tropical and extra-tropical storm systems. 3) To explore and quantify mesoscale flow patterns in synoptic and tropical lows. 4) To study in more detail the morphology of hurricanes especially when coupled with information about cloud patterns and precipitation from other sensors. 5) To develop algorithms for improved detection of ships and their location, size and type as well as speed and direction characteristics. 6) To examine ocean features such as fronts, currents and eddies and combine with measurements of long-range shore-based high-frequency Doppler radars.
Published: 2009

69. Analysis of Results from Large-Scale Wave-Current Laboratory Experiments

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Lacy, Jessica R., Rubin, David M., GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Lacy, Jessica R., and Rubin, David M.
Abstract: The long-term goals are to explain the evolution, dynamics, and morphology of bedforms found in sandy inner-shelf environments, using laboratory and field observations and numerical modeling. Our objective is to analyze existing laboratory data including measured suspended sediment profiles and ripple wavelengths during ripple evolution, and observations of bedform migration, and to use the results to support calibration of a Large Eddy Simulation of ripple evolution under development by Fringer and Chou at Stanford University. Specifically, we aim to: Analyze the relationship between time-averaged suspended sediment profiles and bedform dimensions, wave energy, and current speed; Compare results to existing analytical models, and develop new parameterization of these relationships if merited; Analyze bedform migration and bedload transport from flume experiment sonar data, and relate to flow conditions and Provide data sets and analytical results to Fringer and Chou for model testing.
Published: 2009

70. Geochemical and rheological constraints on the dynamics of the oceanic upper mantle

Author: Nobumichi Shimizu, Gregory Hirth and Henry J.B. Dick., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Warren, Jessica Mendelsohn, Nobumichi Shimizu, Gregory Hirth and Henry J.B. Dick., Woods Hole Oceanographic Institution., Joint Program in Marine Geology and Geophysics., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., and Warren, Jessica Mendelsohn
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2007., This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections., Includes bibliographical references., I provide constraints on mantle convection through observations of the rheology and composition of the oceanic upper mantle. Convection cannot be directly observed, yet is a fundamental part of the plate tectonic cycle. Relative motion among plates is accommodated by localized deformation at their boundaries. I demonstrate that in the ductile regime, strain localization occurs when different mineral phases are mixed together, limiting grain annealing. Upper mantle flow is by dislocation creep, resulting in seismic anisotropy due to mineral alignment. I use a shear zone in the Josephine Peridotite to quantify the relationship between mineral orientation and shear strain, providing an improved framework for the interpretation of seismic anisotropy. The upper mantle is generally assumed to be homogeneous in composition. From detailed isotopic and chemical analyses of abyssal peridotites from the Southwest Indian Ridge, I show that the mantle is heterogeneous at a range of length-scales. Abyssal peridotites recovered at ocean ridges are generally interpreted as the depleted residues of melt extraction. I find that melt-rock reaction is a significant part of the melt extraction process, modifying the composition of the lithospheric mantle. The generation of heterogeneous lithosphere provides a source for asthenospheric heterogeneity, via subduction and mantle convection., by Jessica Mendelsohn Warren., Ph.D.
Published: 2009

71. Seismic and gravitational studies of melting in the mantle's thermal boundary layers

Author: Jian Lin, Robert S. Detrick, Jr., and Stéphane Rondenay., Woods Hole Oceanographic Institution., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Joint Program in Marine Geology and Geophysics., Van Ark, Emily M, Jian Lin, Robert S. Detrick, Jr., and Stéphane Rondenay., Woods Hole Oceanographic Institution., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Joint Program in Marine Geology and Geophysics., and Van Ark, Emily M
Abstract: Thesis (Ph. D.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2007., This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections., Includes bibliographical references (p. 167-196)., This thesis presents three studies which apply geophysical tools to the task of better understanding mantle melting phenomena at the upper and lower boundaries of the mantle. The first study uses seafloor bathymetry and small variations in the gravitational acceleration over the Hawaii-Emperor seamount chain to constrain the changes in the igneous production of the hot spot melting in the mantle which has created these structures over the past 80 My. The second study uses multichannel seismic reflection data to constrain the location and depth of axial magma chambers at the Endeavour Segment of the Juan de Fuca spreading ridge, and then correlates these magma chamber locations with features of the hydrothermal heat extraction system in the upper crust such as microseismicity caused by thermal cracking and high temperature hydrothermal vent systems observed on the seafloor. The third study uses two-dimensional global pseudospectral seismic wave propagation modeling to characterize the sensitivity of the SPdKS seismic phase to two-dimensional, finite-width ultra-low velocity zones (ULVZs) at the core-mantle boundary. Together these three studies highlight the dynamic complexities of melting in the mantle while offering new tools to understand that complexity., by Emily Mary Van Ark., Ph.D.
Published: 2008

72. Plagioclase preferred orientation in the layered mylonites : evaluation of flow laws for the lower crust

Author: Greg Hirth., Woods Hole Oceanographic Institution., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Joint Program in Marine Geology and Geophysics., Mehl, Luc, Greg Hirth., Woods Hole Oceanographic Institution., Massachusetts Institute of Technology. Dept. of Earth, Atmospheric, and Planetary Sciences., Joint Program in Marine Geology and Geophysics., and Mehl, Luc
Abstract: Thesis (S.M.)--Joint Program in Marine Geology and Geophysics (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2008., Includes bibliographical references (p. 30-37)., We evaluate the applicability of plagioclase and gabbro flow laws by comparing predicted and observed deformation mechanisms in gabbroic shear zones. Gabbros and layered gabbro mylonites were collected from the Southwest Indian Ridge (SWIR), ODP Hole 735B. Deformation temperatures are constrained by two-pyroxene thermometry, stress is estimated from grain size, and deformation mechanisms are analyzed by microstructure and the presence or absence of a lattice preferred orientation (LPO). Our analyses indicate that mylonite layers deformed at a strain rate in the range of 1012 to 101 s-1, while coarse-grained gabbro deformed at a strain rate of approximately 10-14 to 1013 s-1. Plagioclase in pure plagioclase mylonite layers exhibit strong LPOs indicating they deform by dislocation creep. Plagioclase grain size in mixed plagioclase-pyroxene mylonite layers is finer than in pure plagioclase layers, and depends on the size and proportion of pyroxenes. Progressive mixing of pyroxene and plagioclase within gabbro mylonite layers is accompanied by weakening of the LPO indicating that phase mixing promotes a transition to diffusion creep processes that involve grain boundary sliding. Our results indicate that experimental flow laws are accurate at geologic strain rates, although the strain rate for diffusion creep of fine-grained gabbro may be underestimated. At the conditions estimated for the SWIR crust, our calculations suggest that strain localization leads to a factor of two to four decrease in lower crustal viscosity. Even so, the viscosity of lower gabbroic crust is predicted to be similar to that of dry upper mantle., by Luc Mehl., S.M.
Published: 2008

73. Sand Ripple Dynamics on the Inner Shelf

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Hanes, Daniel M., Rubin, David M., Lacy, Jessica R., GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Hanes, Daniel M., Rubin, David M., and Lacy, Jessica R.
Abstract: To explain the genesis, dynamics, morphology, and evolution of bedforms found in sandy inner-shelf environments, with emphasis on those bedforms that affect the penetration of sound into the seabed. We seek to improve our understanding of the relationships between hydrodynamics and sediment motion near the seabed, as well as develop models for nearshore sediment transport derived from our understanding of the relevant physical processes. This requires coupling between hydrodynamic forcing, bedform response and feedback, bedload sediment transport response, and the suspended sediment response.
Published: 2006

74. Morphology and Internal Geometry and Stratification of Highstand and Transgressive Deposits: Comparison and Contrast, Gulf of Lions and Central Adriatic Sea

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Field, Michael E., Grossman, Eric G., GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Field, Michael E., and Grossman, Eric G.
Abstract: The long-term goal of our research is to improve our understanding of how marine sedimentary strata accumulate and how they combine to form characteristic stratigraphic sequences, such as drapes, aprons, wedges, sigmoids, and other well-recognized geometrical patterns. Recognizing diagnostic sediment geometries, as represented by acoustic reflectors in the upper 50 m of the shoreface, continental shelf and continental slope is critical to interpreting the evolution of sedimentary strata and sequences and inferring the mechanisms of sediment transport and deposition. Interpreting the signatures of various processes in near-surface deposits provides a critical link between knowledge gained from measuring physical processes that are dominant over time spans from the duration of a single event to several years, and those inferred from interpretations of entire stratigraphic sequences on continental margins that may represent much longer (centuries to millennia) periods of deposition. We were funded by ONR to participate in the US-European planning and research studies for the stratigraphy component of EuroSTRATAFORM. This included active participation and leadership in collaborative workshops and conduct of studies of shallow stratigraphy in the Gulf of Lions. The objective of our field research was to identify the character and origin of sediment bodies on the continental shelf surrounding and within the Cap de Creus Canyon. Overall, our study emphasizes the internal architecture and evolutionary growth of geologically young shelf and nearshore sediment bodies. EuroSTRATAFORM is a North American-European research program to observe, measure and model the processes-from long-term climatic cycles to short-term storm events--that erode, transport, and deposit sediment on continental margins. The study emphasizes the processes and events that create and destroy sedimentary strata over time scales ranging from weeks to millennia.
Published: 2006

75. Sand Ripple Dynamics on the Inner Shelf

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Slinn, Donald N, Hanes, Daniel, Rubin, David, GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Slinn, Donald N, Hanes, Daniel, and Rubin, David
Abstract: The goals of this work are to develop better understanding and predictive capability for the development and evolution of sand ripples in coastal oceans. We are developing two coupled hydrodynamic sediment transport, live-bed models for sand ripple evolution. These models simulate the response of the sea-bed under oscillatory and wave-current induced boundary layer flows., Prepared in collaboration with the Department of Civil and Coastal Engineering, University of Florida, Gainesville. The original document contains color images.
Published: 2005

76. Parameterization of a Two-Phase Sheet Flow Model and Application to Nearshore Morphology

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Kirby, James T, Hsu, Tian-Jian, Elgar, Steve, Hanes, Daniel M, GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Kirby, James T, Hsu, Tian-Jian, Elgar, Steve, and Hanes, Daniel M
Abstract: The overall objective is to develop and test with laboratory and field observations a model that predicts sediment transport and morphological change in the nearshore for a range of wave conditions and sediment characteristics. The specific objectives of this project are to: 1. parameterize the wave-induced bottom stress and sediment transport rate using a two-phase sheet flow model 2. couple the sediment transport model with a time-domain Boussinesq hydrodynamic model to predict beach profile evolution 3. improve the two-phase sheet flow model by comparing its predictions with laboratory and field observations of sediment transport., Prepared in collaboration with Applied Ocean Physics and Engineering Dept at Woods Hole Oceanographic Institution, MA and the Center for Applied Coastal Research University of Delaware, Newark. The original document contains color images.
Published: 2005

77. Sand Ripple Dynamics on the Inner Shelf

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Hanes, Daniel M, Rubin, David M, Slinn, Donald N, GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Hanes, Daniel M, Rubin, David M, and Slinn, Donald N
Abstract: The long-term goal is the prediction of bedforms in coastal regions. The objective is to comprehensively investigate the genesis, dynamics, morphology, and evolution of bedforms found in sandy inner-shelf environments, with emphasis on those bedforms that affect the penetration of sound into the seabed. We will utilize a combination of field observations, laboratory experiments, and numerical modeling to determine the relationships between ripple morphology, wave and current conditions, and sediment characteristics., Prepared in collaboration with the Department of Civil and Coastal Engineering, University of Florida, Gainesville.
Published: 2004

78. Improved Information Systems for Mine Burial Prediction

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Jenkins, Chris, Short, Andrew, Field, Michael, GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Jenkins, Chris, Short, Andrew, and Field, Michael
Abstract: The long-term goal is to improve the quality, availability and reliability of seabed information for modellers, decision makers, and units operating at sea. That information includes data on seabed firmness, mobility, composition. The objectives are: (i) Improve the delivery of data on the character of the seabed for use in mine burial prediction, and other naval and scientific endeavours. Particularly, to improve techniques of mapping in the spatially and temporally complicated coastal zone, preferably using unsupervised techniques. (ii) Improve the delivery of indexes of the reliability for seabed data, with development of appropriate visualizations of uncertainties., Prepared in collaboration with INSTAAR, University of Colorado, Boulder, and the Coastal Studies Unit, University of Sydney, Australia.
Published: 2004

