1. Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas
- Author
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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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