A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies
International audience A semi-empirical model has been developed to reproduce glacial–interglacial changes of continental dust and marine sodium concentrations (factor of ∼50 and ∼5, respectively) observed in inland Antarctic ice cores. The model uses conceptual pathways of aerosols within the high...
Published in: | Tellus B: Chemical and Physical Meteorology |
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Main Authors: | , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2009
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237/document https://hal-insu.archives-ouvertes.fr/insu-00421237/file/A%20model%20for%20large%20glacial%20interglacial%20climate%20induced%20changes%20in%20dust%20and%20sea%20salt%20concentrations%20in%20deep%20ice%20cores%20central%20Antarctica.pdf https://doi.org/10.1111/j.1600-0889.2009.00437.x |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Petit, Jean-Robert Delmonte, B. A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience A semi-empirical model has been developed to reproduce glacial–interglacial changes of continental dust and marine sodium concentrations (factor of ∼50 and ∼5, respectively) observed in inland Antarctic ice cores. The model uses conceptual pathways of aerosols within the high troposphere; assumes the dry deposition of impurities on the Antarctic surface; uses estimates of aerosol transit times taken independent of climate; assumes a temperature-dependent removal process during aerosol pathways from the mid-latitudes. The model is fitted to the data over the last four climate cycles from Vostok and EPICA Dome C Antarctic sites. As temperature is cooling, the aerosol response suggests different modes of climate couplings between latitudes, which can be continuous or below temperature thresholds for sodium and dust, respectively. The model estimates a southern South America dust source activity two to three times higher for glacial periods than for the Holocene and a glacial temperature over the Southern Ocean 3–5 °C cooler. Both estimates appear consistent with independent observations. After removal of temperature effects, dust and sodium residuals for both sites show orbital frequencies in opposite phase at the precession timescale. Such long-term insolation-related modulation of terrestrial and marine aerosol input, could provide a chemical pacemaker useful for refining ice core chronologies. |
author2 |
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) Department of Environmental Sciences Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) EPICA, a joint ESF (European Science Foundation)/EC scientific programme ANR-05-BLAN-0312,PICC(2005) |
format |
Article in Journal/Newspaper |
author |
Petit, Jean-Robert Delmonte, B. |
author_facet |
Petit, Jean-Robert Delmonte, B. |
author_sort |
Petit, Jean-Robert |
title |
A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
title_short |
A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
title_full |
A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
title_fullStr |
A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
title_full_unstemmed |
A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
title_sort |
model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central antarctica): palaeoclimatic implications and prospects for refining ice core chronologies |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237/document https://hal-insu.archives-ouvertes.fr/insu-00421237/file/A%20model%20for%20large%20glacial%20interglacial%20climate%20induced%20changes%20in%20dust%20and%20sea%20salt%20concentrations%20in%20deep%20ice%20cores%20central%20Antarctica.pdf https://doi.org/10.1111/j.1600-0889.2009.00437.x |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica EPICA ice core Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core Southern Ocean |
op_source |
ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://hal-insu.archives-ouvertes.fr/insu-00421237 Tellus B - Chemical and Physical Meteorology, 2009, 61 (5), pp.768-790. ⟨10.1111/j.1600-0889.2009.00437.x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2009.00437.x insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237/document https://hal-insu.archives-ouvertes.fr/insu-00421237/file/A%20model%20for%20large%20glacial%20interglacial%20climate%20induced%20changes%20in%20dust%20and%20sea%20salt%20concentrations%20in%20deep%20ice%20cores%20central%20Antarctica.pdf doi:10.1111/j.1600-0889.2009.00437.x |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1600-0889.2009.00437.x |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
61 |
container_issue |
5 |
container_start_page |
768 |
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spelling |
ftunivnantes:oai:HAL:insu-00421237v1 2023-05-15T13:37:14+02:00 A model for large glacial–interglacial climate-induced changes in dust and sea salt concentrations in deep ice cores (central Antarctica): palaeoclimatic implications and prospects for refining ice core chronologies Petit, Jean-Robert Delmonte, B. 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) Department of Environmental Sciences Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) EPICA, a joint ESF (European Science Foundation)/EC scientific programme ANR-05-BLAN-0312,PICC(2005) 2009-07-23 https://hal-insu.archives-ouvertes.fr/insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237/document https://hal-insu.archives-ouvertes.fr/insu-00421237/file/A%20model%20for%20large%20glacial%20interglacial%20climate%20induced%20changes%20in%20dust%20and%20sea%20salt%20concentrations%20in%20deep%20ice%20cores%20central%20Antarctica.pdf https://doi.org/10.1111/j.1600-0889.2009.00437.x en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2009.00437.x insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237 https://hal-insu.archives-ouvertes.fr/insu-00421237/document https://hal-insu.archives-ouvertes.fr/insu-00421237/file/A%20model%20for%20large%20glacial%20interglacial%20climate%20induced%20changes%20in%20dust%20and%20sea%20salt%20concentrations%20in%20deep%20ice%20cores%20central%20Antarctica.pdf doi:10.1111/j.1600-0889.2009.00437.x http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://hal-insu.archives-ouvertes.fr/insu-00421237 Tellus B - Chemical and Physical Meteorology, 2009, 61 (5), pp.768-790. ⟨10.1111/j.1600-0889.2009.00437.x⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2009 ftunivnantes https://doi.org/10.1111/j.1600-0889.2009.00437.x 2022-11-30T00:42:36Z International audience A semi-empirical model has been developed to reproduce glacial–interglacial changes of continental dust and marine sodium concentrations (factor of ∼50 and ∼5, respectively) observed in inland Antarctic ice cores. The model uses conceptual pathways of aerosols within the high troposphere; assumes the dry deposition of impurities on the Antarctic surface; uses estimates of aerosol transit times taken independent of climate; assumes a temperature-dependent removal process during aerosol pathways from the mid-latitudes. The model is fitted to the data over the last four climate cycles from Vostok and EPICA Dome C Antarctic sites. As temperature is cooling, the aerosol response suggests different modes of climate couplings between latitudes, which can be continuous or below temperature thresholds for sodium and dust, respectively. The model estimates a southern South America dust source activity two to three times higher for glacial periods than for the Holocene and a glacial temperature over the Southern Ocean 3–5 °C cooler. Both estimates appear consistent with independent observations. After removal of temperature effects, dust and sodium residuals for both sites show orbital frequencies in opposite phase at the precession timescale. Such long-term insolation-related modulation of terrestrial and marine aerosol input, could provide a chemical pacemaker useful for refining ice core chronologies. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA ice core Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean The Antarctic Tellus B: Chemical and Physical Meteorology 61 5 768 |