Atmospheric depletion of mercury over Antarctica during glacial periods
International audience Mercury is a globally dispersed toxic metal that affects even remote polar areas. During seasonal atmospheric mercury depletion events in polar areas, mercury is removed from the atmosphere1, 2 and subsequently deposited in the surface snows3. However, it is unknown whether th...
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ftunivsavoie:oai:HAL:insu-00420858v1 2024-09-15T17:43:38+00:00 Atmospheric depletion of mercury over Antarctica during glacial periods Jitaru, Petru Gabrielli, Paolo Marteel, Alexandrine Plane, John M. C. Planchon, Frédéric Gauchard, Pierre-Alexis Ferrari, Christophe P. Boutron, Claude F. C. Adams, Freddy Hong, Sungmin Cescon, Paolo Barbante, Carlo Institute for the Dynamics of Environmental Processes-CNR University of Ca’ Foscari Venice, Italy Department of Chemistry University of Antwerp (UA) Laboratoire commun de métrologie LNE-CNAM (LCM-CNAM) Laboratoire National de Métrologie et d'Essais Trappes (LNE )-Conservatoire National des Arts et Métiers CNAM (CNAM) 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 Earth Sciences and Byrd Polar Research Center Ohio State University Columbus (OSU) Department of Earth Sciences Siena Università degli Studi di Siena = University of Siena (UNISI) School of Chemistry Leeds University of Leeds Geology Department Leuvensesteenweg Royal Museum for Central Africa Tervuren (RMCA) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) Korea Polar Research Institute (KOPRI) Department of Environmental Sciences 2009-06-14 https://insu.hal.science/insu-00420858 https://doi.org/10.1038/ngeo549 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/ngeo549 insu-00420858 https://insu.hal.science/insu-00420858 doi:10.1038/ngeo549 ISSN: 1752-0894 Nature Geoscience https://insu.hal.science/insu-00420858 Nature Geoscience, 2009, 2, pp.505-508. ⟨10.1038/ngeo549⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2009 ftunivsavoie https://doi.org/10.1038/ngeo549 2024-08-12T23:40:01Z International audience Mercury is a globally dispersed toxic metal that affects even remote polar areas. During seasonal atmospheric mercury depletion events in polar areas, mercury is removed from the atmosphere1, 2 and subsequently deposited in the surface snows3. However, it is unknown whether these events, which have been documented for the past two decades, have occurred in the past. Here we show that over the past 670,000 years, atmospheric mercury deposition in surface snows was greater during the coldest climatic stages, coincident with the highest atmospheric dust loads. A probable explanation for this increased scavenging is that the oxidation of gaseous mercury by sea-salt-derived halogens occurred in the cold atmosphere. The oxidized mercury compounds were then transferred to the abundant mineral dust particles and deposited on the snowpack, leading to the depletion of gaseous mercury in the Antarctic atmosphere. We conclude that polar regions acted as a mercury sink during the coldest climatic stages, and that substantial polar deposition of atmospheric mercury is therefore not an exclusively recent phenomenon. Article in Journal/Newspaper Antarc* Antarctic Antarctica Université Savoie Mont Blanc: HAL Nature Geoscience 2 7 505 508 |
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Open Polar |
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Université Savoie Mont Blanc: HAL |
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ftunivsavoie |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Jitaru, Petru Gabrielli, Paolo Marteel, Alexandrine Plane, John M. C. Planchon, Frédéric Gauchard, Pierre-Alexis Ferrari, Christophe P. Boutron, Claude F. C. Adams, Freddy Hong, Sungmin Cescon, Paolo Barbante, Carlo Atmospheric depletion of mercury over Antarctica during glacial periods |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Mercury is a globally dispersed toxic metal that affects even remote polar areas. During seasonal atmospheric mercury depletion events in polar areas, mercury is removed from the atmosphere1, 2 and subsequently deposited in the surface snows3. However, it is unknown whether these events, which have been documented for the past two decades, have occurred in the past. Here we show that over the past 670,000 years, atmospheric mercury deposition in surface snows was greater during the coldest climatic stages, coincident with the highest atmospheric dust loads. A probable explanation for this increased scavenging is that the oxidation of gaseous mercury by sea-salt-derived halogens occurred in the cold atmosphere. The oxidized mercury compounds were then transferred to the abundant mineral dust particles and deposited on the snowpack, leading to the depletion of gaseous mercury in the Antarctic atmosphere. We conclude that polar regions acted as a mercury sink during the coldest climatic stages, and that substantial polar deposition of atmospheric mercury is therefore not an exclusively recent phenomenon. |
author2 |
Institute for the Dynamics of Environmental Processes-CNR University of Ca’ Foscari Venice, Italy Department of Chemistry University of Antwerp (UA) Laboratoire commun de métrologie LNE-CNAM (LCM-CNAM) Laboratoire National de Métrologie et d'Essais Trappes (LNE )-Conservatoire National des Arts et Métiers CNAM (CNAM) 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 Earth Sciences and Byrd Polar Research Center Ohio State University Columbus (OSU) Department of Earth Sciences Siena Università degli Studi di Siena = University of Siena (UNISI) School of Chemistry Leeds University of Leeds Geology Department Leuvensesteenweg Royal Museum for Central Africa Tervuren (RMCA) Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) Korea Polar Research Institute (KOPRI) Department of Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Jitaru, Petru Gabrielli, Paolo Marteel, Alexandrine Plane, John M. C. Planchon, Frédéric Gauchard, Pierre-Alexis Ferrari, Christophe P. Boutron, Claude F. C. Adams, Freddy Hong, Sungmin Cescon, Paolo Barbante, Carlo |
author_facet |
Jitaru, Petru Gabrielli, Paolo Marteel, Alexandrine Plane, John M. C. Planchon, Frédéric Gauchard, Pierre-Alexis Ferrari, Christophe P. Boutron, Claude F. C. Adams, Freddy Hong, Sungmin Cescon, Paolo Barbante, Carlo |
author_sort |
Jitaru, Petru |
title |
Atmospheric depletion of mercury over Antarctica during glacial periods |
title_short |
Atmospheric depletion of mercury over Antarctica during glacial periods |
title_full |
Atmospheric depletion of mercury over Antarctica during glacial periods |
title_fullStr |
Atmospheric depletion of mercury over Antarctica during glacial periods |
title_full_unstemmed |
Atmospheric depletion of mercury over Antarctica during glacial periods |
title_sort |
atmospheric depletion of mercury over antarctica during glacial periods |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://insu.hal.science/insu-00420858 https://doi.org/10.1038/ngeo549 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
ISSN: 1752-0894 Nature Geoscience https://insu.hal.science/insu-00420858 Nature Geoscience, 2009, 2, pp.505-508. ⟨10.1038/ngeo549⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/ngeo549 insu-00420858 https://insu.hal.science/insu-00420858 doi:10.1038/ngeo549 |
op_doi |
https://doi.org/10.1038/ngeo549 |
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Nature Geoscience |
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2 |
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7 |
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508 |
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1810490715757608960 |