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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American Association for the Advancement of Science (AAAS)
2015
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Online Access: | https://oceanrep.geomar.de/id/eprint/29506/ https://oceanrep.geomar.de/id/eprint/29506/1/Science-2015-Thornalley-706-10.pdf https://oceanrep.geomar.de/id/eprint/29506/7/aaa9554-Thornalley-SM.pdf https://doi.org/10.1126/science.aaa9554 |
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ftoceanrep:oai:oceanrep.geomar.de:29506 2023-05-15T14:27:16+02:00 A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period Thornalley, D. J. R. Bauch, H. A. Gebbie, G. Guo, W. Ziegler, M. Bernasconi, S. M. Barker, S. Skinner, L. C. Yu, J. 2015-08-14 text https://oceanrep.geomar.de/id/eprint/29506/ https://oceanrep.geomar.de/id/eprint/29506/1/Science-2015-Thornalley-706-10.pdf https://oceanrep.geomar.de/id/eprint/29506/7/aaa9554-Thornalley-SM.pdf https://doi.org/10.1126/science.aaa9554 en eng American Association for the Advancement of Science (AAAS) https://oceanrep.geomar.de/id/eprint/29506/1/Science-2015-Thornalley-706-10.pdf https://oceanrep.geomar.de/id/eprint/29506/7/aaa9554-Thornalley-SM.pdf Thornalley, D. J. R., Bauch, H. A. , Gebbie, G., Guo, W., Ziegler, M., Bernasconi, S. M., Barker, S., Skinner, L. C. and Yu, J. (2015) A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period. Science, 349 (6249). pp. 706-710. DOI 10.1126/science.aaa9554 <https://doi.org/10.1126/science.aaa9554>. doi:10.1126/science.aaa9554 info:eu-repo/semantics/restrictedAccess Article PeerReviewed info:eu-repo/semantics/article 2015 ftoceanrep https://doi.org/10.1126/science.aaa9554 2023-04-07T15:20:25Z 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 Arctic Ocean Ice Sheet Iceberg* Nordic Seas North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Science 349 6249 706 710 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
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, D. J. R. Bauch, H. A. Gebbie, G. Guo, W. Ziegler, M. Bernasconi, S. M. Barker, S. Skinner, L. C. Yu, J. |
spellingShingle |
Thornalley, D. J. R. Bauch, H. A. Gebbie, G. Guo, W. Ziegler, M. Bernasconi, S. M. Barker, S. Skinner, L. C. Yu, J. A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period |
author_facet |
Thornalley, D. J. R. Bauch, H. A. Gebbie, G. Guo, W. Ziegler, M. Bernasconi, S. M. Barker, S. Skinner, L. C. Yu, J. |
author_sort |
Thornalley, D. 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 (AAAS) |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/29506/ https://oceanrep.geomar.de/id/eprint/29506/1/Science-2015-Thornalley-706-10.pdf https://oceanrep.geomar.de/id/eprint/29506/7/aaa9554-Thornalley-SM.pdf https://doi.org/10.1126/science.aaa9554 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Ice Sheet Iceberg* Nordic Seas North Atlantic Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Ice Sheet Iceberg* Nordic Seas North Atlantic Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/29506/1/Science-2015-Thornalley-706-10.pdf https://oceanrep.geomar.de/id/eprint/29506/7/aaa9554-Thornalley-SM.pdf Thornalley, D. J. R., Bauch, H. A. , Gebbie, G., Guo, W., Ziegler, M., Bernasconi, S. M., Barker, S., Skinner, L. C. and Yu, J. (2015) A warm and poorly ventilated deep Arctic Mediterranean during the last glacial period. Science, 349 (6249). pp. 706-710. DOI 10.1126/science.aaa9554 <https://doi.org/10.1126/science.aaa9554>. doi:10.1126/science.aaa9554 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
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_ |
1766300911371550720 |