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Your search keyword '"Graeme R. Burton"' showing total 3 results
Start Over Author "Graeme R. Burton" Topic [sdu.stu.gl]sciences of the universe [physics]/earth sciences/glaciology
3 results on '"Graeme R. Burton"'

1. The impact of climatic conditions on Pb and Sr isotopic ratios found in Greenland ice, 7–150 ky BP

Author

Jean-Pierre Candelone, Kevin J.R. Rosman, Sungmin Hong, Graeme R. Burton, Laurie J. Burn, Claude F. Boutron, Department of Applied Physics, Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Unité de Formation et de Recherche de Physique, Université Joseph Fourier - Grenoble 1 (UJF), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Korean Ocean Research and Development Institute (KORDI), Korean Ocean Research and development Institute, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)

Subjects
Provenance, 010504 meteorology & atmospheric sciences, δ18O, Greenland, Geochemistry, Climate change, 010502 geochemistry & geophysics, 01 natural sciences, Proxy (climate), Ice core, Geochemistry and Petrology, Earth and Planetary Sciences (miscellaneous), strontium, [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology, Glacial period, 0105 earth and related environmental sciences, lead, Snow, climate change, Geophysics, Oceanography, Greenland ice core project, 13. Climate action, Space and Planetary Science, isotopic ratio, ice core, Geology
Abstract

International audience; We present here a time series of Pb and Sr isotopes in Greenland ice over the last glacial cycle. The data were obtained by analysing the dust contained in small (less than 10 g) aliquots of sections of the GRIP (European Greenland ice core project) ice core. The concentrations of Pb, Ba and Sr vary by large factors of 70, 140 and 75 respectively over this time period and show a significant correlation with δ18O, used as a proxy for temperature. Elemental ratios of Pb, Ba and Sr indicate the provenance of dust is mainly crustal with possible volcanic influences but the contribution from seawater is negligible. The Pb and Sr isotopic ratios change over time and form two distinct groups above and below a temperature corresponding to a δ18O value of − 39‰. While changing elemental concentrations may be explained by changes in wind strengths, the variation in isotopic composition appears to reflect climate induced changes in the source areas of dust deposited in the snow in Greenland. Available source data suggest that dust may originate from the Gobi Desert in central Asia in cooler periods and from glacial sediments adjacent to Greenland in warmer periods.

Published
2007
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2. Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas

Author

Claude F. Boutron, Paolo Gabrielli, Kjr Rosman, Anna Wegner, Clara Turetta, Graeme R. Burton, Paul Vallelonga, Eleonora Balliana, Sungmin Hong, Paolo Cescon, Carlo Barbante, Frank Vanhaecke, Barbara Delmonte, Institute for the Dynamics of Environmental Processes-CNR, Department of Imaging and Applied Physics, Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), School of Earth Sciences and Byrd Polar Research Center, Ohio State University [Columbus] (OSU), Department of Analytical Chemistry, Ghent University [Belgium] (UGENT), Department of Environmental Sciences, University Milano-Bicocca, Department of Bentho-pelagic processes, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Dipartimento di Scienze dell'Ambiente e del Territorio (DISAT), Università degli studi di Milano [Milano], Korea Polar Research Institute (KOPRI), Université Joseph Fourier - Grenoble 1 (UJF), Australian Research Council (DP0345625) , the Antarctic Science Advisory Committee (#1092,2334),Institut Universitaire de France, the Ministere de l'Environnement et de l'Amenagemont du Territoire, the Agence de l'Environnement et de la Maıtrise de l'Energie, the Institut National des Sciences de l'Univers, the Consorzio per l'Attuazione del Programma Nazionale delle Ricerche in Antartide, FWO-Vlaanderen for the financial support under the form of the research projects G.0669.06 and G.0585.06, European Union Marie Curie IIF Fellowship (MIF1-CT-2006-039529, TDICOSO), ANSTO travel stipend to attend INQUA2007, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Universiteit Gent = Ghent University [Belgium] (UGENT), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Università degli Studi di Milano [Milano] (UNIMI), Vallelonga, P, Gabrielli, P, Balliana, E, Wegner, A, Delmonte, B, Turetta, C, Burton, G, Vanhaecke, F, Rosman, K, Hong, S, Boutron, C, Cescon, P, and Barbante, C