79. Budgeting Postglacial Sedimentation History on the Santa Cruz, California Mid-Continental Shelf

Author: GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Grossman, E. E., Eittreim, S. L., Hanes, D. M., Field, M. E., Edwards, B. D., Fallon, S. J., Anima, R. J., GEOLOGICAL SURVEY SANTA CRUZ CA COASTAL AND MARINE GEOLOGY, Grossman, E. E., Eittreim, S. L., Hanes, D. M., Field, M. E., Edwards, B. D., Fallon, S. J., and Anima, R. J.
Abstract: High-resolution seismic reflection profiling and surface texture mapping of the central California continental shelf, reveal a prominent subsurface reflector interpreted as a low stand erosion surface and an overlying mudbelt that covers 421 km2 of the mid-shelf in depths of 40-90 m. Radiometric and sedimentologic analyses of samples from vibracores taken along the seaward edge of the mudbelt show that initial deposition above the pre-Holocene erosion surface began ca. 14.5 ka. These data and model results of sea-level history, tectonics, and the Monterey Bay littoral sediment budget support the notion that the entire midshelf deposit was formed during the postglacial transgression. An alternative explanation, that <30% of the deposit is Holocene, requires that (1) sediment input is overestimated and/or loss is greatly underestimated, and (2) preservation on the shelf was significant despite deep and active wave scour observed in the form of rapid cliff and bedrock cutting early and late in the transgression. The difference between a basal age of ~14.5 ka and residence time of midshelf sediment (3,273 years), derived from dividing mudbelt volume by modern accumulation rate, implies: (1) significant sediment loss occurred since the mudbelt formed and/or (2) sediment accumulation has varied greatly over time. Although modern sediment budgets are relatively well constrained, it remains uncertain how well we can apply them to the past. An evolving model of sedimentation history explores the likelihood of changes in sediment supply, accumulation patterns, and depositional patterns owing to postglacial sea-level history and human land-use activities while providing important boundary conditions for modeling shoreface evolution., See also ADM002146. Presented at Oceans 2003 MTS/IEEE Conference, held in San Diego, California on September 22-26, 2003. Published in proceedings of the same, p1214-1218. ISBN 0-933957-31-9. U.S. Government or Federal Purpose Rights License, The original document contains color images.
Published: 2003

80. Science for Decisionmaking : Coastal and Marine Geology at the U.S. Geological Survey

Author: National Research Council, Division on Earth and Life Studies, Ocean Studies Board, Commission on Geosciences, Environment and Resources, Committee to Review the USGS Coastal and Marine Geology Program, National Research Council, Division on Earth and Life Studies, Ocean Studies Board, Commission on Geosciences, Environment and Resources, and Committee to Review the USGS Coastal and Marine Geology Program
Subjects: Coasts--United States, Coastal zone management--United States, Submarine geology
Abstract: The coastlines of the United States are beautiful places to live, work and play. But, they are also very fragile areas whose ecosystems are vulnerable to mismanagement. There are many complex issues facing the ocean science community at the federal, state and local levels—this report reflects the conclusions and recommendations of the National Academies drawing on discussions with USGS as well as input from potential users, clients and collaborators of the Coastal and Marine Geology Program.
Published: 1999

81. Icing on structures

Author: Minsk, L. D. (L. David), Geological Survey (U.S.). Office of Marine Geology; Cold Regions Research and Engineering Laboratory (U.S.), Minsk, L. D. (L. David), and Geological Survey (U.S.). Office of Marine Geology; Cold Regions Research and Engineering Laboratory (U.S.)
Abstract: REPORT 80-31 r -]E S DI D! Ç û û / Lnj n ¡ £ j « ITU Dll 1 5 Icing on structures ¡i. lljiS----., # * 1 3 1981 r & Power Resources Service Denver, Colorado Cover: Mountain-top radar site in Alaska encrusted with rime accumulation. (Photograph by author.) ,\ BUREAU OF RECLAMATION DENVER LIBRARY 1 2DS7 eibO Icing on structures L.D. Minsk December 1980 Prepared for OFFICE OF MARINE GEOLOGY U.S. GEOLOGICAL SURVEY By UNITED STATES ARMY CORPS OF ENGINEERS COLD REG IONS RE SEARCH AND ENGINEERING LABORATORY HANOVER, NEW HAMPSHIRE, U.S.A. Approved for public release; distribution unlimited. 92057960 Unclassified S E C U R IT Y C L A S S I F IC A T IO N O F T H IS P A G E (When Data Entered) REPORT DOCUMENTATION PAGE READ INSTRUCTIONS BEFORE COMPLETING FORM 1. R E P O R T N U M B E R -C R R E L Report 80-31 2. G O V T A C C E S S IO N NO. 3. R E C I P I E N T ' S C A T A L O G N U M B E R 4. T I T L E (and Subtitle) ICING ON STRU CTU R E S 5. T Y P E O F R E P O R T & P E R IO D C O V E R E D 6. P E R F O R M IN G ORG. R E P O R T N U M B E R 7. AUTHOR^«; L.D. Minsk 8. C O N T R A C T O R G R A N T N U M B E R ( s ) 9. P E R F O R M IN G O R G A N I Z A T IO N N A M E A N D A D D R E S S U.S. Army Cold Regions Research and Engineering Laboratory Hanover, New Hampshire 03755 10. P R O G R A M E L EM E N T , P R O J E C T , T A S K A R E A & WORK UN IT N U M B E R S 11. C O N T R O L L IN G O F F I C E N A M E A N D A D D R E S S Office of Marine Geology U.S. Geological Survey Reston, Virginia 22092 12. R E P O R T D A T E December 1980 13. N U M B E R O F P A G E S 2 2 14. M O N IT O R IN G A G E N C Y N A M E & A D D R E S S^ / / different from Controlling Office) 15. S E C U R IT Y C L A S S , (of thia report) Unclassified 15«. D E C L ASSI FI C A T IO N /D OW N G R A D IN G S C H E D U L E 16. D I S T R IB U T IO N S T A T E M E N T (of thia Report) Approved for public release; distribution unlimited. 17. D I S T R IB U T IO N S T A T E M E N T (of the abstract entered in
Published: 1980

82. Enhanced terrigenous organic matter input and productivity on the western margin of the Western Pacific Warm Pool during the Quaternary sea-level lowstands: Forcing mechanisms and implications for the global carbon cycle

Author: Tiegang Li, Rongtao Sun, Shiming Wan, Fengming Chang, Dhongil Lim, Zhaojie Yu, Peter D. Clift, Zhaokai Xu, Christophe Colin, Key Laboratory of Marine Geology and Environment [China, Institute of Oceanology [China], Géosciences Paris Saclay (GEOPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Louisiana State University (LSU), CAS Institute of Oceanology (IOCAS), Chinese Academy of Sciences [Beijing] (CAS), Shandong Vocational University of Science and Technology (SDVUST), CAS Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, and South Sea Research Institute, Korea Institute of Ocean Science & Technology, Geoje 53201
Subjects: 010506 paleontology, Archeology, Global and Planetary Change, geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Continental shelf, Terrigenous sediment, Biological pump, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Geology, 01 natural sciences, Western Hemisphere Warm Pool, Carbon cycle, Bottom water, Oceanography, 13. Climate action, [SDU]Sciences of the Universe [physics], Environmental science, 14. Life underwater, Quaternary, Ecology, Evolution, Behavior and Systematics, Sea level, 0105 earth and related environmental sciences
Abstract: International audience; Changes in terrigenous organic matter (OM) input, productivity and the associated bottom-water redox conditions, together with forcing mechanisms and global carbon cycle implications of such variations, on the western margin of the Western Pacific Warm Pool (WPWP) during the Quaternary remain controversial. In this study, we reconstructed the hydrological dynamics, terrigenous OM input, productivity, and deep-sea redox conditions using one core from the continental slope of the Philippine Sea. The new data were integrated with published proxies from the same core and two additional cores from the abyssal Philippine Sea. The results exhibited noticeable variations in the abovementioned indicators, in correspondence to changes in the supply of terrigenous material. The continental slope deposition featured signals of strong physical erosion and chemical weathering of unconsolidated sediments on the exposed continental shelf during the Quaternary sea-level lowstands, which significantly contributed to increased terrigenous OM input and productivity and, in turn, decreased bottom-water oxygenation and atmospheric CO2 concentrations. In the abyssal Philippine Sea, increased Asian dust-driven OM input and productivity also acted as a sink of atmospheric CO2 during sea-level lowstands. Analysis of the data suggested that the enhanced terrigenous OM input and biological pump and thus the decreased dissolved oxygen level of the bottom water on the western margin of the WPWP played important roles in modifying the global carbon cycle during sea-level lowstands. In contrast, the influence of hydrological dynamics on terrigenous OM input, productivity, and redox conditions therein during the Quaternary was limited.
Published: 2020
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83. The Messinian erosional surface and early Pliocene reflooding in the Alboran Sea: New insights from the Boudinar basin, Morocco

Author: Johanna Lofi, Frédéric Quillévéré, Abdelkhalak Ben Moussa, Michel Séranne, Mohammed Achalhi, Gilles Merzeraud, Ali Azdimousa, Pierre Moisette, Jean-Jacques Cornée, Philippe Münch, Mihaela Carmen Melinte-Dobrinescu, Christian Chaix, Géosciences Montpellier, Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Université Mohamed 1er, faculté des sciences, Oujda, Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), National Institute of Marine Geology and Geo-ecology (GeoEcoMar ), Histoire naturelle de l'Homme préhistorique (HNHP), Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD), Université Abdelmalek Essaâdi (UAE), Université Mohammed Premier [Oujda], Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), National Institute for Marine Geology and Geo-ecology (GeoEcoMar ), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)
Subjects: geography, geography.geographical_feature_category, 010504 meteorology & atmospheric sciences, Stratigraphy, Alluvial fan, Geology, Messinian Salinity Crisis, Late Miocene, 010502 geochemistry & geophysics, Neogene, 01 natural sciences, Onlap, Alboran Sea, Morocco, Zanclean flooding, Paleontology, Basement (geology), Subaerial, Marl, Boudinar basin, 14. Life underwater, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology, 0105 earth and related environmental sciences, Marine transgression
Abstract: International audience; New investigations in the Neogene Boudinar basin (Morocco) provide new information about the Messinian Salinity Crisis (MSC) and Zanclean reflooding in the southern part of the Alboran realm (westernmost Mediterranean). Based on a new field, sedimentological and palaeontological analyses, the age and the geometry of both the Messinian erosional surface (MES) and the overlying deposits have been determined. The MES is of late Messinian age and was emplaced in subaerial settings. In the Boudinar basin, a maximum of 200 m of Miocene sediments was eroded, including late Messinian gypsum blocks. The original geometry of the MES is preserved only when it is overlain by late Messinian continental deposits, conglomeratic alluvial fans or lacustrine marly sediments. These sediments are interpreted as indicators of the sea-level fall during the MSC. Elsewhere in the basin, the contact between late Messinian and early Pliocene deposits is a low-angle dipping, smooth surface that corresponds to the early Pliocene transgression surface that subsequently re-shaped the regressive MES. The early Pliocene deposits are characterized by: (i) their onlap onto either the basement of the Rif chain or the late Miocene deposits; (ii) lagoonal deposits at the base to offshore marls and sands at the top (earliest Pliocene; 5.33–5.04 Ma interval; foraminifer zone PL1); (iii) marine recovery occurring in the 5.32–5.26 Ma interval; and (iv) the change from lagoonal to offshore environments occurring within deposits tens of metres thick. This information indicates that at least the end of the reflooding period was progressive, not catastrophic as previously thought.
Published: 2016
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84. Increased seasonality and aridity drove the C4 plant expansion in Central Asia since the Miocene–Pliocene boundary

