5 results on '"Amblas, David"'
Search Results
2. The International Bathymetric Chart of the Arctic Ocean Version 4.0.
- Author
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Jakobsson, Martin, Mayer, Larry A., Bringensparr, Caroline, Castro, Carlos F., Mohammad, Rezwan, Johnson, Paul, Ketter, Tomer, Accettella, Daniela, Amblas, David, An, Lu, Arndt, Jan Erik, Canals, Miquel, Casamor, José Luis, Chauché, Nolwenn, Coakley, Bernard, Danielson, Seth, Demarte, Maurizio, Dickson, Mary-Lynn, Dorschel, Boris, and Dowdeswell, Julian A.
- Subjects
BATHYMETRY ,BATHYMETRIC maps ,MARINE sciences ,OCEAN bottom - Abstract
Bathymetry (seafloor depth), is a critical parameter providing the geospatial context for a multitude of marine scientific studies. Since 1997, the International Bathymetric Chart of the Arctic Ocean (IBCAO) has been the authoritative source of bathymetry for the Arctic Ocean. IBCAO has merged its efforts with the Nippon Foundation-GEBCO-Seabed 2030 Project, with the goal of mapping all of the oceans by 2030. Here we present the latest version (IBCAO Ver. 4.0), with more than twice the resolution (200 × 200 m versus 500 × 500 m) and with individual depth soundings constraining three times more area of the Arctic Ocean (∼19.8% versus 6.7%), than the previous IBCAO Ver. 3.0 released in 2012. Modern multibeam bathymetry comprises ∼14.3% in Ver. 4.0 compared to ∼5.4% in Ver. 3.0. Thus, the new IBCAO Ver. 4.0 has substantially more seafloor morphological information that offers new insights into a range of submarine features and processes; for example, the improved portrayal of Greenland fjords better serves predictive modelling of the fate of the Greenland Ice Sheet. Measurement(s) depth Technology Type(s) digital curation Factor Type(s) geographic location Sample Characteristic - Environment ocean floor Sample Characteristic - Location Arctic Ocean Machine-accessible metadata file describing the reported data: 10.6084/m9.figshare.12369314 [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
3. Bathymetric Extent of Recent Trawl Damage to the Seabed Captured by an ROV Transect in the Alboran Sea.
- Author
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Brennan, Michael L., Canals, Miquel, Coleman, Dwight F., Austin Jr., James A., and Amblas, David
- Subjects
DREDGING (Fisheries) ,TRAWLING -- Environmental aspects ,BATHYMETRY ,BENTHIC ecology ,OCEAN bottom - Abstract
The article offers information on a remotely operated vehicle survey conducted by exploration vessel Nautilus in a submarine canyon in the Alboran Sea to observe the bathymetric extent and intensity of trawling damage. Key observations from the research include the disappearance of signs of benthic activity from areas of heavily trawled sediment, repopulation of benthic fauna in shallower areas, and the different biology exhibited by areas containing trawl scars than those left untouched.
- Published
- 2015
- Full Text
- View/download PDF
4. Influence on present-day coastal dynamics and evolution of a relict subaqueous delta lobe: Sol de Riu lobe, Ebro Delta.
- Author
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Lavoie, Caroline, Jiménez, José A., Canals, Miquel, Lastras, Galderic, De Mol, Ben, Amblas, David, Liquete, Camino, De Batist, Marc, and Hughes Clarke, John E.
