http://www.cnr.it/ontology/cnr/individuo/prodotto/ID20318
Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas. (Articolo in rivista)
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- Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas. (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
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- Vallelonga P.; Gabrielli P.; Balliana E.; Wegner A.; Delmonte B.; Turetta C.; Burton G.; Vanhaecke F.; Rosman K.J.R.; Hong S.; Boutron C.F.; Cescon P.; Barbante C. (literal)
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- Scopus (literal)
- ISI Web of Science (WOS) (literal)
- Science direct - Elsevier (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Institute for the Dynamics of Environmental Processes - CNR, Calle Larga Santa Marta 2137, I-30123 Venice, Italy;
Department of Imaging and Applied Physics, Curtin University of Technology, GPO Box U1987, Perth, WA 6845, Australia;
School of Earth Sciences and Byrd Polar Research Center, The Ohio State University, 108 Scott Hall, 1090 Carmack Road, Columbus, OH 43210-1002, USA;
Department of Analytical Chemistry, Ghent University, Krijgslaan 281-S12, B-9000 Ghent, Belgium;
Department of Environmental Sciences, University of Venice Ca' Foscari, Calle Larga Santa Marta 2137, I-30123 Venice, Italy;
Alfred-Wegener-Institut, Am Alten Hafen 26, D-27568 Bremerhaven, Germany;
Dipartimento di Scienze dell'Ambiente e del Territorio, Universita´ degli Studi di Milano-Bicocca, Piazza della Scienza 1, 20126, Milan, Italy;
Korea Polar Research Institute (KOPRI), 806 Get-Pearl Tower, Songdo Technopark, 7-50 Songdo-dong, Yunsu-ku, Incheon, 406-840, Korea;
Laboratoire de Glaciologie et Ge´ophysique de l'Environnement du C.N.R.S., 54 rue Molie`re - Domaine Universitaire - BP 96 - 38402 St Martin d'He`res Cedex, France;
Universite´ Joseph Fourier de Grenoble (Institut Universitaire de France), B.P. 68, 38041 Grenoble, France (literal)
- Titolo
- Lead isotopic compositions in the EPICA Dome C ice core and Southern Hemisphere Potential Source Areas. (literal)
- Abstract
- 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. (literal)
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