Subjects
Archeology, Provenance, 010504 meteorology & atmospheric sciences, lead, barium, ice cores, volcanic activity, GEO/04 - GEOGRAFIA FISICA E GEOMORFOLOGIA, Geochemistry, 010502 geochemistry & geophysics, 01 natural sciences, Isotopic signature, Ice core, Loess, GEO/08 - GEOCHIMICA E VULCANOLOGIA, Settore CHIM/01 - Chimica Analitica, Glacial period, [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology, Southern Hemisphere, Ecology, Evolution, Behavior and Systematics, 0105 earth and related environmental sciences, ANTHROPOGENIC LEAD, Global and Planetary Change, geography, geography.geographical_feature_category, Lead (sea ice), TRACE-ELEMENT, Geology, MASS-SPECTROMETRY, ANTARCTIC ICE, Oceanography, Volcano, 13. Climate action
Abstract

International audience; A record of Pb isotopic compositions and Pb and Ba concentrations are presented for the EPICA Dome C ice core covering the past 220 ky, indicating the characteristics of dust and volcanic Pb deposition in central East Antarctica. Lead isotopic compositions are also reported in a suite of soil and loess samples from the Southern Hemisphere (Australia, Southern Africa, Southern South America, New Zealand, Antarctica) in order to evaluate the provenance of dust present in Antarctic ice. Lead isotopic compositions in Dome C ice support the contention that Southern South America was an important source of dust in Antarctica during the last two glacial maxima, and furthermore suggest occasional dust contributions from local Antarctic sources. The isotopic signature of Pb in Antarctic ice is altered by the presence of volcanic Pb, inhibiting the evaluation of glacial–interglacial changes in dust sources and the evaluation of Australia as a source of dust to Antarctica. Consequently, an accurate evaluation of the predominant source(s) of Antarctic dust can only be obtained from glacial maxima, when dust-Pb concentrations were greatest. These data confirm that volcanic Pb is present throughout Antarctica and is emitted in a physical phase that is free from Ba, while dust Pb is transported within a matrix containing Ba and other crustal elements.

Published
2010
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3. An ultra-clean technique for accurately analysing Pb isotopes and heavy metals at high spatial resolution in ice cores with sub-pg g(-1) Pb concentrations

Author

Kevin J.R. Rosman, Jean-Pierre Candelone, Sungmin Hong, Vin Morgan, Graeme R. Burton, Andrew Smith, Laurie J. Burn, Claude F. Boutron, Carlo Barbante, Paul Vallelonga, Department of Imaging and Applied Physics, Curtin University [Perth], Planning and Transport Research Centre (PATREC)-Planning and Transport Research Centre (PATREC), Environmental Sciences Department, University of Ca’ Foscari [Venice, Italy], Australian Nuclear Science and Technology Organisation (ANSTO), Australian Nuclear Science and Technology Organisation, Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC), Korea Polar Research Institute (KOPRI), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Australian Research Council grant DP0345625 and Antarctic Science Advisory Council grant #2786., Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)

Subjects
010504 meteorology & atmospheric sciences, Resolution (mass spectrometry), chemistry.chemical_element, Mineralogy, 010502 geochemistry & geophysics, 01 natural sciences, Biochemistry, Indium, Analytical Chemistry, Ice core, Isotopes, Environmental Chemistry, [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology, Spectroscopy, Holocene, 0105 earth and related environmental sciences, Isotope, Mass spectrometry, Stable isotope ratio, Lead (sea ice), Ice, Reproducibility of Results, Barium, Contamination, Lead isotopes, chemistry, Lead, 13. Climate action, Ice cores, Antarctica, Environmental Monitoring
Abstract

Measurements of Pb isotope ratios in ice containing sub-pg g(-1) concentrations are easily compromised by contamination, particularly where limited sample is available. Improved techniques are essential if Antarctic ice cores are to be analysed with sufficient spatial resolution to reveal seasonal variations due to climate. This was achieved here by using stainless steel chisels and saws and strict protocols in an ultra-clean cold room to decontaminate and section ice cores. Artificial ice cores, prepared from high purity water were used to develop and refine the procedures and quantify blanks. Ba and In, two other important elements present at pg g(-1) and fg g(-1) concentrations in Polar ice, were also measured. The final blank amounted to 0.2+/-0.2 pg of Pb with (206)Pb/(207)Pb and (208)Pb/(207)Pb ratios of 1.16+/-0.12 and 2.35+/-0.16, respectively, 1.5+/-0.4 pg of Ba and 0.6+/-2.0 fg of In, most of which probably originates from abrasion of the steel saws by the ice. The procedure was demonstrated on a Holocene Antarctic ice core section and was shown to contribute blanks of only approximately 5%, approximately 14% and approximately 0.8% to monthly resolved samples with respective Pb, Ba and In concentrations of 0.12 pg g(-1), 0.3 pg g(-1) and 2.3 fg g(-1). Uncertainties in the Pb isotopic ratio measurements were degraded by only approximately 0.2%.

Published
2008
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