Author: Christophe Colin, Wenqiang Pei, Shiming Wan, Xuefa Shi, Xingyan Shen, Yang Tan, Xuejun Jiang, Ryuji Tada, Anchun Li, Key Laboratory of Marine Geology and Environment [China, Institute of Oceanology [China], University of Chinese Academy of Sciences [Beijing] (UCAS), Qingdao National Laboratory for Marine Science and Technology, Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Department of Earth and Planetary Science [Tokyo], The University of Tokyo (UTokyo), SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Peoples R China., Institut des Systèmes Intelligents et de Robotique (ISIR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China, Université Paris Diderot - Paris 7 (UPD7), State Key Laboratory of Marine Geology [Shanghai], Tongji University, Graduate School of Science [Tokyo], and The University of Tokyo (UTokyo)-The University of Tokyo (UTokyo)
Subjects: Biomass (ecology), 010504 meteorology & atmospheric sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Westerlies, Vegetation, 15. Life on land, Seasonality, Late Miocene, 010502 geochemistry & geophysics, medicine.disease, 01 natural sciences, Arid, Geophysics, 13. Climate action, Space and Planetary Science, Geochemistry and Petrology, Isotopes of carbon, [SDU]Sciences of the Universe [physics], Earth and Planetary Sciences (miscellaneous), medicine, Physical geography, Precipitation, Geology, 0105 earth and related environmental sciences
Abstract: Continuous and high-resolution records of the content, mass accumulation rate (MAR) and δ 13 C values of black carbon obtained from Integrated Ocean Drilling Program (IODP) Site U1430 in the southwestern Japan Sea have been established and combined with previous results obtained from Central Asia. The main objective of this work is to reconstruct the historical changes in vegetation types (C3–C4), and to constrain the driving force of C4 plant expansion over the last 13 Ma. The stable carbon isotope value of black carbon ( δ 13 CBC) shows a major shift since the Miocene–Pliocene boundary (∼5.3 Ma), suggesting significant expansion of C4 plants in broad areas of Central Asia, including the inland basins of northwestern China and the Loess Plateau. However, a decline in the content and MAR of black carbon reveals the absence of any link between fire and C4 plant expansion in Central Asia, due to the dramatic decrease in biomass under a drying regime. On a global scale, asynchronous expansion of C4 plants suggests that regional hydroclimatic change, rather than decline in CO2 concentration, was the most important factor to influence C4 expansion. We propose that the increased seasonality and the enhanced long-term aridity driven by the concurrent decline in winter westerly vapor, and increase in East Asian summer monsoon precipitation, were the main driving forces of C4 plant expansion in broad areas of Central Asia. Variations in winter westerly moisture have played a significant role in changes of regional climate and vegetation in Central Asia since the late Miocene.
Published: 2018
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85. Antarctic Intermediate Water penetration into the Northern Indian Ocean during the last deglaciation

Author: Christophe Colin, Arnaud Dapoigny, Zhaojie Yu, F. Bassinot, Shiming Wan, Qiong Wu, Laure Meynadier, Ruifang Ma, Nejib Kallel, Sophie Sépulcre, Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Key Laboratory of Marine Geology and Environment [China, Institute of Oceanology [China], Center for Ocean Mega-Science, Chinese Academy of Sciences, Institut de Physique du Globe de Paris (IPGP), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS), College of Oceanography, Hohai University, Unité GEOGLOB, Faculté des Sciences de Sfax, Université de Sfax - University of Sfax-Université de Sfax - University of Sfax, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Géochrononologie Traceurs Archéométrie (GEOTRAC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Paléocéanographie (PALEOCEAN), This work was supported by the National Natural Science Foundation of China (41622603 and 41576034), National Programme on Global Change and Air–Sea Interaction (GASI-GEOGE-03), Innovation Project (2016ASKJ13) and Aoshan Talents programme (2017ASTCP-ES01) of Qingdao National Laboratory for Marine Science and Technology and CAS Interdisciplinary Innovation Team, Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences (No. MGE2018KG01). Z. Yu acknowledges the China Scholarship Council for providing funding for his study in France. This study was supported by the Labex L-IPSL and the MONOPOL projects, which are funded by the ANR (grant nos. ANR-10-LABX-0018 and ANR 2011 Blanc SIMI 5-6 024 04), ANR-10-LABX-0018,L-IPSL,LabEx Institut Pierre Simon Laplace (IPSL): Understand climate and anticipate future changes(2010), ANR-11-BS56-0024,MONOPOL,Paléo-variabilité de la mousson indienne(2011), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), and ANR-10-LABX-0018/10-LABX-0018,L-IPSL,LabEx Institut Pierre Simon Laplace (IPSL): Understand climate and anticipate future changes(2010)
Subjects: 010504 meteorology & atmospheric sciences, Climate change, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, 010502 geochemistry & geophysics, 01 natural sciences, Panoply, law.invention, Foraminifera, Geochemistry and Petrology, law, Earth and Planetary Sciences (miscellaneous), Deglaciation, 14. Life underwater, Radiocarbon dating, 0105 earth and related environmental sciences, Carbon dioxide in Earth's atmosphere, Antarctic Intermediate Water, biology, Northern Hemisphere, biology.organism_classification, Geophysics, Oceanography, 13. Climate action, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Upwelling, Geology
Abstract: The two-stage increase in atmospheric carbon dioxide (CO2), and the associated decrease in radiocarbon (14C) during the last deglaciation, are thought to have been linked to enhanced Southern Ocean upwelling and the rapid release of sequestered 14C-depleted CO2. Antarctic Intermediate Water (AAIW), originating from the Southern Ocean, reflects variations in the Southern Ocean and, crucially, mirrors the chemical signature of upwelling deep water. However, the penetration of AAIW into the Northern Indian Ocean and its relationship with deglacial climate changes have not been thoroughly elucidated to date. Here, we present the neodymium isotopic composition ( e Nd ) of mixed planktonic foraminifera from core MD77-176 from an intermediate depth in the Northern Indian Ocean to reconstruct the past evolution of intermediate water during deglaciation. The e Nd record in the Northern Indian Ocean displays two pulse-like shifts towards more radiogenic Southern Ocean values during the deglaciation, and these shifts coincide with excursions in Δ 14 C and e Nd records in the Pacific and Atlantic Oceans. These results suggest invasion of AAIW into the Northern Hemisphere oceans associated with enhanced Southern Ocean ventilation during deglaciation. Our new e Nd record strongly supports the close linkage of AAIW propagation and atmospheric CO2 rise through Southern Ocean ventilation during deglaciation.
Published: 2018
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86. Are Paleomagnetic Records From U-Channels Appropriate for Studies of Reversals and Excursions?

Author: Édouard G. H. Philippe, Jean-Pierre Valet, Guillaume St-Onge, Anojh Thevarasan, Institut des Sciences de la MER de Rimouski (ISMER), Université du Québec à Rimouski (UQAR), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), ERCAdvanced grant GA 339899-EDIFICEunder the ERC’s 7th FrameworkProgram (FP7-IDEAS-ERC) and by anNSERC Discovery Grant., 2Institut des sciences de la mer de Rimouski, Canada Research Chair in Marine Geology and GEOTOP, Université du Québec à Rimouski, Rimouski, Quebec, Canada, Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS), and Institut des sciences de la mer de Rimouski, Canada Research Chair in Marine Geology and GEOTOP, Université du Québec à Rimouski, Rimouski, Quebec, Canada
Subjects: Paleomagnetism, 010504 meteorology & atmospheric sciences, geomagnetic excursions, paleomagnetic measurements, Magnetometer, Polarity (physics), Rapid Time Variations, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, geomagnetic reversals, 010502 geochemistry & geophysics, 01 natural sciences, Geomagnetic reversal, law.invention, Geomagnetism and Paleomagnetism, Geomagnetic Induction, Geochemistry and Petrology, law, Instruments and Techniques, Magnetism in the Geosciences ‐ Advances and Perspectives, Research Articles, 0105 earth and related environmental sciences, Geomagnetic secular variation, Excursion, Sampling (statistics), Geodesy, Geophysics, Earth's magnetic field, 13. Climate action, [SDU]Sciences of the Universe [physics], Geology, Research Article
Abstract: Sampling of sediment cores using plastic U‐channels has made possible the acquisition of detailed records of paleomagnetic secular variation, geomagnetic polarity, environmental magnetic studies, and relative paleointensity over the past several million years. U‐channel measurements provide the great advantage of rapid measurements of long sediment cores, but the signal resolution is attenuated by the response function of the magnetometer sensors, which therefore restrains the recovery of rapid and large‐amplitude field changes. Here we focus on the suitability of the dynamics of reversals and excursions derived from U‐channel measurements. We compare successive individual paleomagnetic directions of 1.5 cm × 1.5 cm × 1.5 cm cubic discrete samples with those of a 1.5‐m equivalent U‐channel sample train obtained by placing the samples adjacent to each other. We use varying excursion and transition lengths and generate transitional directions that resemble those of the most detailed paleomagnetic records. Excursions with opposite polarity directions recorded over less than 7.5 cm are barely detected in U‐channel measurements. Regarding reversals, U‐channel measurements smooth the signal of low‐resolution records and generate artificial transitional directions. Despite producing misleading similarities with the overall structure of transition records, longer transitional intervals fail also to reproduce the complexity of field changes. Finally, we test the convolution of magnetization by different response functions. The simulation reveals that even small response function changes can generate significant differences in results., Key Points U‐channel measurements fail to detect rapid excursions, except in the presence of high deposition ratesU‐channel fails to duplicate the original features of the field changes during polarity transitionsDiscrete samples of small size are thus required to fully reconstruct the detailed dynamics of reversals and excursions
Published: 2018
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87. Crustal strain in the Marmara pull-apart region associated with the propagation process of the North Anatolian Fault

Author: Mihaela Carmen Melinte-Dobrinescu, Cagil Karakas, Roland Armijo, Robin Lacassin, Jean-Pierre Suc, Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de la Terre de Paris (iSTeP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), National Institute of Marine Geology and Geo-ecology (GeoEcoMar ), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS), National Institute for Marine Geology and Geo-ecology (GeoEcoMar ), and Earth Observatory of Singapore
Subjects: bepress|Physical Sciences and Mathematics, Dardanelles, 010504 meteorology & atmospheric sciences, bepress|Physical Sciences and Mathematics|Earth Sciences|Tectonics and Structure, Ganos-Gelibolu Fold, North Anatolian Fault, bepress|Physical Sciences and Mathematics|Earth Sciences, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Stratigraphy, Fault (geology), Late Miocene, Messinian Salinity Crisis, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences, 010502 geochemistry & geophysics, 01 natural sciences, Deposition (geology), crustal shortening, Paleontology, Geochemistry and Petrology, Lithosphere, continental lithosphere, structural unconformity, 0105 earth and related environmental sciences, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, geography, geography.geographical_feature_category, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Geology, bepress|Physical Sciences and Mathematics|Earth Sciences|Geology, Anticline, fault propagation, bepress|Physical Sciences and Mathematics|Earth Sciences|Stratigraphy, EarthArXiv|Physical Sciences and Mathematics, Tectonics, Geophysics, 13. Climate action, EarthArXiv|Physical Sciences and Mathematics|Earth Sciences|Tectonics and Structure, Sedimentary rock, Geology
Abstract: Propagation processes of plate‐scale faults through continental lithosphere are poorly documented. The North Anatolian Fault (NAF) is a continental right‐lateral transform with striking evidence for propagation processes in the Marmara Sea pull‐apart region. Earlier work (Armijo et al., 1999, https://doi-org.ezlibproxy1.ntu.edu.sg/10.1130/0091‐7613(1999)0272.3.CO;2) suggests that in the Dardanelles, where the principal, northern branch of that fault (NNAF) enters into the Aegean: (1) a fold‐thrust system has progressively developed above the NNAF fault tip, at the WSW corner of the Marmara Sea pull‐apart. The main anticline formed there was sheared and its SW half laterally offset by ~70 km to the SW; (2) the timing of structure development appears correlated with sea level changes associated with the Messinian Salinity Crisis. Our new description of the Dardanelles (or Ganos‐Gelibolu) fold‐thrust system is based on structural mapping, field observations, and calcareous nannoplankton analyses to date key sedimentary units. Our results provide tight constraints on the main pulse of folding associated with propagation of the tip of the NNAF: it took place in the late Miocene to earliest Pliocene (5.60 to 5.04 Ma), before deposition of undeformed Pliocene marine sediments. The folding is mostly coeval with the Messinian Salinity Crisis and accommodated several kilometers of shortening at the fault tip. After full propagation of the NNAF up to the surface, the folded structure was sheared and right laterally offset, with an average 14 mm/year of slip rate during the past ~5 Myrs. A reconstruction of tectonic evolution suggests a flower structure nucleating and taking root at the tip of the fault. Published version
Published: 2018
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88. ENSO-Like Modulated Tropical Pacific Climate Changes Since 2.36 Myr and Its Implication for the Middle Pleistocene Transition

