Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise
Past glacial-interglacial increases in the concentration of atmospheric carbon dioxide (CO2) are thought to arise from the rapid release of CO2 sequestered in the deep sea, primarily via the Southern Ocean. Here, we present radiocarbon evidence from the Atlantic sector of the Southern Ocean that str...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/52053 2024-01-14T09:59:41+01:00 Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise Skinner, L. C. Fallon, Stewart Waelbroeck, Claire Michel, E Barker, S http://hdl.handle.net/1885/52053 https://doi.org/10.1126/science.1183627 https://openresearch-repository.anu.edu.au/bitstream/1885/52053/5/ScienceVol328_1147.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52053/7/01_Skinner_Ventilation_of_the_Deep_2010.pdf.jpg unknown American Association for the Advancement of Science 0036-8075 http://hdl.handle.net/1885/52053 doi:10.1126/science.1183627 https://openresearch-repository.anu.edu.au/bitstream/1885/52053/5/ScienceVol328_1147.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52053/7/01_Skinner_Ventilation_of_the_Deep_2010.pdf.jpg Science Keywords: carbon dioxide water atmospheric chemistry carbon dioxide carbon sequestration concentration (composition) deep water deglaciation glacial-interglacial cycle Last Glacial overturn paleoatmosphere radiocarbon dating upwelling ventilation Ant Journal article ftanucanberra https://doi.org/10.1126/science.1183627 2023-12-15T09:37:54Z Past glacial-interglacial increases in the concentration of atmospheric carbon dioxide (CO2) are thought to arise from the rapid release of CO2 sequestered in the deep sea, primarily via the Southern Ocean. Here, we present radiocarbon evidence from the Atlantic sector of the Southern Ocean that strongly supports this hypothesis. We show that during the last glacial period, deep water circulating around Antarctica was more than two times older than today relative to the atmosphere. During deglaciation, the dissipation of this old and presumably CO2-enriched deep water played an important role in the pulsed rise of atmospheric CO2 through its variable influence on the upwelling branch of the Antarctic overturning circulation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Australian National University: ANU Digital Collections Antarctic Southern Ocean The Antarctic Science 328 5982 1147 1151 |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
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unknown |
topic |
Keywords: carbon dioxide water atmospheric chemistry carbon dioxide carbon sequestration concentration (composition) deep water deglaciation glacial-interglacial cycle Last Glacial overturn paleoatmosphere radiocarbon dating upwelling ventilation Ant |
spellingShingle |
Keywords: carbon dioxide water atmospheric chemistry carbon dioxide carbon sequestration concentration (composition) deep water deglaciation glacial-interglacial cycle Last Glacial overturn paleoatmosphere radiocarbon dating upwelling ventilation Ant Skinner, L. C. Fallon, Stewart Waelbroeck, Claire Michel, E Barker, S Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise |
topic_facet |
Keywords: carbon dioxide water atmospheric chemistry carbon dioxide carbon sequestration concentration (composition) deep water deglaciation glacial-interglacial cycle Last Glacial overturn paleoatmosphere radiocarbon dating upwelling ventilation Ant |
description |
Past glacial-interglacial increases in the concentration of atmospheric carbon dioxide (CO2) are thought to arise from the rapid release of CO2 sequestered in the deep sea, primarily via the Southern Ocean. Here, we present radiocarbon evidence from the Atlantic sector of the Southern Ocean that strongly supports this hypothesis. We show that during the last glacial period, deep water circulating around Antarctica was more than two times older than today relative to the atmosphere. During deglaciation, the dissipation of this old and presumably CO2-enriched deep water played an important role in the pulsed rise of atmospheric CO2 through its variable influence on the upwelling branch of the Antarctic overturning circulation. |
format |
Article in Journal/Newspaper |
author |
Skinner, L. C. Fallon, Stewart Waelbroeck, Claire Michel, E Barker, S |
author_facet |
Skinner, L. C. Fallon, Stewart Waelbroeck, Claire Michel, E Barker, S |
author_sort |
Skinner, L. C. |
title |
Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise |
title_short |
Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise |
title_full |
Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise |
title_fullStr |
Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise |
title_full_unstemmed |
Ventilation of the Deep Southern Ocean and Deglacial CO 2 rise |
title_sort |
ventilation of the deep southern ocean and deglacial co 2 rise |
publisher |
American Association for the Advancement of Science |
url |
http://hdl.handle.net/1885/52053 https://doi.org/10.1126/science.1183627 https://openresearch-repository.anu.edu.au/bitstream/1885/52053/5/ScienceVol328_1147.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52053/7/01_Skinner_Ventilation_of_the_Deep_2010.pdf.jpg |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
Science |
op_relation |
0036-8075 http://hdl.handle.net/1885/52053 doi:10.1126/science.1183627 https://openresearch-repository.anu.edu.au/bitstream/1885/52053/5/ScienceVol328_1147.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/52053/7/01_Skinner_Ventilation_of_the_Deep_2010.pdf.jpg |
op_doi |
https://doi.org/10.1126/science.1183627 |
container_title |
Science |
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328 |
container_issue |
5982 |
container_start_page |
1147 |
op_container_end_page |
1151 |
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1788060350447353856 |