- Subjects
- *
BATHYMETRY , *COASTS , *ESTIMATION theory , *OCEAN bottom , *WAVE energy - Abstract
Abstract: We used high-resolution swath-bathymetry data to characterise the morphology of the abandoned subaqueous Sol de Riu delta lobe in the Ebro Delta, Western Mediterranean Sea. This study aims to assess the influence of an abandoned delta lobe on present-day coastal dynamics in a micro-tidal environment. Detailed mapping of the relict Sol de Riu lobe also showed a set of bedforms interpreted as footprints of human activities: seasonal V-shaped depressions on the middle shoreface due to boat anchoring and old trawling marks between 16 and 18m water depth. Estimations of the mobility of bottom sediment showed that the shallowest shoreface (i.e. less than 7 m depth) is the most dynamic part of the relict lobe, while the middle shoreface experienced significant morphological changes since the lobe was abandoned. The deepest shoreface (i.e. water depth in excess of 15m), which corresponds to the front of the lobe, is defined by a very small potential for morphological change. Simulations showed that while the relict lobe does not significantly affect the typical short period waves (Tp ≈4 s) in the study area, it does interfere with the most energetic wave conditions (Tp ≥ 7 s) acting as a shoal leading to the concentration of wave energy along the shoreline northwest of the lobe. The consequence of such modification of the high-energy wave propagation pattern by the relict lobe is an alteration of the wave-induced littoral sediment dynamics with respect to a situation without the lobe. [Copyright &y& Elsevier]
- Published
- 2014
- Full Text
- View/download PDF
5. The International Bathymetric Chart of the Arctic Ocean (IBCAO) Version 4.0
- Author
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Wilhelm Weinrebe, Miquel Canals, M. Wood, Seth L. Danielson, Bernard Coakley, Jongkuk Hong, Roberta Ivaldi, Mark Zimmermann, Alice C. Fremand, Jan Erik Arndt, Eric Rignot, Boris Dorschel, Caroline Bringensparr, Joshua K. Willis, Emily Kane, Yngve Kristoffersen, Giuseppe Masetti, Dana Gallant, Megan M. Prescott, L. An, Romain Millan, Maurizio Demarte, Rezwan Mohammad, Mathieu Morlighem, Nolwenn Chauché, Julian A. Dowdeswell, Paul G. Johnson, Hanne Hodnesdal, Boele R. Kuipers, Simon Dreutter, J. L. Casamor, Ingo Klaucke, T. Ketter, Laura Hehemann, Michele Rebesco, Carlos F. Castro, K. B. Zinglersen, David Amblas, Igor Semiletov, John K. Hall, Mary-Lynn Dickson, Daniela Accettella, Pauline Weatherall, Riko Noormets, Alex J. Tate, Yulia Zarayskaya, Diana Krawczyk, Paola Travaglini, Larry A. Mayer, Martin Jakobsson, Tao Zhang, Isabella Velicogna, Jakobsson, Martin [0000-0002-9033-3559], Castro, Carlos F. [0000-0001-7523-1477], Amblas, David [0000-0002-6248-5512], Canals, Miquel [0000-0001-5267-7601], Danielson, Seth [0000-0002-9191-4363], Dorschel, Boris [0000-0002-3495-5927], Dowdeswell, Julian A. [0000-0003-1369-9482], Fremand, Alice C. [0000-0001-8272-0981], Klaucke, Ingo [0000-0002-2631-6615], Morlighem, Mathieu [0000-0001-5219-1310], Noormets, Riko [0000-0002-2832-386X], Rebesco, Michele [0000-0002-9492-4081], Wood, Michael [0000-0003-3074-7845], Zarayskaya, Yulia [0000-0002-9385-2135], Zhang, Tao [0000-0002-1205-989X], and Apollo - University of Cambridge Repository
- Subjects
Statistics and Probability ,Data Descriptor ,010504 meteorology & atmospheric sciences ,Greenland ice sheet ,Fjord ,Context (language use) ,Library and Information Sciences ,Oceanografia ,010502 geochemistry & geophysics ,Oceanography ,01 natural sciences ,Bathymetric chart ,Education ,Bathymetry ,14. Life underwater ,lcsh:Science ,0105 earth and related environmental sciences ,geography ,geography.geographical_feature_category ,704/2151/215 ,Submarine ,Geomorphology ,Geofísica ,Seafloor spreading ,Computer Science Applications ,The arctic ,Ocean sciences ,Geophysics ,13. Climate action ,704/2151/2809 ,lcsh:Q ,Statistics, Probability and Uncertainty ,data-descriptor ,Geomorfologia ,Geology ,Information Systems ,704/829 - Abstract
Bathymetry (seafloor depth), is a critical parameter providing the geospatial context for a multitude of marine scientific studies. Since 1997, the International Bathymetric Chart of the Arctic Ocean (IBCAO) has been the authoritative source of bathymetry for the Arctic Ocean. IBCAO has merged its efforts with the Nippon Foundation-GEBCO-Seabed 2030 Project, with the goal of mapping all of the oceans by 2030. Here we present the latest version (IBCAO Ver. 4.0), with more than twice the resolution (200 × 200 m versus 500 × 500 m) and with individual depth soundings constraining three times more area of the Arctic Ocean (∼19.8% versus 6.7%), than the previous IBCAO Ver. 3.0 released in 2012. Modern multibeam bathymetry comprises ∼14.3% in Ver. 4.0 compared to ∼5.4% in Ver. 3.0. Thus, the new IBCAO Ver. 4.0 has substantially more seafloor morphological information that offers new insights into a range of submarine features and processes; for example, the improved portrayal of Greenland fjords better serves predictive modelling of the fate of the Greenland Ice Sheet., Measurement(s)depthTechnology Type(s)digital curationFactor Type(s)geographic locationSample Characteristic - Environmentocean floorSample Characteristic - LocationArctic Ocean Machine-accessible metadata file describing the reported data: 10.6084/m9.figshare.12369314
- Published
- 2020
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