Antarctic sea ice control on ocean circulation in present and glacial climates
In the modern climate, the ocean below 2 km is mainly filled by waters sinking into the abyss around Antarctica and in the North Atlantic. Paleoproxies indicate that waters of North Atlantic origin were instead absent below 2 km at the Last Glacial Maximum, resulting in an expansion of the volume oc...
Published in: | Proceedings of the National Academy of Sciences |
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2014
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/antarctic-sea-ice-control-on-ocean-circulation-in-present-and-glacial-climates(9646968a-b518-4045-830c-4a217135eff0).html https://doi.org/10.1073/pnas.1323922111 https://research-repository.st-andrews.ac.uk/bitstream/10023/5401/1/ferrari2014pnas8753.pdf |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/9646968a-b518-4045-830c-4a217135eff0 2024-06-23T07:47:35+00:00 Antarctic sea ice control on ocean circulation in present and glacial climates Ferrari, Raffaele Jansen, Malte F. Adkins, Jess F. Burke, Andrea Stewart, Andrew L. Thompson, Andrew F. 2014-06-17 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/antarctic-sea-ice-control-on-ocean-circulation-in-present-and-glacial-climates(9646968a-b518-4045-830c-4a217135eff0).html https://doi.org/10.1073/pnas.1323922111 https://research-repository.st-andrews.ac.uk/bitstream/10023/5401/1/ferrari2014pnas8753.pdf eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/antarctic-sea-ice-control-on-ocean-circulation-in-present-and-glacial-climates(9646968a-b518-4045-830c-4a217135eff0).html info:eu-repo/semantics/openAccess Ferrari , R , Jansen , M F , Adkins , J F , Burke , A , Stewart , A L & Thompson , A F 2014 , ' Antarctic sea ice control on ocean circulation in present and glacial climates ' , Proceedings of the National Academy of Sciences of the United States of America , vol. 111 , no. 24 , pp. 8753-8758 . https://doi.org/10.1073/pnas.1323922111 Carbon cycle Ice age Ocean circulation Paleoceanography Southern Ocean article 2014 ftunstandrewcris https://doi.org/10.1073/pnas.1323922111 2024-06-13T00:43:04Z In the modern climate, the ocean below 2 km is mainly filled by waters sinking into the abyss around Antarctica and in the North Atlantic. Paleoproxies indicate that waters of North Atlantic origin were instead absent below 2 km at the Last Glacial Maximum, resulting in an expansion of the volume occupied by Antarctic origin waters. In this study we show that this rearrangement of deep water masses is dynamically linked to the expansion of summer sea ice around Antarctica. A simple theory further suggests that these deep waters only came to the surface under sea ice, which insulated them from atmospheric forcing, and were weakly mixed with overlying waters, thus being able to store carbon for long times. This unappreciated link between the expansion of sea ice and the appearance of a voluminous and insulated water mass may help quantify the ocean's role in regulating atmospheric carbon dioxide on glacial-interglacial timescales. Previous studies pointed to many independent changes in ocean physics to account for the observed swings in atmospheric carbon dioxide. Here it is shown that many of these changes are dynamically linked and therefore must co-occur. Article in Journal/Newspaper Antarc* Antarctic Antarctica North Atlantic Sea ice Southern Ocean University of St Andrews: Research Portal Antarctic Southern Ocean Proceedings of the National Academy of Sciences 111 24 8753 8758 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Carbon cycle Ice age Ocean circulation Paleoceanography Southern Ocean |
spellingShingle |
Carbon cycle Ice age Ocean circulation Paleoceanography Southern Ocean Ferrari, Raffaele Jansen, Malte F. Adkins, Jess F. Burke, Andrea Stewart, Andrew L. Thompson, Andrew F. Antarctic sea ice control on ocean circulation in present and glacial climates |
topic_facet |
Carbon cycle Ice age Ocean circulation Paleoceanography Southern Ocean |
description |
In the modern climate, the ocean below 2 km is mainly filled by waters sinking into the abyss around Antarctica and in the North Atlantic. Paleoproxies indicate that waters of North Atlantic origin were instead absent below 2 km at the Last Glacial Maximum, resulting in an expansion of the volume occupied by Antarctic origin waters. In this study we show that this rearrangement of deep water masses is dynamically linked to the expansion of summer sea ice around Antarctica. A simple theory further suggests that these deep waters only came to the surface under sea ice, which insulated them from atmospheric forcing, and were weakly mixed with overlying waters, thus being able to store carbon for long times. This unappreciated link between the expansion of sea ice and the appearance of a voluminous and insulated water mass may help quantify the ocean's role in regulating atmospheric carbon dioxide on glacial-interglacial timescales. Previous studies pointed to many independent changes in ocean physics to account for the observed swings in atmospheric carbon dioxide. Here it is shown that many of these changes are dynamically linked and therefore must co-occur. |
format |
Article in Journal/Newspaper |
author |
Ferrari, Raffaele Jansen, Malte F. Adkins, Jess F. Burke, Andrea Stewart, Andrew L. Thompson, Andrew F. |
author_facet |
Ferrari, Raffaele Jansen, Malte F. Adkins, Jess F. Burke, Andrea Stewart, Andrew L. Thompson, Andrew F. |
author_sort |
Ferrari, Raffaele |
title |
Antarctic sea ice control on ocean circulation in present and glacial climates |
title_short |
Antarctic sea ice control on ocean circulation in present and glacial climates |
title_full |
Antarctic sea ice control on ocean circulation in present and glacial climates |
title_fullStr |
Antarctic sea ice control on ocean circulation in present and glacial climates |
title_full_unstemmed |
Antarctic sea ice control on ocean circulation in present and glacial climates |
title_sort |
antarctic sea ice control on ocean circulation in present and glacial climates |
publishDate |
2014 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/antarctic-sea-ice-control-on-ocean-circulation-in-present-and-glacial-climates(9646968a-b518-4045-830c-4a217135eff0).html https://doi.org/10.1073/pnas.1323922111 https://research-repository.st-andrews.ac.uk/bitstream/10023/5401/1/ferrari2014pnas8753.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica North Atlantic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica North Atlantic Sea ice Southern Ocean |
op_source |
Ferrari , R , Jansen , M F , Adkins , J F , Burke , A , Stewart , A L & Thompson , A F 2014 , ' Antarctic sea ice control on ocean circulation in present and glacial climates ' , Proceedings of the National Academy of Sciences of the United States of America , vol. 111 , no. 24 , pp. 8753-8758 . https://doi.org/10.1073/pnas.1323922111 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/antarctic-sea-ice-control-on-ocean-circulation-in-present-and-glacial-climates(9646968a-b518-4045-830c-4a217135eff0).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1073/pnas.1323922111 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
111 |
container_issue |
24 |
container_start_page |
8753 |
op_container_end_page |
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