Author: Zhaojie Yu, Shiming Wan, Tiegang Li, Hanjie Sun, Debo Zhao, Jie Huang, Christophe Colin, Zhaokai Xu, Lina Song, Anchun Li, Institute of Oceanology [China], Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China, Université Paris Diderot - Paris 7 (UPD7), Key Laboratory of Marine Geology and Environment [China, State Key Laboratory of Marine Geology [Shanghai], and Tongji University
Subjects: Early Pleistocene, 010504 meteorology & atmospheric sciences, Pleistocene, Middle Pleistocene Transition, Climate change, West Philippine Sea, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, 010502 geochemistry & geophysics, 01 natural sciences, Geochemistry and Petrology, ENSO‐like system, 14. Life underwater, ENSO-like system, 0105 earth and related environmental sciences, grain size, myr, East Asian monsoon precipitation, Sea surface temperature, Geophysics, Oceanography, 13. Climate action, [SDU]Sciences of the Universe [physics], Upwelling, Walker circulation, Quaternary, Geology
Abstract: International audience; El Niño/Southern Oscillation (ENSO) activity and the Pacific Walker Circulation are controlled by the zonal sea surface temperature (SST) gradient between the western and Eastern Equatorial Pacific (EEP) and the corresponding barometric difference. Variations in the zonal SST gradient since the early Pleistocene have primarily been triggered by changes in the SST in the Eastern Equatorial Pacific. However, the response of the ENSO‐like long‐term state to the cooling of the EEP and its coupling role with tropical Pacific climate changes are still not well established. Here we present a high‐resolution grain‐size record spanning the last 2.36 Myr, obtained from marine core sediment located in the West Philippine Sea in order to decipher the tropical pacific climate changes and reveal its controlling mechanism. By combining our data with other long‐term climatic records from the Equatorial Pacific, we demonstrate that the cooling of SST and enhanced upwelling in the EEP resulted in the development of the Walker Circulation and increased monsoon precipitation in Luzon from 2.2 to 1.6 Myr, from 1.2 to 0.8 Myr, and since 0.2 Myr ago. The progressive cooling of the high‐latitudes in the Quaternary may be responsible for our observation here. A newly identified 100 kyr dominant period between 2.2 and 1.6 Myr in the ENSO‐like modulated Pacific climate records indicates that the ENSO‐like system may play a key role in facilitating or responding to the global climate changes.
Published: 2018
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89. First evidence of a mid-holocene earthquake-triggered megaturbidite south of the chile triple junction

Author: Catherine Kissel, Maarten Van Daele, Alvaro Tamayo Hernando, Ricardo De Pol-Holz, Sebastien Bertrand, Loic Piret, Snecma Propulsion Solide (SPS), SAFRAN Group, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Climat et Magnétisme (CLIMAG), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Departamento de Oceanografía [Concepción], Universidad de Concepción [Chile], Renard Centre of Marine Geology (RCMG), Universiteit Gent, Snecma Propulsion Solide ( SPS ), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] ( LSCE ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), Renard Centre of Marine Geology ( RCMG ), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Universidad de Concepción - University of Concepcion [Chile], and Universiteit Gent = Ghent University (UGENT)
Subjects: [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere, Earthquake, 010504 meteorology & atmospheric sciences, Stratigraphy, Glacial lake outburst flood, Outburst flood, 010502 geochemistry & geophysics, Turbidite, 01 natural sciences, law.invention, Sedimentary depositional environment, Paleontology, law, Patagonia, [ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces, environment, Radiocarbon dating, Sedimentology, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Holocene, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Subduction, Triple junction, food and beverages, Geology, Sediment provenance
Abstract: Megaturbidites have been the focus of many paleoseismic and paleoenvironmental studies because they can provide evidence for catastrophic and/or hazardous events with potentially major environmental implications. During a recent research cruise in Baker Fjord, Chile (47°54′S–74°30′W), a megaturbidite was described between the Northern and Southern Patagonian Icefields. Here, we aim to determine the depositional processes of the megaturbidite and identify its origin. Based on the turbidite's location, a possible origin was the early Holocene drainage of paleo-lake General Carrera, which was recently proposed in the literature as having produced a Glacial Lake Outburst Flood (GLOF) that drained through Baker Fjord. Due to the fjord's location in a subduction zone, and close to the Chile Triple Junction, however, seismic activity must also be considered as a potential triggering mechanism. To achieve our goals, we undertook a multi-proxy analysis of sediment core MD07-3121, including sedimentology (grain size, loss-on-ignition, foraminifera counts), magnetic properties, bulk organic geochemistry, and radiocarbon dating, and we analysed bathymetric maps and sub-bottom profiles. Our grain-size results display a diagnostic fining upward trend and show evidence of seiching in the 733-cm-thick megaturbidite. The age of the event (5513–5211 cal yr BP) contradicts the hypothesis of an early Holocene GLOF origin. Bulk organic geochemical results indicate that the sediments that compose the turbidite are clearly of marine origin, which further goes against a GLOF origin. In addition, the megaturbidite is underlain by a 1136 cm thick mass transport deposit (MTD), also composed of marine sediments. According to the sub-bottom profiles, the MTD and the megaturbidite originate from the reworking of thick packages of sediment previously deposited on nearby sills and on the fjord's flanks. Furthermore, similar coeval deposits are found in an adjacent sub-basin. We therefore interpret these deposits to be triggered by an earthquake during the late mid-Holocene. While megathrust and intraslab earthquakes are possible in the region, we argue that a crustal earthquake is the most likely seismic trigger in the study area. This study reveals the first earthquake-triggered megaturbidite south of the Chile Triple Junction.
Published: 2018
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90. Holocene Event Record of Aysén Fjord (Chilean Patagonia): An Interplay of Volcanic Eruptions and Crustal and Megathrust Earthquakes

Author: Maarten Van Daele, Giuseppe Siani, Galderic Lastras, Frank Lamy, Katleen Wils, Catherine Kissel, Renard Centre of Marine Geology (RCMG), Department of Geology, Ghent University, Ghent, Belgium, Renard Centre of Marine Geology (RCMG), Universiteit Gent, GRC Geociències Marines, Department of Earth and Ocean Dynamics, Universitat de Barcelona, Barcelona, Spain, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Climat et Magnétisme (CLIMAG), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Universiteit Gent = Ghent University (UGENT), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010504 meteorology & atmospheric sciences, seismic stratigraphy, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Paleoseismology, fjord, 010502 geochemistry & geophysics, Megathrust earthquake, 01 natural sciences, law.invention, Geochemistry and Petrology, law, Earth and Planetary Sciences (miscellaneous), Radiocarbon dating, Holocè, Chile, Holocene, 0105 earth and related environmental sciences, landslides, Paleosismologia, Geophysics, Seismic hazard, Stratigraphy, 13. Climate action, Space and Planetary Science, Esllavissades, [SDU]Sciences of the Universe [physics], Epicenter, Estratigrafia sísmica, Patagònia (Argentina i Xile), Patagonia (Argentina and Chile), Tephrochronology, paleoseismology, Seismology, Geology
Abstract: International audience; In the first months of 2007, the Aysén region in southern Chile was affected by a crustal seismic swarm. Its largest earthquake (M w 6.2) occurred in April and had its epicenter in Aysén Fjord. Seismic intensities became so high that hundreds of onshore mass movements were triggered, several of which entered into the fjord, resulting in mass transport deposits (MTDs) preserved at the fjord bottom. Here we present a Holocene record of paleo-earthquakes in the previously unstudied Patagonian fjordland based on MTD stratigraphy. High-resolution seismic data retrieved using two different seismic systems (sparker and TOPAS) reveal multiple older MTDs on different stratigraphic levels. Correlation of the seismic stratigraphy with sedimentological data obtained from a long Calypso core (MD07-3117) allows conclusion on the seismic origin of these deposits. Additionally, radiocarbon dating permits constructing an age model, validated by tephrochronology, providing an age for the different MTD levels. We thus present a highly detailed paleoseismological history of the Aysén region, including at least six major Holocene earthquakes, one of which is likely related to a known megathrust earthquake. Other earthquakes are related to activity of the Liquiñe-Ofqui Fault Zone (LOFZ), forming the main source of seismic hazard in the area. We can infer a general average recurrence time for LOFZ earthquakes of~2,100 years in the vicinity of Aysén Fjord with clustered events during the early and late Holocene. Finally, we argue that cascading events (causal link between volcanic and seismic events) may be a frequent phenomenon along the LOFZ.
Published: 2018
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91. Search for Tensor, Vector, and Scalar Polarizations in the Stochastic Gravitational-Wave Background

