A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period
Changes in the formation of dense water in the Arctic Ocean and Nordic Seas [the “Arctic Mediterranean” (AM)] probably contributed to the altered climate of the last glacial period. We examined past changes in AM circulation by reconstructing radiocarbon ventilation ages of the deep Nordic Seas over...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/103431 2024-01-14T10:03:51+01:00 A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period Thornalley, David J. R. Bauch, H A Gebbie, G Guo, W Ziegler, Martin Bernasconi, Stefano M. Barker, S Skinner, L. C. Yu, Jimin http://hdl.handle.net/1885/103431 https://doi.org/10.1126/science.aaa9554 https://openresearch-repository.anu.edu.au/bitstream/1885/103431/7/01_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/103431/9/02_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg unknown American Association for the Advancement of Science 0036-8075 http://hdl.handle.net/1885/103431 doi:10.1126/science.aaa9554 https://openresearch-repository.anu.edu.au/bitstream/1885/103431/7/01_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/103431/9/02_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg Science Journal article ftanucanberra https://doi.org/10.1126/science.aaa9554 2023-12-15T09:39:15Z Changes in the formation of dense water in the Arctic Ocean and Nordic Seas [the “Arctic Mediterranean” (AM)] probably contributed to the altered climate of the last glacial period. We examined past changes in AM circulation by reconstructing radiocarbon ventilation ages of the deep Nordic Seas over the past 30,000 years. Our results show that the glacial deep AM was extremely poorly ventilated (ventilation ages of up to 10,000 years). Subsequent episodic overflow of aged water into the mid-depth North Atlantic occurred during deglaciation. Proxy data also suggest that the deep glacial AM was ~2° to 3°C warmer than modern temperatures; deglacial mixing of the deep AM with the upper ocean thus potentially contributed to the melting of sea ice, icebergs, and terminal ice-sheet margins Article in Journal/Newspaper Arctic Arctic Ocean Ice Sheet Iceberg* Nordic Seas North Atlantic Sea ice Australian National University: ANU Digital Collections Arctic Arctic Ocean Science 349 6249 706 710 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
Changes in the formation of dense water in the Arctic Ocean and Nordic Seas [the “Arctic Mediterranean” (AM)] probably contributed to the altered climate of the last glacial period. We examined past changes in AM circulation by reconstructing radiocarbon ventilation ages of the deep Nordic Seas over the past 30,000 years. Our results show that the glacial deep AM was extremely poorly ventilated (ventilation ages of up to 10,000 years). Subsequent episodic overflow of aged water into the mid-depth North Atlantic occurred during deglaciation. Proxy data also suggest that the deep glacial AM was ~2° to 3°C warmer than modern temperatures; deglacial mixing of the deep AM with the upper ocean thus potentially contributed to the melting of sea ice, icebergs, and terminal ice-sheet margins |
format |
Article in Journal/Newspaper |
author |
Thornalley, David J. R. Bauch, H A Gebbie, G Guo, W Ziegler, Martin Bernasconi, Stefano M. Barker, S Skinner, L. C. Yu, Jimin |
spellingShingle |
Thornalley, David J. R. Bauch, H A Gebbie, G Guo, W Ziegler, Martin Bernasconi, Stefano M. Barker, S Skinner, L. C. Yu, Jimin A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
author_facet |
Thornalley, David J. R. Bauch, H A Gebbie, G Guo, W Ziegler, Martin Bernasconi, Stefano M. Barker, S Skinner, L. C. Yu, Jimin |
author_sort |
Thornalley, David J. R. |
title |
A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
title_short |
A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
title_full |
A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
title_fullStr |
A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
title_full_unstemmed |
A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
title_sort |
warm and poorly ventilated deep arctic mediterranean during the last glacial period |
publisher |
American Association for the Advancement of Science |
url |
http://hdl.handle.net/1885/103431 https://doi.org/10.1126/science.aaa9554 https://openresearch-repository.anu.edu.au/bitstream/1885/103431/7/01_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/103431/9/02_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Ice Sheet Iceberg* Nordic Seas North Atlantic Sea ice |
genre_facet |
Arctic Arctic Ocean Ice Sheet Iceberg* Nordic Seas North Atlantic Sea ice |
op_source |
Science |
op_relation |
0036-8075 http://hdl.handle.net/1885/103431 doi:10.1126/science.aaa9554 https://openresearch-repository.anu.edu.au/bitstream/1885/103431/7/01_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/103431/9/02_Thornalley_A_warm_and_poorly_ventilated_2015.pdf.jpg |
op_doi |
https://doi.org/10.1126/science.aaa9554 |
container_title |
Science |
container_volume |
349 |
container_issue |
6249 |
container_start_page |
706 |
op_container_end_page |
710 |
_version_ |
1788058528169066496 |