Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes
Millennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean–atmosphere CO2 exchange has been emphasized, the exact nature of...
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ftpubmed:oai:pubmedcentral.nih.gov:4873644 2023-05-15T14:05:12+02:00 Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes Gottschalk, Julia Skinner, Luke C. Lippold, Jörg Vogel, Hendrik Frank, Norbert Jaccard, Samuel L. Waelbroeck, Claire 2016-05-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4873644/ http://www.ncbi.nlm.nih.gov/pubmed/27187527 https://doi.org/10.1038/ncomms11539 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4873644/ http://www.ncbi.nlm.nih.gov/pubmed/27187527 http://dx.doi.org/10.1038/ncomms11539 Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/ncomms11539 2016-06-05T00:31:29Z Millennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean–atmosphere CO2 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 [O2], export production and 14C ventilation ages in the sub-Antarctic Atlantic, and show that atmospheric CO2 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 CO2, and thus global climate, specifically via a synergy of both physical and biological processes. Text Antarc* Antarctic Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean Nature Communications 7 1 |
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Article 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 CO2 changes |
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Millennial-scale climate changes during the last glacial period and deglaciation were accompanied by rapid changes in atmospheric CO2 that remain unexplained. While the role of the Southern Ocean as a 'control valve' on ocean–atmosphere CO2 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 [O2], export production and 14C ventilation ages in the sub-Antarctic Atlantic, and show that atmospheric CO2 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 CO2, and thus global climate, specifically via a synergy of both physical and biological processes. |
format |
Text |
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 CO2 changes |
title_short |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes |
title_full |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes |
title_fullStr |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes |
title_full_unstemmed |
Biological and physical controls in the Southern Ocean on past millennial-scale atmospheric CO2 changes |
title_sort |
biological and physical controls in the southern ocean on past millennial-scale atmospheric co2 changes |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4873644/ http://www.ncbi.nlm.nih.gov/pubmed/27187527 https://doi.org/10.1038/ncomms11539 |
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Antarctic Southern Ocean |
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Antarctic Southern Ocean |
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Antarc* Antarctic Southern Ocean |
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Antarc* Antarctic Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4873644/ http://www.ncbi.nlm.nih.gov/pubmed/27187527 http://dx.doi.org/10.1038/ncomms11539 |
op_rights |
Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/ncomms11539 |
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Nature Communications |
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7 |
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1 |
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