Author: T. A. Callister, N. Kijbunchoo, G. Kang, C. C. Yancey, C. A. Costa, A. Dasgupta, M. C. Milovich-Goff, I. Belahcene, Jade Powell, V. Mangano, P. Schale, J. L. Wright, P. T.H. Pang, Francesco Pannarale, R. Flaminio, J.-P. Coulon, Yi-Ming Hu, C. Aulbert, A. Rocchi, A. E. Pace, Sumanta Tewari, C. Cocchieri, Alejandro Torres-Forné, B. Goncharov, R. Birney, Lloyd Paul Aiello, B. C. Pant, M. Afrough, R. A. Mercer, F. Jiménez-Forteza, Sourav Ghosh, Imre Bartos, W. H. Wang, Odylio D. Aguiar, J. E. Lord, E. J. Daw, Maurizio Canepa, M. Punturo, J. Neilson, Alex B. Nielsen, V. Quetschke, G. M. Guidi, G. Kuehn, S. Privitera, Antonio Marquina, Paolo Addesso, K. D. Giardina, D. Tuyenbayev, Maria Ilaria Del Principe, M. Agathos, Martin M. Fejer, J. R. Smith, S. Ghonge, K. AultONeal, C. S. Unnikrishnan, W. Katzman, R. Douglas, F. J. Raab, V. Kondrashov, N. Mukund, L. R. Cominsky, J. K. Wofford, M. A. Page, S. Khan, A. Lazzarini, C. Lazzaro, T. Z. Summerscales, V. Boschi, R. J. G. Jonker, Jay D. Tasson, M. Landry, L. Sammut, M. Factourovich, J. S. Lange, Patricia Schmidt, A. Avila-Alvarez, V. Brisson, J. C. Driggers, L. Di Fiore, B. Mours, C. Austin, A. Schönbeck, B. Rajbhandari, Daniel Wysocki, M. Barsuglia, Yuri Levin, G. Greco, L. van der Schaaf, S. A. Pai, D. Moraru, Antoine Heidmann, D. Töyrä, R. Gustafson, G. Rutins, P. J. Sutton, Graham Woan, Robert L. Byer, Stuart Reid, G. Valdes, A. Samajdar, Steven D. Penn, Jacob Scheuer, Gianpietro Cagnoli, Giuseppe Intini, Hyang Woon Lee, Robert Stone, D. Steinmeyer, E. G. Thomas, A. Basti, Ryan N. Lang, Jens Birch, E. A. Chase, D. Tao, P. A. Altin, Alvin J. K. Chua, D. Barker, B. Sassolas, Tristan Briant, L. Sun, H. Fong, O. Sauter, E. J. King, M. Muratore, Heinz-Bernd Eggenstein, Z. Du, P. Aufmuth, R. Bhandare, M. Gosselin, A. Allocca, Xing-Jiang Zhu, S. Antier, M. Dovale Álvarez, S. E. Strigin, M. Kasprzack, Michael L. Gorodetsky, J.-P. Zendri, Bernard F. Schutz, Li Ju, Daniel A. Shaddock, David Keitel, J. H. Romie, M. Drago, J. Meidam, Guenakh Mitselmakher, L. Wallace, Z. Frei, S. J. Cooper, J.-D. Fournier, S. Dhurandhar, Samuele Cortese, K. K.Y. Ng, A. Pal-Singh, Jong H. Chow, J. Liu, D. M. Macleod, Charalampos Markakis, S. T. Countryman, K. A. Thorne, Ryan Lynch, Brittany Kamai, Y. Bouffanais, Y. Q. Ma, B. A. Boom, L. Cunningham, A. Lartaux-Vollard, Suvadeep Bose, Vuk Mandic, R. A. Eisenstein, B. J. J. Slagmolen, R. Gouaty, Steven Bloemen, F. Frasconi, Jonathan R. Gair, Roman Schnabel, A. Lenon, B. R. Hall, C. Horst, G. D. Meadors, J. E. Brau, A. A. van Veggel, Andrew Matas, A. Pasqualetti, Surabhi Sachdev, Christopher J. Moore, J. Zweizig, K. Napier, Guido Mueller, Hang Yu, S. Doravari, Hsiao-Wen Chen, Maher Yazback, M. Pedraza, Patrick Brady, J. S. Areeda, T. Theeg, H. S. Cho, Efim A. Khazanov, G. Ballardin, Moritz Mehmet, S. J. Kapadia, J. M. Gonzalez Castro, R. Quitzow-James, R. M. S. Schofield, G. Cerretani, S. Biscoveanu, R. Sturani, Innocenzo M. Pinto, B. R. Iyer, M. Zanolin, Lee McCuller, Serena Vinciguerra, N. Mazumder, R. Pedurand, Benno Willke, P. Ehrens, J. Hennig, O. J. Piccinni, Antoni Ramos-Buades, A. Singhal, T. D. Abbott, O. Puncken, Zoheyr Doctor, A. W. Heptonstall, V. Gayathri, L. M. Perri, H. A. G. Gabbard, Alberto Vecchio, F. Martelli, T. Zelenova, M. Bawaj, Riccardo Bassiri, Magnus Manske, Will M. Farr, M. Montani, P. Weßels, A. Królak, Rana X. Adhikari, B. Pang, Simon Stevenson, Nancy Aggarwal, M. Vardaro, J. Ming, S. Koley, N. A. Lockerbie, S. S. Eikenberry, E. A. Muñiz, S. Brunett, B. Machenschalk, S. Walsh, F. Donovan, F. Y. Khalili, D. Sellers, E. Bonilla, G. Bergmann, L. Rei, Sebastian Steinlechner, B. Shapiro, Kazuhiro Agatsuma, Archisman Ghosh, E. L. Merilh, R. Kennedy, S. D. Linker, A. Bozzi, Stanislav Babak, M. Tonelli, A. Bisht, S. R. Morriss, Chunglee Kim, Miriam Cabero, E. Coughlin, Alessandra Buonanno, T. Hardwick, M. H. Wimmer, A. Effler, R. Metzdorff, H. Yamamoto, Gabrielle Allen, D. Barta, Soumi De, J.-M. Isac, J. S. Kissel, H. Cao, D. J. Vine, Duncan A. Brown, Tania Regimbau, W. Parker, I. Dave, M. Fletcher, B. Hughey, S. B. Anderson, A. Bohe, Geoffrey Lovelace, P. Hopkins, K. Izumi, B. D. Cheeseboro, C. Graef, Mark A. Scheel, M. Bejger, R. Kirchhoff, B. L. Pearlstone, David B. Tanner, S. C. McGuire, P. G. Murray, Hartmut Grote, T. P. Downes, N. Letendre, Roger Jones, T. Denker, G. Losurdo, A. Noack, V. J. Roma, S. J. Kimbrell, P. T. Baker, F. Travasso, A. P. Spencer, Kendall Ackley, R. K. Nayak, Lei Zhang, C. Whittle, S. S. Forsyth, J. A. Clark, A. S. Markosyan, G. Traylor, D. D. Brown, M. Fyffe, David Coward, Anthony A. Amato, N. van Bakel, Zachariah B. Etienne, P. Oppermann, M. J. Yap, Jennifer Watchi, R. Mittleman, P. Fulda, F. Marion, C. F. Da Silva Costa, Andrew Lundgren, S. Xiao, Nelson Christensen, V. Kringel, F. Carbognani, S. A. Usman, Carlos O. Lousto, C. Kent, J. Trinastic, A. Gennai, H. Y. Chia, M. Haney, L. Naticchioni, Piotr Jaranowski, R. Bonnand, D. Talukder, A. Masserot, M. Weinert, Salvatore Vitale, K. Kawabe, M. Constancio, A. R. Williamson, T. Sadecki, W. S. Kim, S. E. Barclay, D. Lumaca, Sascha Husa, K. E. Ramirez, A. S. Sengupta, S. M. Aston, K. Ueno, Michael W. Coughlin, A. L. Urban, M. Laxen, G. Venugopalan, D.B. DeBra, A. Giazotto, M. Tápai, P. Shawhan, M. Ducrot, I. Ferrante, Z. Khan, D. S. Rabeling, M. Di Giovanni, K. E. Gushwa, Ofek Birnholtz, K. Mason, J. Suresh, D. Hoak, M. F. Carney, R. Passaquieti, Neil J. Cornish, D. C. Coyne, V. Sandberg, R. Cavalieri, F. Cavalier, J. Eichholz, B. Weaver, D. Moffa, A. K. W. Chung, Erik Katsavounidis, R. De Pietri, Jocelyn Read, G. P. Newton, Gabriela Gonzalez, S. Gaudio, N. A. Robertson, D. Sentenac, J. A. Sonnenberg, Eric Howell, V. Germain, S. Gomes, R. De Rosa, K. R. Corley, J. M. Newport, S. Mastrogiovanni, R. K. Lanza, Sylvia J. Zhu, Samuel Deléglise, S. C. Tait, Rocco Romano, Rajesh Kumar, A. Fernandez-Galiana, Zifan Zhou, I. A. Bilenko, David J. Ottaway, P. Leaci, A. Colla, S. Leavey, Hai-Ping Cheng, M. Katolik, S. Ossokine, Jinsook Kim, L. K. Nuttall, Xin Chen, R. M. Martin, David A. Nichols, D. Nolting, C. North, Thomas Dent, C. Pankow, B. U. Gadre, Sebastien Biscans, D. H. Reitze, M. S. Shahriar, P. Ruggi, C. V. Kalaghatgi, M. J. Cowart, Michael Zevin, P. Dupej, Sumit Kumar, David Jonathan Hofman, B. Gateley, P. Corban, M. C. Tringali, I. Nardecchia, X. Guo, H. Vahlbruch, K. Riles, Vladimir Dergachev, R. Macas, P. M. Meyers, Barry C. Barish, G. Billingsley, S. Macfoy, L. Trozzo, Priscilla Canizares, H. Middleton, B. B. Miller, Howard Pan, Aaron Buikema, J. Hanson, Isabel Cordero-Carrión, Paul J. Groot, Samaya Nissanke, F. Fidecaro, Ashutosh Kumar Singh, M. Vasúth, S. Appert, L. Pinard, A. Cirone, Xavier Siemens, C. I. Torrie, Jan Harms, C. Mishra, B. Lantz, M. Favata, John Veitch, J. Lehmann, J. C. Barayoga, James Whelan, Jonathan Blackman, A. Moggi, C. Messick, J. Calderón Bustillo, A. Sergeev, H. N. Isa, M. Leonardi, P. Ajith, Carlos Cepeda, K. Toland, Linqing Wen, S. Grunewald, M. Chan, G. Vedovato, H. Qi, A. Viceré, A. Gopakumar, N. Arnaud, Maggie Tse, Vijay Varma, C. Fee, D. Meacher, M. MacInnis, S. Bae, P. Rapagnani, J. Hanks, E. Coccia, L. Kleybolte, Colm Talbot, Andreas Freise, Vincenzo Pierro, Paul D. Lasky, G. Stratta, Torrey Cullen, K. Siellez, L.-W. Wei, Bernard F. Whiting, Tobias Westphal, S. J. Chamberlin, Riccardo Ciolfi, Yi Chen, Athol J. Kemball, B. W. Schulte, S. Márka, Jesper Munch, Matthew Pitkin, R. K.L. Lo, José A. Font, L. McNeill, Maya Fishbach, A. F. Brooks, Satyanarayan Ray Pitambar Mohapatra, P. J. Veitch, R. M. Blair, Irene Fiori, K. Venkateswara, G. A. Prodi, Benjamin J. Owen, M. De Laurentis, R. P. Fisher, S. Mitra, C. Messenger, X. Fan, David Jones, E. A. Quintero, M. Granata, J. Devenson, K. S. Karvinen, Marco Cavaglia, J. F. J. van den Brand, Subroto Mukherjee, A. Markowitz, P. Charlton, R. Frey, K. W. K. Wong, P. Brockill, N. Leroy, Shiuh Chao, M. Nery, S. Sunil, M. Tacca, Otto A. Hannuksela, Martin Hendry, Cecilio García-Quirós, Christopher Wipf, M. C. Díaz, K. V. Tokmakov, M. Yvert, E. C. Ferreira, Aniello Grado, B. Bécsy, Kenneth A. Strain, M. Sieniawska, M. Kinley-Hanlon, Pablo Cerdá-Durán, Peter R. Saulson, J. Prasad, T. Prestegard, Gregory Ashton, Terry G. McRae, Antonios Kontos, Fabio Marchesoni, P. B. Covas, Kyungmin Kim, Debarati Chatterjee, B. O'Reilly, P. Gruning, G. Pillant, Junwei Cao, J. Warner, L. G. Prokhorov, Olivier Minazzoli, M. Razzano, J. L. Willis, A. Nitz, V. Tiwari, M. J. Szczepańczyk, Fabien Kéfélian, E. Schreiber, F. Robinet, A. Post, Seog Oh, J. H. Hough, P. W. F. Forsyth, G. McIntyre, A. Cumming, F. Di Renzo, G. Mendell, F. Baldaccini, G. Dálya, Karan Jani, E. Goetz, E. Capocasa, Huang-Wei Pan, Gijs Nelemans, Leo Singer, L. F. Ortega, M. J. Hart, F. Nocera, I. Magaña Hernandez, E. D. Hall, T. J. Massinger, Jolien D. E. Creighton, T. Vo, C. De Rossi, Ryan Magee, A. Gupta, T. Shaffer, V. Raymond, J. K. Blackburn, S. Raja, J. W. W. Pratt, E. Chassande-Mottin, M. Korobko, Gregory M. Harry, V. Kalogera, A. K. Zadrożny, Sheila Rowan, M. Pürrer, S. Kwang, S. E. Dwyer, A. Sawadsky, Todd Adams, G. D. Hammond, Harald P. Pfeiffer, D. M. Wilken, M. Fitz-Axen, P. Bacon, Daniel E. Holz, G. Ciani, A. Parida, E. J. Son, A. Sheperd, M. van Beuzekom, M. Rizzo, H. K. Lee, V. Predoi, I. W. Martin, H. J. Bulten, David Cohen, David E. McClelland, B. Patricelli, D. S. Wu, Margaret Millhouse, Rosa Poggiani, L. Glover, S. G. Gaonkar, Haixing Miao, V. Frey, T. Di Girolamo, Karl Gill, S. Farinon, A. Pele, J. J. Bero, O. Bock, G. L. Mansell, K. L. Dooley, S. L. Danilishin, Lisa Barsotti, Arunava Mukherjee, M. Fays, R. Bork, Jing Wang, Y. Minenkov, A. Di Lieto, M. Saleem, C. Vorvick, Nicholas Demos, J. D. Lough, S. Kaufer, Jonathan Cripe, C. Beer, László Á. Gergely, Daichi Tsuna, Kevin M. Ryan, F. Vetrano, Rainer Weiss, F. Ricci, E. A. Houston, J. Westerweck, Y.-M. Kim, K. Mogushi, D. Estevez, Z. Tornasi, T. Etzel, P. J. King, K. H. Lai, Aaron Viets, J. Feicht, Joey Shapiro Key, J. R. Sanders, S. B. Coughlin, J. Betzwieser, John Miller, S. Caride, J. C. Bayley, H. Wittel, S. G. Schwalbe, D. Buskulic, W. W. Johnson, M. Poe, M. Phelps, R. G. Ormiston, C. Affeldt, D. Ugolini, C. Cahillane, R. Taylor, B. Day, A. Corsi, R. T. DeRosa, David Blair, M. Oliver, A. J. Weinstein, E. Cesarini, V. Dolique, A. Chiummo, E. Cuoco, N. Bode, Luca Gammaitoni, J. A. Giaime, B. K. Berger, F. Ohme, P. Clearwater, M. A. Papa, A. S. Bell, M. K. M. Bader, E. J. Fauchon-Jones, A. Brillet, T. Huynh-Dinh, M. Wade, D. J. Stops, P. Kumar, Christopher M. Biwer, S. Frasca, C. Rajan, Kai Staats, S. Meshkov, R. DeSalvo, Stephen Fairhurst, Carl Blair, C. C. Buchanan, A. Hreibi, O. V. Palashov, Sean T. McWilliams, F. Piergiovanni, Chang-Hwan Lee, M. Davier, M. Was, R. Robie, M. M. Hanke, Jordan Camp, P. Popolizio, Koji Arai, K. Lee, Edward K. Porter, H. Vocca, Christopher P. L. Berry, A. D. Silva, A. Grant, Eugeniy E. Mikhailov, A. A. Shah, M. Merzougui, L. Matone, A. Staley, Lionel London, S. Jawahar, V. Loriette, L. Conti, A. L. Stuver, Matthew Evans, T. D. Creighton, J. G. Rollins, E. J. Sanchez, Steven Reyes, J. McIver, Archana Pai, F. Paoletti, Laura Sampson, James G. Bartlett, T. J. N. Nelson, D. Schuette, D. H. Shoemaker, J. Junker, James Healy, Roy Williams, Mairi Sakellariadou, Richard O'Shaughnessy, B. Barr, A. Rüdiger, O. de Varona, Leo Tsukada, W. Z. Korth, E. Z. Hamilton, Tenglin Li, C. Buy, G. D. O'Dea, I. Kowalska, H. Overmier, Swetha Bhagwat, J. Scott, A. Ain, E. Maros, W. G. Anderson, G. Cella, Richard J. Abbott, Marie-Anne Bizouard, B. P. Abbott, E. K. Gustafson, R. Coyne, Fabrice Matichard, E. K. Wessel, Nergis Mavalvala, Jerome Degallaix, C. Casentini, Ben Farr, Christophe Collette, Ho-Gyu Lee, C. J. Perez, N. Gehrels, C.-J. Haster, O. Halim, J. A. Taylor, K. W. Tsang, M. Rakhmanov, Ik Siong Heng, T. Souradeep, E. Mejuto-Villa, J. Page, M. Boer, A. L. Miller, Mingliang Zhou, P. Astone, Larne Pekowsky, S. D'Antonio, H. Fehrmann, W. Ren, Benjamin William Allen, Mandar Patil, Abhirup Ghosh, Karsten Danzmann, Hua Wang, Slawomir Gras, C. Krämer, Denis Martynov, Marco Bazzan, A. Kutynia, F. Salemi, Federico Ferrini, Lijing Shao, G. Vajente, S. M. Gaebel, P. Raffai, M. C. Edwards, Angela Delli Paoli, S. Ascenzi, D. Mukherjee, Alessandro Bertolini, Miftar Ganija, Laleh Sadeghian, R. C. Walet, V. P. Mitrofanov, D. Huet, S. H. Huttner, M. C. Araya, F. Cleva, Andrew Melatos, M. Lorenzini, W. Del Pozzo, P. F. Cohadon, H. Heitmann, Mark Hannam, R. L. McCarthy, C. R. Billman, Tanja Hinderer, A. Strunk, R. L. Savage, M. P. Ross, Maximiliano Isi, V. Sequino, Lionel Martellini, E. M. Gretarsson, Peter Fritschel, D. J. McManus, M. Masso-Reid, Yu Zhang, L. E. Sanchez, J. R. Palamos, Enrico Calloni, Thomas Corbitt, L. Salconi, Jacob Broida, M. K. Gupta, D. V. Atallah, Laura Cadonati, A. Perreca, Daniel R. George, S. McCormick, Susan M. Scott, I. Khan, Y. Wang, Q. Chu, G. Wang, C. E. Cirelli, L. E. Wade, Chad Hanna, M. Pirello, A. K. Srivastava, T. B. Edo, Haocun Yu, F. Clara, S. V. Angelova, L. Magaña Zertuche, Lili Yang, M. Branchesi, S. Chua, Fiodor Sorrentino, J. C. Batch, E. Massera, R. Inta, Alicia M. Sintes, Edward Seidel, M. Ast, T. Zhang, Thibaut Jacqmin, J. Woehler, M. Prijatelj, E. M. Fries, S. Klimenko, D. Passuello, D. B. Kozak, Douglas Davis, Geraint Pratten, H. Fair, G. Bogaert, Andrea Taracchini, B. Agarwal, Eric Thrane, J. B. Kanner, Walter Winkler, Chunnong Zhao, C. Michel, D. Finstad, Harald Lück, S. Rieger, L. Nevin, L. Kuo, D. Verkindt, Sarah Caudill, T. D. Knowles, M. Cho, H. Radkins, V. B. Adya, G. Gaur, S. Di Pace, E. Genin, J. V. van Heijningen, I. Maksimovic, R. L. Ward, G. Hemming, M. Pichot, C. Palomba, S. M. Koehlenbeck, A. Ananyeva, S. Karki, S. P. Vyatchanin, V. Dattilo, M. Brinkmann, Z. Márka, Stefan Hild, J. Schmidt, P. Couvares, R. Tso, Patrick M. Koch, S. Banagiri, F. Garufi, Surendra Nadh Somala, D. Bersanetti, Tomasz Bulik, D. Fiorucci, Richard J. Oram, V. V. Frolov, François Bondu, Britton D. Smith, J. Oberling, A. C. Green, Fausto Acernese, Tyson Littenberg, Mi Zhang, C. Gray, G. H. Ogin, M. Mantovani, G. Gemme, D. Pascucci, C. Bradaschia, K. Bossie, S. Vass, T. Dal Canton, Leopoldo Milano, S. G. Crowder, L. Rolland, N. Indik, Fabrizio Barone, M. Mohan, Mark Thomas, N. Man, J. Worden, David A. Williams, I. W. Harry, C. M. Mow-Lowry, K. Haughian, A. R. Wade, S. Chung, D. C. Vander-Hyde, E. E. Cowan, J. D. Romano, J. Casanueva Diaz, C. Van Den Broeck, Nicolas Sanchis-Gual, Michael E Zucker, B. D. Lackey, B. L. Swinkels, Kipp Cannon, M. Steinke, A. Mullavey, F. Magaña-Sandoval, P. Puppo, A. W. Muir, E. A. Huerta, M. C. Heintze, R. Goetz, C. L. Romel, M. Lormand, M. A. Okada, P. Thomas, Shubhanshu Tiwari, Ettore Majorana, Paul M. Ricker, M. Bitossi, K. Wette, F. Thies, John J. Oh, Timothy Evans, Rory Smith, C. Adams, D. Sigg, S. W. Ballmer, D. M. Shoemaker, Michelle E. Walker, J. George, G. Moreno, D. Rosińska, S. E. Gossan, Patrice Hello, K. Holt, Kevin Barkett, I. Dorrington, I. Di Palma, Collin D. Capano, M. B. Shaner, V. Fafone, Jessica Steinlechner, A. Neunzert, T. Chmiel, M. Heurs, C. Dreissigacker, J-Y. Vinet, Reed Essick, S. Kandhasamy, B. Sorazu, T. T. Nguyen, Andrea Chincarini, Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux (ARTEMIS), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China (IMP), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), The Open University [Milton Keynes] (OU), State Key Laboratory of Marine Geology [Shanghai], Tongji University, Institut des Hautes Etudes Scientifiques (IHES), IHES, University of Malaya, MEMS CORE Co, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Center for Neuroendocrinology, University of Otago [Dunedin, Nouvelle-Zélande], Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Albert Einstein Institute, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Department of Physics, Columbia University [New York], Université Libre de Bruxelles [Bruxelles] (ULB), Department of Environmental Science and Analytical Chemistry [Stockholm] (ACES), Stockholm University, Association de Coordination Technique Agricole (ACTA), Department of Astrophysics [Nijmegen], Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud university [Nijmegen]-Radboud university [Nijmegen], LAboratoire de REcherche en Géodésie [Paris] (LAREG), Laboratoire des Sciences et Technologies de l'Information Géographique (LaSTIG), École nationale des sciences géographiques (ENSG), Institut National de l'Information Géographique et Forestière [IGN] (IGN)-Institut National de l'Information Géographique et Forestière [IGN] (IGN)-École nationale des sciences géographiques (ENSG), Institut National de l'Information Géographique et Forestière [IGN] (IGN)-Institut National de l'Information Géographique et Forestière [IGN] (IGN), Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry, University of Alberta, University of Alberta, Physics Department, University of Massachusetts System (UMASS), Département de Physique, Universita degli studi di Genova, Department of Chemical Engineering, Facultad de Ciencias Quimicas, CSSAR, Chinese Academy of Sciences [Beijing] (CAS), Department of Chemistry [West Bengal], Kalyani University, UMR CNRS 8179, Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS), Department of Physics and Astronomy [Northfield], Carleton College, Centre de résonance magnétique biologique et médicale (CRMBM), Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)-Centre National de la Recherche Scientifique (CNRS), Cités, Territoires, Environnement et Sociétés (CITERES), Université de Tours-Centre National de la Recherche Scientifique (CNRS), European Organization for Nuclear Research (CERN), Department of Physiology and Pharmacology, Università degli Studi di Roma 'La Sapienza' [Rome]-Réseau International des Instituts Pasteur (RIIP)-Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, Réseau International des Instituts Pasteur (RIIP), LIGO Laboratory, California Institute of Technology (CALTECH), Vitrociset S.p.a., Department of Physics [Parma], University of Parma, Albert-Einstein-Institut, Max-Planck-Institut, Department of Mathematics [Berkeley], University of California [Berkeley], University of California-University of California, Istituto Nazionale di Fisica Nucleare, Sezione di Genova (INFN, Sezione di Genova), National Institute for Nuclear Physics (INFN), Institute of Marine Sciences / Institut de Ciències del Mar [Barcelona] (ICM), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Dipartimento di Fisica, Università 'La Sapienza', Università degli Studi di Roma 'La Sapienza' [Rome], Institut de Mécanique des Fluides et des Solides (IMFS), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire des Matériaux Inorganiques (LMI), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Clermont Université-Sigma CLERMONT (Sigma CLERMONT)-Centre National de la Recherche Scientifique (CNRS), Ecosystèmes forestiers (UR EFNO), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Polymer-Institut, University of Karlsruhe, University of Karlsruhe (TH), Los Gatos Res Inc, Los, Paul-Drude-Institut für Festkörperelektronik, Istituto Nazionale di Fisica Nucleare, Sezione di Firenze (INFN, Sezione di Firenze), Laboratoire Kastler Brossel (LKB (Lhomond)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), University of Minnesota, University of Minnesota [Twin Cities], University of Minnesota System-University of Minnesota System, Virgo, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), JIFRESSE, University of California [Los Angeles] (UCLA), Civil and Environmental Engineering (CEE), University of Illinois at Urbana-Champaign [Urbana], University of Illinois System-University of Illinois System, Bhabha Atomic Research Center (BARC), Government of India, Department of Atomic Energy, ArcelorMittal Maizières Research SA, ArcelorMittal, Universidade Federal do Rio Grande do Sul [Porto Alegre] (UFRGS), ESPCI ParisTech, Imaging Sciences and Biomedical Engineering Division [London], Guy's and St Thomas' Hospital [London]-King‘s College London, Istituto di Fisica dello Spazio Interplanetario (IFSI), Consiglio Nazionale delle Ricerche (CNR), Ecosystèmes méditerranéens et risques (UR EMAX), School of Environmental Sciences, University of Ulster, Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institute of Climate System, Chinese Academy of Meteorological Sciences (CAMS), Forestry School, University of Extremadura, Plasencia, Universidad de Extremadura (UEX), Photonics and photonic materials group, Departement of Physics, University of bath, University of Bath [Bath], Laboratoire de Mesures et Modélisation de la Migration des Radionucléides (L3MR), Service d'Etudes du Comportement des Radionucléides (SECR), Département de Physico-Chimie (DPC), CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction de l'Energie Nucléaire (CEA-DEN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département de Physico-Chimie (DPC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Océan du Large et Variabilité Climatique (OLVAC), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Department of Biomedical Sciences, Universita degli Studi di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Catania (INFN), Università degli studi di Catania [Catania], Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Istituto IMEM-CNR, Istituto dei Materiali per l'Elettronica ed il Magnetismo - Consiglio Nazionale delle Ricerche [Genova] (IMEM-CNR), Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, Department of Physics Department [Fayetteville], University of Arkansas [Fayetteville], Politecnico di Torino [Torino] (Polito), SensorDynamics AG, Université Nice Sophia Antipolis (UNS), State Key Lab Marine Geology, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), University of Otago, AstroParticule et Cosmologie (APC - UMR 7164), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Association de Coordination Technique Agricole, LAboratoire de REcherche en Géodésie [Paris] (LAREG/IGN), Institut National de l'Information Géographique et Forestière [IGN] (IGN), University of Massachusetts, Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), University of Minnesota [Minneapolis], University of California at Los Angeles [Los Angeles] (UCLA), Istituto Nazionale di Astrofisica (INAF), Universidad de Extremadura, Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), OLVAC LEGOS, Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Etudes Spatiales (CNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UPS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Etudes Spatiales (CNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP)-Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut des Hautes Études Scientifiques (IHES), University of Malaya = Universiti Malaya [Kuala Lumpur, Malaisie] (UM), Laboratoire d'Annecy de Physique des Particules (LAPP), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Max Planck Institute for Gravitational Physics (Albert Einstein Institute) (AEI), Max-Planck-Gesellschaft, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Université libre de Bruxelles (ULB), Les instituts techniques agricoles (Acta), Radboud University [Nijmegen]-Radboud University [Nijmegen], Università degli studi di Genova = University of Genoa (UniGe), The University of Western Australia (UWA), Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Università degli studi di Parma = University of Parma (UNIPR), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Istituto Nazionale di Fisica Nucleare (INFN), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Clermont Université-SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), European gravitational Observatory (EGO), Istituto Nazionale di Fisica Nucleare (INFN)-Centre National de la Recherche Scientifique (CNRS), Paul-Drude-Institut für Festkörperelektronik (PDI), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), University of Minnesota System, Civil and Environmental Engineering [Illinois] (CEE), Bhabha Atomic Research Centre (BARC), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut ) (AEI), Universidad de Extremadura - University of Extremadura (UEX), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Padova = University of Padua (Unipd), Università degli studi di Catania = University of Catania (Unict), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Istituto dei Materiali per l'Elettronica ed il Magnetismo [Genova] (IMEM-CNR), Politecnico di Torino = Polytechnic of Turin (Polito), LIGO Scientific Collaboration, Virgo Collaboration, Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD), Centre National de la Recherche Scientifique (CNRS)-Université de Lille, Sciences et Technologies, Centre National de la Recherche Scientifique (CNRS)-Université de Tours (UT), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]-Réseau International des Instituts Pasteur (RIIP)-Institut Pasteur, Fondation Cenci Bolognetti - Istituto Pasteur Italia, Fondazione Cenci Bolognetti, University of Parma = Università degli studi di Parma [Parme, Italie], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), The LIGO Scientific Collaboration, The Virgo Collaboration, (Astro)-Particles Physics, Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allen, G., Allocca, A., Altin, P. A., Amato, A., Ananyeva, A., Anderson, S. B., Anderson, W. G., Angelova, S. V., Antier, S., Appert, S., Arai, K., Araya, M. C., Areeda, J. S., Arnaud, N., Ascenzi, S., Ashton, G., Ast, M., Aston, S. M., Astone, P., Atallah, D. V., Aufmuth, P., Aulbert, C., Aultoneal, K., Austin, C., Avila-Alvarez, A., Babak, S., Bacon, P., Bader, M. K. M., Bae, S., Baker, P. T., Baldaccini, F., Ballardin, G., Ballmer, S. W., Banagiri, S., Barayoga, J. C., Barclay, S. E., Barish, B. C., Barker, D., Barkett, K., Barone, F., Barr, B., Barsotti, L., Barsuglia, M., Barta, D., Bartlett, J., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bawaj, M., Bayley, J. C., Bazzan, M., Bécsy, B., Beer, C., Bejger, M., Belahcene, I., Bell, A. S., Berger, B. K., Bergmann, G., Bero, J. J., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Bhagwat, S., Bhandare, R., Bilenko, I. A., Billingsley, G., Billman, C. R., Birch, J., Birney, R., Birnholtz, O., Biscans, S., Biscoveanu, S., Bisht, A., Bitossi, M., Biwer, C., Bizouard, M. A., Blackburn, J. K., Blackman, J., Blair, C. D., Blair, D. G., Blair, R. M., Bloemen, S., Bock, O., Bode, N., Boer, M., Bogaert, G., Bohe, A., Bondu, F., Bonilla, E., Bonnand, R., Boom, B. A., Bork, R., Boschi, V., Bose, S., Bossie, K., Bouffanais, Y., Bozzi, A., Bradaschia, C., Brady, P. R., Branchesi, M., Brau, J. E., Briant, T., Brillet, A., Brinkmann, M., Brisson, V., Brockill, P., Broida, J. E., Brooks, A. F., Brown, D. A., Brown, D. D., Brunett, S., Buchanan, C. C., Buikema, A., Bulik, T., Bulten, H. J., Buonanno, A., Buskulic, D., Buy, C., Byer, R. 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E., Zweizig, J., COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), Centre National de la Recherche Scientifique (CNRS)-Université de Tours, and Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome]
Subjects: Astronomy, Testing, detection, General Physics and Astronomy, EFFICIENT, TESTING RELATIVISTIC GRAVITY, Tensors, Spectral shapes, 01 natural sciences, General Relativity and Quantum Cosmology, Gravitational wave background, Energy density, TOOL, QC, ComputingMilieux_MISCELLANEOUS, stochastic model, Mathematical physics, QB, Physics, [PHYS]Physics [physics], Stochastic systems, Gravitational effects, article, Vectors, Polarization (waves), gravitational waves, astro-ph.CO, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity, Cosmology and Nongalactic Astrophysics (astro-ph.CO), General relativity, gr-qc, FOS: Physical sciences, experimental studies of gravity, General Relativity and Quantum Cosmology (gr-qc), Gravity waves, Relativity, Reference frequency, Physics and Astronomy (all), Theory of relativity, Scalar modes, Tests of general relativity, 0103 physical sciences, Advanced LIGO, ddc:530, Tensor, 010306 general physics, STFC, Gravitational Waves, polarization, 010308 nuclear & particles physics, Gravitational wave, RCUK, Astrophysical sources, LIGO, Physics and Astronomy, gravitation, RADIATION, Stochastic Background, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], cosmology, Gravitational Waves, Stochastic Background, Advanced LIGO
Abstract: The detection of gravitational waves with Advanced LIGO and Advanced Virgo has enabled novel tests of general relativity, including direct study of the polarization of gravitational waves. While general relativity allows for only two tensor gravitational-wave polarizations, general metric theories can additionally predict two vector and two scalar polarizations. The polarization of gravitational waves is encoded in the spectral shape of the stochastic gravitational-wave background, formed by the superposition of cosmological and individually-unresolved astrophysical sources. Using data recorded by Advanced LIGO during its first observing run, we search for a stochastic background of generically-polarized gravitational waves. We find no evidence for a background of any polarization, and place the first direct bounds on the contributions of vector and scalar polarizations to the stochastic background. Under log-uniform priors for the energy in each polarization, we limit the energy-densities of tensor, vector, and scalar modes at 95% credibility to $\Omega^T_0 < 5.6 \times 10^{-8}$, $\Omega^V_0 < 6.4\times 10^{-8}$, and $\Omega^S_0 < 1.1\times 10^{-7}$ at a reference frequency $f_0 = 25$ Hz., Comment: Minor updates to match published version
Published: 2018
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92. Distinct control mechanism of fine-grained sediments from Yellow River and Kyushu supply in the northern Okinawa Trough since the last glacial

