The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis
International audience Recent progress in the reconstruction of atmospheric CO2 records from Antarctic ice cores has allowed for the documentation of natural CO2 variations on orbital time scales over the last up to 800,000 years and for the resolution of millennial CO2 variations during the last gl...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2010
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Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00653239 https://doi.org/10.1016/j.quascirev.2009.06.007 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
spellingShingle |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Fischer, H. Schmitt, J. Lüthi, D. Stocker, T.F. Tschumi, T. Parekh, P. Joos, F. Köhler, P. Völker, C. Gersonde, R. Barbante, C. Le Floch, M. Raynaud, D. Wolff, E. The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis |
topic_facet |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
International audience Recent progress in the reconstruction of atmospheric CO2 records from Antarctic ice cores has allowed for the documentation of natural CO2 variations on orbital time scales over the last up to 800,000 years and for the resolution of millennial CO2 variations during the last glacial cycle in unprecedented detail. This has shown that atmospheric CO2 varied within natural bounds of approximately 170-300 ppmv but never reached recent CO2 concentrations caused by anthropogenic CO2 emissions. In addition, the natural atmospheric CO2 concentrations show an extraordinary correlation with Southern Ocean climate changes, pointing to a significant (direct or indirect) influence of climatic and environmental changes in the Southern Ocean region on atmospheric CO2 concentrations. Here, we compile recent ice core and marine sediment records of atmospheric CO2, temperature and environmental changes in the Southern Ocean region, as well as carbon cycle model experiments, in order to quantify the effect of potential Southern Ocean processes on atmospheric CO2 related to these orbital and millennial changes. This shows that physical and biological changes in the SO are able to explain substantial parts of the glacial/interglacial CO2 change, but that none of the single processes is able to explain this change by itself. In particular, changes in the Southern Ocean related to changes in the surface buoyancy flux, which in return is controlled by the waxing and waning of sea ice may favorably explain the high correlation of CO2 and Antarctic temperature on orbital and millennial time scales. In contrast, the changes of the position and strength of the westerly wind field were most likely too small to explain the observed changes in atmospheric CO2 or may even have increased atmospheric CO2 in the glacial. Also iron fertilization of the marine biota in the Southern Ocean contributes to a glacial drawdown of CO2 but turns out to be limited by other factors than the total dust input such as bioavailability of ... |
author2 |
Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern Bern -Universität Bern Bern Oeschger Centre for Climate Change Research (OCCR) University of Bern Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Institute for the Dynamics of Environmental Processes-CNR Department of Environmental Sciences Università degli Studi di Milano-Bicocca Milano (UNIMIB) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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) CLIPS 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)-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) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) European Project: 39423,FP6-SUSTDEV,EPICA-MIS |
format |
Article in Journal/Newspaper |
author |
Fischer, H. Schmitt, J. Lüthi, D. Stocker, T.F. Tschumi, T. Parekh, P. Joos, F. Köhler, P. Völker, C. Gersonde, R. Barbante, C. Le Floch, M. Raynaud, D. Wolff, E. |
author_facet |
Fischer, H. Schmitt, J. Lüthi, D. Stocker, T.F. Tschumi, T. Parekh, P. Joos, F. Köhler, P. Völker, C. Gersonde, R. Barbante, C. Le Floch, M. Raynaud, D. Wolff, E. |
author_sort |
Fischer, H. |
title |
The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis |
title_short |
The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis |
title_full |
The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis |
title_fullStr |
The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis |
title_full_unstemmed |
The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis |
title_sort |
role of southern ocean processes in orbital and millennial co2 variations - a synthesis |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00653239 https://doi.org/10.1016/j.quascirev.2009.06.007 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic ice core Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic ice core Sea ice Southern Ocean |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-00653239 Quaternary Science Reviews, Elsevier, 2010, 29 (1-2), pp.193-205. ⟨10.1016/j.quascirev.2009.06.007⟩ |
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op_doi |
https://doi.org/10.1016/j.quascirev.2009.06.007 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
1-2 |
container_start_page |
193 |
op_container_end_page |
205 |
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1766270121942188032 |
spelling |
ftccsdartic:oai:HAL:insu-00653239v1 2023-05-15T14:00:47+02:00 The role of Southern Ocean processes in orbital and millennial CO2 variations - A synthesis Fischer, H. Schmitt, J. Lüthi, D. Stocker, T.F. Tschumi, T. Parekh, P. Joos, F. Köhler, P. Völker, C. Gersonde, R. Barbante, C. Le Floch, M. Raynaud, D. Wolff, E. Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern Bern -Universität Bern Bern Oeschger Centre for Climate Change Research (OCCR) University of Bern Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Institute for the Dynamics of Environmental Processes-CNR Department of Environmental Sciences Università degli Studi di Milano-Bicocca Milano (UNIMIB) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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) CLIPS 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)-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) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) European Project: 39423,FP6-SUSTDEV,EPICA-MIS 2010-01 https://hal-insu.archives-ouvertes.fr/insu-00653239 https://doi.org/10.1016/j.quascirev.2009.06.007 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2009.06.007 info:eu-repo/grantAgreement//39423/EU/New Paleoreconstructions from Antarctic Ice and Marine Records/EPICA-MIS insu-00653239 https://hal-insu.archives-ouvertes.fr/insu-00653239 doi:10.1016/j.quascirev.2009.06.007 ISSN: 0277-3791 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-00653239 Quaternary Science Reviews, Elsevier, 2010, 29 (1-2), pp.193-205. ⟨10.1016/j.quascirev.2009.06.007⟩ [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1016/j.quascirev.2009.06.007 2021-10-24T17:02:35Z International audience Recent progress in the reconstruction of atmospheric CO2 records from Antarctic ice cores has allowed for the documentation of natural CO2 variations on orbital time scales over the last up to 800,000 years and for the resolution of millennial CO2 variations during the last glacial cycle in unprecedented detail. This has shown that atmospheric CO2 varied within natural bounds of approximately 170-300 ppmv but never reached recent CO2 concentrations caused by anthropogenic CO2 emissions. In addition, the natural atmospheric CO2 concentrations show an extraordinary correlation with Southern Ocean climate changes, pointing to a significant (direct or indirect) influence of climatic and environmental changes in the Southern Ocean region on atmospheric CO2 concentrations. Here, we compile recent ice core and marine sediment records of atmospheric CO2, temperature and environmental changes in the Southern Ocean region, as well as carbon cycle model experiments, in order to quantify the effect of potential Southern Ocean processes on atmospheric CO2 related to these orbital and millennial changes. This shows that physical and biological changes in the SO are able to explain substantial parts of the glacial/interglacial CO2 change, but that none of the single processes is able to explain this change by itself. In particular, changes in the Southern Ocean related to changes in the surface buoyancy flux, which in return is controlled by the waxing and waning of sea ice may favorably explain the high correlation of CO2 and Antarctic temperature on orbital and millennial time scales. In contrast, the changes of the position and strength of the westerly wind field were most likely too small to explain the observed changes in atmospheric CO2 or may even have increased atmospheric CO2 in the glacial. Also iron fertilization of the marine biota in the Southern Ocean contributes to a glacial drawdown of CO2 but turns out to be limited by other factors than the total dust input such as bioavailability of ... Article in Journal/Newspaper Antarc* Antarctic ice core Sea ice Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Southern Ocean Quaternary Science Reviews 29 1-2 193 205 |