Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes
International audience Millennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO 2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean-atmosphere CO 2 exchange has been emphas...
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Online Access: | https://hal.science/hal-02916846 https://hal.science/hal-02916846/document https://hal.science/hal-02916846/file/ncomms11539.pdf https://doi.org/10.1038/ncomms11539 |
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ftinsu:oai:HAL:hal-02916846v1 2024-04-28T08:02:38+00:00 Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes Gottschalk, Julia Skinner, Luke C. Lippold, Jörg Vogel, Hendrik Frank, Norbert Jaccard, Samuel L. Waelbroeck, Claire University of Cambridge UK (CAM) Oeschger Centre for Climate Change Research (OCCR) Universität Bern / University of Bern (UNIBE) Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ) Universität Heidelberg Heidelberg = Heidelberg University Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2016-09 https://hal.science/hal-02916846 https://hal.science/hal-02916846/document https://hal.science/hal-02916846/file/ncomms11539.pdf https://doi.org/10.1038/ncomms11539 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms11539 hal-02916846 https://hal.science/hal-02916846 https://hal.science/hal-02916846/document https://hal.science/hal-02916846/file/ncomms11539.pdf doi:10.1038/ncomms11539 WOS: 000375937600001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.science/hal-02916846 Nature Communications, 2016, 7 (1), ⟨10.1038/ncomms11539⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1038/ncomms11539 2024-04-05T00:40:57Z International audience Millennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO 2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean-atmosphere CO 2 exchange has been emphasized, the exact nature of this role, in particular the relative contributions of physical (for example, ocean dynamics and air-sea gas exchange) versus biological processes (for example, export productivity), remains poorly constrained. Here we combine reconstructions of bottom-water [O 2 ], export production and 14 C ventilation ages in the sub-Antarctic Atlantic, and show that atmospheric CO 2 pulses during the last glacial-and deglacial periods were consistently accompanied by decreases in the biological export of carbon and increases in deep-ocean ventilation via southern-sourced water masses. These findings demonstrate how the Southern Ocean's 'organic carbon pump' has exerted a tight control on atmospheric CO 2 , and thus global climate, specifically via a synergy of both physical and biological processes . Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Nature Communications 7 1 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Gottschalk, Julia Skinner, Luke C. Lippold, Jörg Vogel, Hendrik Frank, Norbert Jaccard, Samuel L. Waelbroeck, Claire Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Millennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO 2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean-atmosphere CO 2 exchange has been emphasized, the exact nature of this role, in particular the relative contributions of physical (for example, ocean dynamics and air-sea gas exchange) versus biological processes (for example, export productivity), remains poorly constrained. Here we combine reconstructions of bottom-water [O 2 ], export production and 14 C ventilation ages in the sub-Antarctic Atlantic, and show that atmospheric CO 2 pulses during the last glacial-and deglacial periods were consistently accompanied by decreases in the biological export of carbon and increases in deep-ocean ventilation via southern-sourced water masses. These findings demonstrate how the Southern Ocean's 'organic carbon pump' has exerted a tight control on atmospheric CO 2 , and thus global climate, specifically via a synergy of both physical and biological processes . |
author2 |
University of Cambridge UK (CAM) Oeschger Centre for Climate Change Research (OCCR) Universität Bern / University of Bern (UNIBE) Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ) Universität Heidelberg Heidelberg = Heidelberg University Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Gottschalk, Julia Skinner, Luke C. Lippold, Jörg Vogel, Hendrik Frank, Norbert Jaccard, Samuel L. Waelbroeck, Claire |
author_facet |
Gottschalk, Julia Skinner, Luke C. Lippold, Jörg Vogel, Hendrik Frank, Norbert Jaccard, Samuel L. Waelbroeck, Claire |
author_sort |
Gottschalk, Julia |
title |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes |
title_short |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes |
title_full |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes |
title_fullStr |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes |
title_full_unstemmed |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO 2 changes |
title_sort |
biological and physical controls in the southern ocean on past millennial-scale atmospheric co 2 changes |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02916846 https://hal.science/hal-02916846/document https://hal.science/hal-02916846/file/ncomms11539.pdf https://doi.org/10.1038/ncomms11539 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.science/hal-02916846 Nature Communications, 2016, 7 (1), ⟨10.1038/ncomms11539⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/ncomms11539 hal-02916846 https://hal.science/hal-02916846 https://hal.science/hal-02916846/document https://hal.science/hal-02916846/file/ncomms11539.pdf doi:10.1038/ncomms11539 WOS: 000375937600001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/ncomms11539 |
container_title |
Nature Communications |
container_volume |
7 |
container_issue |
1 |
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1797573930261676032 |