Author: Hanchao Jiang, Yoshimi Kubota, Sidonie Révillon, Xuefa Shi, Xufeng Zheng, Zhaokai Xu, Ryuji Tada, Debo Zhao, Shiming Wan, Peter D. Clift, Zhaojie Yu, Samuel Toucanne, Anchun Li, Jie Huang, Institute of Oceanology [China], Qingdao National Laboratory for Marine Science and Technology, Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China, Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), IFREMER, Unite Rech Geosci Marines, Lab Geophys & Enregistrements Sedimentaires, Plouzane, France., Louisiana State University (LSU), Department of Earth and Planetary Science [Tokyo], The University of Tokyo (UTokyo), Laboratoire Géosciences Océan (LGO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Natl Museum Nat & Sci, Dept Geol, Ibaraki, Japan., Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China., Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing, Peoples R China., Key Laboratory of Marine Geology and Environment [China, SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Peoples R China., State Key Laboratory of Marine Geology [Shanghai], Tongji University, Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Graduate School of Science [Tokyo], and The University of Tokyo (UTokyo)-The University of Tokyo (UTokyo)
Subjects: Provenance, 010504 meteorology & atmospheric sciences, Tsushima Warm Current, Trough (geology), Fluvial, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Yellow River, 010502 geochemistry & geophysics, 01 natural sciences, chemistry.chemical_compound, Okinawa Trough, Geochemistry and Petrology, River mouth, 14. Life underwater, Glacial period, 0105 earth and related environmental sciences, Kyushu Island, geography, geography.geographical_feature_category, clay-sized sediments, Sediment, Silicate, sea-level change, Geophysics, Oceanography, chemistry, 13. Climate action, [SDU]Sciences of the Universe [physics], Kuroshio Current, Sediment transport, Geology
Abstract: High-resolution multi-proxy records, including clay minerals and Sr-Nd-Pb isotopes of the clay-sized silicate fraction of sediments from IODP Site U1429 in the northern Okinawa Trough, provide reliable evidence for distinct control mechanism on fine-grained sediments input from the Yellow River and the southern Japanese Islands to the northern Okinawa Trough since 34 ka BP. Provenance analysis indicates that the sediments were mainly derived from the Yellow River and the island of Kyushu. Since the last glacial, clay-sized sediments transported from the Yellow River to the study site were strongly influenced by sea-level fluctuation. During low sea-level stage (∼34‒14 ka BP), the paleo-Yellow River mouth was positioned closer to the northern Okinawa Trough, favoring large fluvial discharge or even direct input of detrital sediments, which resulted about four times more flux of clay-sized sediments supply to the study area as during the relatively high sea-level stage (∼14‒0 ka BP). The input of Kyushu-derived clay-sized sediments to the study site was mainly controlled by the Kuroshio Current and Tsushima Warm Current intensity, with increased input in phase with weakened Kuroshio Current/Tsushima Warm Current. Our study suggests that the Kuroshio Current was very likely flowed into the Okinawa Trough and thus influenced the fine-grained sediment transport in the area throughout the last glacial and deglacial. During ∼34‒11 ka BP, the Kyushu clay-sized sediment input was mainly controlled by the Kuroshio Current. Since ∼11 ka BP, the occurrence of Tsushima Warm Current became important in influencing the Kyushu fine-grained sediment input to the northern Okinawa Trough.
Published: 2017
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93. Yttrium and Rare Earth Elements partitioning in seawaters from the Bay of Bengal

