A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap
International audience Meteoric smoke particles (MSPs) form through the vaporization of meteoroids and the subsequent re-condensation of metallic species in the mesosphere. Recently, iridium and platinum enrichments have been identified in Greenland ice layers and attributed to the fallout of MSPs s...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2006
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00375474 https://doi.org/10.1016/j.epsl.2006.08.015 |
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ftunivnantes:oai:HAL:insu-00375474v1 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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language |
English |
topic |
iridium platinum meteoric smoke ice Antarctica climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
iridium platinum meteoric smoke ice Antarctica climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Gabrielli, Paolo M.C. Plane, John F. Boutron, Claude Hong, Sungmin Cozzi, Giulio Cescon, Paolo Ferrari, Christophe, J. Crutzen, Paul Robert Petit, Jean Y. Lipenkov, Vladimir Barbante, Carlo A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap |
topic_facet |
iridium platinum meteoric smoke ice Antarctica climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Meteoric smoke particles (MSPs) form through the vaporization of meteoroids and the subsequent re-condensation of metallic species in the mesosphere. Recently, iridium and platinum enrichments have been identified in Greenland ice layers and attributed to the fallout of MSPs supplying polar latitudes with cosmic matter during the Holocene. However, the MSP fallout to Antarctica during the Earth's climatic history remains essentially unknown. We have determined iridium and platinum in deep Antarctic ice from Dome C and Vostok dated back to 240 kyrs BP. We find high super-chondritic fluxes during warm periods and low meteoric accretion during glacial times, a pattern that is opposite to any known climatic variation in dust fallout to polar regions. The proposed explanation of this accretion regime is a weaker polar vortex during warm periods, allowing peripheral air masses enriched in volcanic iridium and platinum to penetrate inland to Antarctica. The MSP signal emerges only during cold phases and is four times lower than in the Greenland ice cap where more snow accumulates. This suggests that wet deposition is an important route of cosmic material to the Earth's surface. |
author2 |
Institute for the Dynamics of Environmental Processes-CNR University of Ca’ Foscari Venice, Italy Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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 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)-Centre National de la Recherche Scientifique (CNRS) School of Chemistry Leeds University of Leeds Unité de Formation et de Recherche de Physique Université Joseph Fourier - Grenoble 1 (UJF) 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) Korean Ocean Research and Development Institute (KORDI) Environmental Sciences Department Polytech' Grenoble Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Arctic and Antarctic Research Institute (AARI) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) European Project for Ice Coring in Antarctica (EPICA) |
format |
Article in Journal/Newspaper |
author |
Gabrielli, Paolo M.C. Plane, John F. Boutron, Claude Hong, Sungmin Cozzi, Giulio Cescon, Paolo Ferrari, Christophe, J. Crutzen, Paul Robert Petit, Jean Y. Lipenkov, Vladimir Barbante, Carlo |
author_facet |
Gabrielli, Paolo M.C. Plane, John F. Boutron, Claude Hong, Sungmin Cozzi, Giulio Cescon, Paolo Ferrari, Christophe, J. Crutzen, Paul Robert Petit, Jean Y. Lipenkov, Vladimir Barbante, Carlo |
author_sort |
Gabrielli, Paolo |
title |
A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap |
title_short |
A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap |
title_full |
A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap |
title_fullStr |
A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap |
title_full_unstemmed |
A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap |
title_sort |
climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the antarctic ice cap |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00375474 https://doi.org/10.1016/j.epsl.2006.08.015 |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica Greenland Ice cap |
genre_facet |
Antarc* Antarctic Antarctica Greenland Ice cap |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal-insu.archives-ouvertes.fr/insu-00375474 Earth and Planetary Science Letters, 2006, 250 (3-4), pp.459 à 469. ⟨10.1016/j.epsl.2006.08.015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2006.08.015 insu-00375474 https://hal-insu.archives-ouvertes.fr/insu-00375474 doi:10.1016/j.epsl.2006.08.015 |
op_doi |
https://doi.org/10.1016/j.epsl.2006.08.015 |
container_title |
Earth and Planetary Science Letters |
container_volume |
250 |
container_issue |
3-4 |
container_start_page |
459 |
op_container_end_page |
469 |
_version_ |
1766237879850237952 |
spelling |
ftunivnantes:oai:HAL:insu-00375474v1 2023-05-15T13:46:09+02:00 A climatic control on the accretion of meteoric and super-chondritic iridium–platinum to the Antarctic ice cap Gabrielli, Paolo M.C. Plane, John F. Boutron, Claude Hong, Sungmin Cozzi, Giulio Cescon, Paolo Ferrari, Christophe, J. Crutzen, Paul Robert Petit, Jean Y. Lipenkov, Vladimir Barbante, Carlo Institute for the Dynamics of Environmental Processes-CNR University of Ca’ Foscari Venice, Italy Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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 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)-Centre National de la Recherche Scientifique (CNRS) School of Chemistry Leeds University of Leeds Unité de Formation et de Recherche de Physique Université Joseph Fourier - Grenoble 1 (UJF) 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) Korean Ocean Research and Development Institute (KORDI) Environmental Sciences Department Polytech' Grenoble Max Planck Institute for Chemistry (MPIC) Max-Planck-Gesellschaft Arctic and Antarctic Research Institute (AARI) Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet) European Project for Ice Coring in Antarctica (EPICA) 2006 https://hal-insu.archives-ouvertes.fr/insu-00375474 https://doi.org/10.1016/j.epsl.2006.08.015 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2006.08.015 insu-00375474 https://hal-insu.archives-ouvertes.fr/insu-00375474 doi:10.1016/j.epsl.2006.08.015 ISSN: 0012-821X Earth and Planetary Science Letters https://hal-insu.archives-ouvertes.fr/insu-00375474 Earth and Planetary Science Letters, 2006, 250 (3-4), pp.459 à 469. ⟨10.1016/j.epsl.2006.08.015⟩ iridium platinum meteoric smoke ice Antarctica climate [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2006 ftunivnantes https://doi.org/10.1016/j.epsl.2006.08.015 2023-02-08T02:32:40Z International audience Meteoric smoke particles (MSPs) form through the vaporization of meteoroids and the subsequent re-condensation of metallic species in the mesosphere. Recently, iridium and platinum enrichments have been identified in Greenland ice layers and attributed to the fallout of MSPs supplying polar latitudes with cosmic matter during the Holocene. However, the MSP fallout to Antarctica during the Earth's climatic history remains essentially unknown. We have determined iridium and platinum in deep Antarctic ice from Dome C and Vostok dated back to 240 kyrs BP. We find high super-chondritic fluxes during warm periods and low meteoric accretion during glacial times, a pattern that is opposite to any known climatic variation in dust fallout to polar regions. The proposed explanation of this accretion regime is a weaker polar vortex during warm periods, allowing peripheral air masses enriched in volcanic iridium and platinum to penetrate inland to Antarctica. The MSP signal emerges only during cold phases and is four times lower than in the Greenland ice cap where more snow accumulates. This suggests that wet deposition is an important route of cosmic material to the Earth's surface. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Ice cap Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic Greenland Earth and Planetary Science Letters 250 3-4 459 469 |