Author: YU, Zhaojie, Colin, Christophe, Douville, Éric, Meynadier, L., Duchamp-Alphonse, S., Sepulcre, S., Wan, S., Song, L., Wu, Qiong, XU, Zhaokai, Bassinot, F., Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochrononologie Traceurs Archéométrie (GEOTRAC), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Key Laboratory of Marine Geology and Environment [China, Institute of Oceanology [China], State Key Laboratory of Marine Geology [Shanghai], Tongji University, Paléocéanographie (PALEOCEAN), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU]Sciences of the Universe [physics]
Abstract: International audience; The dissolved yttrium (Y) and rare earth element (REE) concentrations of seawater samples collected along a north-south hydrological transect within the Bay of Bengal (BoB) have been analyzed to estimate contributions of the Ganges and Brahmaputra (G-B) river inputs to the dissolved REE distribution of the Northern Indian Ocean. Surface water masses of the BoB are characterized by Y/Ho ratios (84) intermediate between the G-B river suspended sediment (41) and water mass from the South Indian Ocean (93). Covariation of MREE (middle REE, Sm) and LREE (light REE, La) concentrations suggests that the dissolved REEs in surface waters (upper 100 m depth) of the BoB (Sm/La = 0.21) appear to derive mainly from the freshwater discharge of the G-B river system. In contrast, values obtained in the intermediate and deep waters (Sm/La = 0.14) suggest a mixing of dissolved REEs deriving from the release of G-B river suspended particles (Sm/La = 0.16) and the contribution of Antarctic Bottom Water (AABW) (Sm/La = 0.12). Consequently, we propose that MREE/MREE* ratios in the BoB waters could be an accurate proxy to trace lithogenic inputs from the G-B river system. The dissolved and particle remineralization Nd fluxes from G-B river system are calculated to constitute about 9% and 4% of the global dissolved river discharge and “boundary inputs” flux. Our estimation indicates that the massive G-B river system inputs could greatly alter the dissolved REEs distribution in the BoB and contribute to the dissolved REEs budget in the ocean.
Published: 2017
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94. Seismic stratigraphy of the late Quaternary sedimentary infill of Lac d'Armor (Kerguelen archipelago): a record of glacier retreat, sedimentary mass wasting and southern Westerly intensification

Author: Katrien Heirman, Fabien Arnaud, Marc De Batist, Jacques-Louis de Beaulieu, Renard Centre of Marine Geology, RCMG, Royal Belgian Institute of Natural Science, Geological Survey of Belgium, Renard Centre of Marine Geology (RCMG), Universiteit Gent = Ghent University [Belgium] (UGENT), Environnements, Dynamiques et Territoires de la Montagne (EDYTEM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), and Environnements, Dynamiques et Territoires de Montagne (EDYTEM)
Subjects: 010504 meteorology & atmospheric sciences, Mass wasting, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Paleontology, Wind-driven currents, drift deposit, Deglaciation, lacustrine sedimentation, 14. Life underwater, Geomorphology, Ecology, Evolution, Behavior and Systematics, Holocene, 0105 earth and related environmental sciences, geography, geography.geographical_feature_category, Geology, Westerlies, Lacustrine sedimentation, Facies, Archipelago, wind-driven currents, Sedimentary rock, Quaternary, glacial sedimentation, Glacial sedimentation
Abstract: Lac d'Armor (49°27′S, 69°42′E) is a medium-sized, fjord-type lake located on the ‘Grande Terre’ island of the Kerguelen archipelago. A dense grid of high-resolution reflection seismic profiles was collected from this lake basin. The seismic stratigraphic facies reveal a last deglaciation to Holocene infill comparable to the seismic facies found in other glacigenic lakes all over the world. Remarkable features in the seismic stratigraphy are mounded structures found at the southern edge of both sub-basins. The sediment mounds can be interpreted as sediment drifts created by wind-induced bottom currents. The onset of the build-up of these drifts initiated at some point in the Holocene and indicates a strengthening of the southern Westerlies, which are currently the dominant winds on this island.
Published: 2012
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95. Messinian deposits and erosion in northern Tunisia: inferences on Strait of Sicily during the Messinian Salinity Crisis

Author: Jean-Pierre Suc, Serge Ferry, Christian Gorini, Fouad Zargouni, Mihaela Carmen Melinte-Dobrinescu, Georges Clauzon, Anissa Safra, Narjess El Euch-El Koundi, Laboratoire de Géologie Structurale et Appliquée, Faculté des Sciences, Université El Manar, PaleoEnvironnements et PaleobioSphere (PEPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), National Institite of Marine Geology & Geoecology, National Institute for Marine Geology and Geo-ecology (GeoEcoMar ), Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), University of Tunis El Manar, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), and National Institute of Marine Geology and Geo-ecology (GeoEcoMar )
Subjects: Canyon, 010506 paleontology, geography, geography.geographical_feature_category, Evaporite, Outcrop, Geochemistry, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Tectonic phase, Fluvial, Geology, engineering.material, 010502 geochemistry & geophysics, 01 natural sciences, language.human_language, Subaerial, language, engineering, Halite, 14. Life underwater, Sicilian, Geomorphology, 0105 earth and related environmental sciences
Abstract: International audience; Outcrops, offshore wells, electric logs and seismic profiles from northern Tunisia provide an opportunity to decipher the Messinian Salinity Crisis in the Strait of Sicily. Messinian deposits (including gypsum beds) near the Tellian Range reveal two successive subaerial erosional surfaces overlain by breccias and marine Zanclean clays, respectively. In the Gulf of Tunis, Messinian thick evaporites (mostly halite) are strongly eroded by a fluvial canyon infilled with Zanclean clays. The first erosional phase is referred to the intra-Messinian tectonic phase and is analogous to that found in Sicily. The second phase corresponds to the Messinian Erosional Surface that postdates the marginal evaporites, to which the entire Sicilian evaporitic series must refer. The Western and Eastern Mediterranean basins were separated during deposition of the central evaporites.
Published: 2009
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96. Terrigenous provenance of late Oligocene–Miocene sediments in the central basin of the South China Sea and its implications for chemical weathering and climate change

Author: Shu, Wei, Liu, Zhifei, Colin, Christophe, Ma, Pengfei, Huang, Baoqi, Dapoigny, Arnaud, State Key Laboratory of Marine Geology [Shanghai], Tongji University, Géosciences Paris Saclay (GEOPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), School of Earth and Space Sciences [Beijing], Peking University [Beijing], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochrononologie Traceurs Archéométrie (GEOTRAC), and Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU]Sciences of the Universe [physics]
Abstract: International audience
Published: 2023
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97. Major and trace element distributions in manganese nodules and micronodules as well as abyssal clay from the Clarion-Clipperton abyssal plain, Northeast Pacific

Author: V. E. Alexe, O.G. Duliu, S.A. Szobotca, Jacques Moutte, Department of Atomic & Nuclear Physics, University of Bucharest (UniBuc), Geological Institute of Romania, Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation (GENERIC-ENSMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-SPIN, National Institute for Marine Geology and Geo-ecology (GeoEcoMar ), (1) University of Bucharest, and National Institute for Marine Geology and Geoecology
Subjects: Nodule (geology), 010504 meteorology & atmospheric sciences, manganese micronodules, trace elements, Mineralogy, Environmental Science (miscellaneous), engineering.material, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, manganese nodules, Abyssal zone, hydrothermal origin, Earth and Planetary Sciences (miscellaneous), [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, 0105 earth and related environmental sciences, Basalt, geography, geography.geographical_feature_category, abyssal clay, Continental crust, major elements, ICP-AE spectrometry, Trace element, Abyssal plain, Sediment, Geotechnical Engineering and Engineering Geology, Igneous rock, Clarion-Clipperton abyssal plain, 13. Climate action, engineering, Geology
Abstract: International audience; The contents of seven major components (TiO2, Fe2O3, MgO, CaO, Na2O, K2O and P2O5) and 15 trace elements (Sc, V, Cr, Ni, Cu, Sr, Y, Zr, Ba, La, Ce, Nd, Eu, Yb and Th) were determined by ICP-AE spectrometry in 27 samples of manganese nodules, micronodules as well as abyssal clay collected by dredging from an area of nearly 1,9802 nautical miles in the central Clarion-Clipperton abyssal plain at a depth of about 4,500 m. Statistical analyses were used to compare among individual as well as pooled datasets, in addition to different indicators such as La/Th, Ni/Cu and LREE/HREE ratios for the Clarion-Clipperton samples, as well as between these and corresponding values for the upper continental crust (UCC), North America Shale Composite (NASC), and igneous Indian and Pacific Mid-Ocean Ridge Basalts (MORBs). The results show significant correlations between major components in the Clarion-Clipperton samples and Pacific Ocean MORB, whereas trace elements (excepting Ni and Cu) correlate better with the UCC and NASC. There is also depletion in LREEs, together with a Ce negative anomaly for all Clarion-Clipperton samples. The nodule, micronodule and abyssal clay datasets each reveal typical clusters of components such as P2O5 and Y, La, Nd, Eu, Tb, or Ni and Cu. Compared to abyssal clay, the nodule as well as micronodules show significant enrichment in Ni and Cu; nevertheless, an essentially constant Ni/Cu ratio indicates that all samples come from the sediment surface. The distributions of major components as well as trace elements for the Clarion-Clipperton samples present, to different degrees, characteristics common to both the upper continental crust and Mid-Ocean Ridge Basalt, strongly implying a hydrothermal origin, most probably from East Pacific Rise material transported by the Pacific North Equatorial Current.
Published: 2008
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98. Co-evolution of monsoonal precipitation in East Asia and the tropical Pacific ENSO system since 2.36 Ma: new insights from high-resolution clay mineral records in the West Philippine Sea

Author: YU, Zhaojie, Wan, S., Colin, C., Yan, H., Bonneau, L., Liu, Z., Song, L., Sun, H., Xu, Z., Jiang, X., Li, A., Li, T., Institute of Oceanology [China], Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratory for Marine Geology, Université Paris Diderot - Paris 7 (UPD7), State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), State Key Laboratory of Marine Geology [Shanghai], Tongji University, Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China, Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China, and Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU]Sciences of the Universe [physics]
Abstract: International audience; Clay mineralogical analysis and scanning electron microscope (SEM) analysis were performed on deep-sea sediments cored on the Benham Rise (core MD06-3050) in order to reconstruct long-term evolution of East Asian Summer Monsoon (EASM) rainfall in the period since 2.36 Ma. Clay mineralogical variations are due to changes in the ratios of smectite, which derive from weathering of volcanic rocks in Luzon Island during intervals of intensive monsoon rainfall, and illite- and chlorite-rich dusts, which are transported from East Asia by winds associated with the East Asian Winter Monsoon (EAWM). Since Luzon is the main source of smectite to the Benham Rise, long-term consistent variations in the smectite/(illite + chlorite) ratio in core MD06-3050 as well as ODP site 1146 in the Northern South China Sea suggest that minor contributions of eolian dust played a role in the variability of this mineralogical ratio and indicate strengthening EASM precipitation in SE Asia during time intervals from 2360 to 1900 kyr, 1200 to 600 kyr, and after 200 kyr. The EASM rainfall record displays a 30 kyr periodicity suggesting the influence of El Niño–Southern Oscillation (ENSO). These intervals of rainfall intensification on Luzon Island are coeval with a reduction in precipitation over central China and an increase in zonal SST gradient in the equatorial Pacific Ocean, implying a reinforcement of La Niña-like conditions. In contrast, periods of reduced rainfall on Luzon Island are associated with higher precipitation in central China and a weakening zonal SST gradient in the equatorial Pacific Ocean, thereby suggesting the development of dominant El Niño-like conditions. Our study, therefore, highlights for the first time a long-term temporal and spatial co-evolution of monsoonal precipitation in East Asia and of the tropical Pacific ENSO system over the past 2.36 Ma.
Published: 2016

99. Unravelling megaturbidite deposition: Evidence for turbidite stacking/amalgamation and seiche influence during the 1601 <scp>ce</scp> earthquake at Lake Lucerne, Switzerland

Author: Flor Vermassen, Maarten Van Daele, Nore Praet, Veerle Cnudde, Catherine Kissel, Flavio S. Anselmetti, Department of Geological Sciences [Stockholm], Stockholm University, Renard Centre of Marine Geology (RCMG), Universiteit Gent = Ghent University (UGENT), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Climat et Magnétisme (CLIMAG), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Oeschger Centre for Climate Change Research (OCCR), University of Bern, Hydrogeology, and Environmental hydrogeology
Subjects: Earthquake, Stratigraphy, seiche, Earthquake lake sediment megaturbidite paleoseismology seiche turbidites, Geology, megaturbidite, 000 Computer science, knowledge & systems, lake sediment, [SDU]Sciences of the Universe [physics], 550 Earth sciences & geology, General Earth and Planetary Sciences, paleoseismology, General Environmental Science, turbidites
Abstract: Megaturbidites are commonly used to reconstruct the seismic history (palaeo- seismology) of areas where large earthquakes occur. However, the depositional mechanisms and sedimentary characteristics of these deposits are not yet fully understood. This study unravels the sequence of sediment deposition that occurred in Lake Lucerne (Vitznau Basin) following the 1601 CE earthquake in central Switzerland. During this event, slope failures were triggered, generat- ing mass flows and turbidity currents that led to the formation of mass- transport deposits and a megaturbidite. These deposits are sampled in 28 sed- iment cores, which are examined with X-ray computed tomography scans (medical and lCT), grain-size analysis and natural remanent magnetisation. This suite of analyses allows a detailed reconstruction of turbidite stacking and amalgamation in the centre of the basin, followed by settling of finer sedi- ments influenced by a lake seiche. Initial deposition of mass-transport deposits is followed by sandy turbidites reaching the depocentre. Some of these turbidite sands can be linked to their source areas, and evidence is found of some turbidites being overridden by mass flows in the peripheral parts of the megaturbidite deposit. Hereafter, sedimentation becomes con- trolled by seiche-induced currents, which rework fine sediments upon deposi- tion, leading to subtle grain-size variations at the base of the seiche- influenced sub-unit and a ponded geometry of the megaturbidite. As the seiche movement dampens, a relatively muddy, homogeneous sub-unit is deposited that drapes the basin plain. Overall, this study provides the first highly detailed sedimentological analysis of megaturbidite deposition in a lake, demonstrating the distinct sedimentological imprint of lake seiching and turbidite amalgamation/stacking. This will improve the recognition and inter- pretation of earthquake-induced megaturbidites in other lake records or iso- lated basins, and demonstrates the value of using (l)CT scans in combination with traditional sedimentological parameters to reconstruct the depositional processes of megaturbidites.
Published: 2023
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100. Atmospheric forcing dominates winter Barents-Kara sea ice variability on interannual to decadal time scales

Author: Zhongfang Liu, Camille Risi, Francis Codron, Zhimin Jian, Zhongwang Wei, Xiaogang He, Christopher J. Poulsen, Yue Wang, Dong Chen, Wentao Ma, Yanyan Cheng, Gabriel J. Bowen, State Key Laboratory of Marine Geology [Shanghai], Tongji University, Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Océan et variabilité du climat (VARCLIM), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Department of Civil and Environmental Engineering [Singapore], National University of Singapore (NUS), Department of Earth and Environmental Sciences [Ann Arbor], University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Nansen-Zhu International Research Centre, Institute of Atmospheric Physics [Beijing] (IAP), Chinese Academy of Sciences [Beijing] (CAS)-Chinese Academy of Sciences [Beijing] (CAS), State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Department of Geology and Geophysics, and University of Utah
Subjects: Multidisciplinary, [SDU]Sciences of the Universe [physics], Arctic Regions, Atmosphere, Climate, Oceans and Seas, Ice Cover, Seasons, Time
Abstract: The last two decades have seen a dramatic decline and strong year-to-year variability in Arctic winter sea ice, especially in the Barents-Kara Sea (BKS), changes that have been linked to extreme midlatitude weather and climate. It has been suggested that these changes in winter sea ice arise largely from a combined effect of oceanic and atmospheric processes, but the relative importance of these processes is not well established. Here, we explore the role of atmospheric circulation patterns on BKS winter sea ice variability and trends using observations and climate model simulations. We find that BKS winter sea ice variability is primarily driven by a strong anticyclonic anomaly over the region, which explains more than 50% of the interannual variability in BKS sea-ice concentration (SIC). Recent intensification of the anticyclonic anomaly has warmed and moistened the lower atmosphere in the BKS by poleward transport of moist-static energy and local processes, resulting in an increase in downwelling longwave radiation. Our results demonstrate that the observed BKS winter sea-ice variability is primarily driven by atmospheric, rather than oceanic, processes and suggest a persistent role of atmospheric forcing in future Arctic winter sea ice loss.
Published: 2023
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