Active nordic seas deep-water formation during the last glacial maximum
The Nordic Seas are the primary location where the warm waters of the North Atlantic Current densify to form North Atlantic Deep Water, which plays a key part in the modern Atlantic Meridional Overturning Circulation. The formation of dense water in the Nordic Seas and Arctic Ocean and resulting oce...
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2022
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Online Access: | https://eprints.soton.ac.uk/471742/ https://eprints.soton.ac.uk/471742/1/Larkin_Nordic_Seas_AcceptedManuscript.pdf https://eprints.soton.ac.uk/471742/2/s41561_022_01050_w.pdf https://eprints.soton.ac.uk/471742/3/Larkin_Nordic_Seas_AcceptedManuscript.pdf |
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ftsouthampton:oai:eprints.soton.ac.uk:471742 2023-12-03T10:17:17+01:00 Active nordic seas deep-water formation during the last glacial maximum Larkin, Christina S. Ezat, Mohamed M. Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine L. Sarnthein, Michael Tipper, Edward T. Piotrowski, Alexander M. 2022-10-24 text https://eprints.soton.ac.uk/471742/ https://eprints.soton.ac.uk/471742/1/Larkin_Nordic_Seas_AcceptedManuscript.pdf https://eprints.soton.ac.uk/471742/2/s41561_022_01050_w.pdf https://eprints.soton.ac.uk/471742/3/Larkin_Nordic_Seas_AcceptedManuscript.pdf en English eng https://eprints.soton.ac.uk/471742/1/Larkin_Nordic_Seas_AcceptedManuscript.pdf https://eprints.soton.ac.uk/471742/2/s41561_022_01050_w.pdf https://eprints.soton.ac.uk/471742/3/Larkin_Nordic_Seas_AcceptedManuscript.pdf Larkin, Christina S., Ezat, Mohamed M., Roberts, Natalie L., Bauch, Henning A., Spielhagen, Robert F., Noormets, Riko, Polyak, Leonid, Moreton, Steven G., Rasmussen, Tine L., Sarnthein, Michael, Tipper, Edward T. and Piotrowski, Alexander M. (2022) Active nordic seas deep-water formation during the last glacial maximum. Nature Geoscience, 15, 925 - 931. (doi:10.1038/s41561- 022-01050-w <http://dx.doi.org/10.1038/s41561- 022-01050-w>). accepted_manuscript cc_by_4 Article PeerReviewed 2022 ftsouthampton https://doi.org/10.1038/s41561 2023-11-03T00:06:24Z The Nordic Seas are the primary location where the warm waters of the North Atlantic Current densify to form North Atlantic Deep Water, which plays a key part in the modern Atlantic Meridional Overturning Circulation. The formation of dense water in the Nordic Seas and Arctic Ocean and resulting ocean circulation changes were probably driven by and contributed to the regional and global climate of the last glacial maximum (LGM). Here we map the source and degree of mixing of deep water in the Nordic Seas and through the Arctic Gateway (Yermak Plateau) over the past 35 thousand years using neodymium isotopes (εNd) measured on authigenic phases in deep-sea sediments with a high spatial and temporal resolution. We find that a large-scale reorganization of deep-water formation in the Nordic Seas took place between the LGM (23–18 thousand years ago) and the rapid climate shift that accompanied the subsequent deglaciation (18–10 thousand years ago). We show that homogeneous εNd signatures across a wide range of sites support LGM deep-water formation in the Nordic Seas. In contrast, during the deglaciation, disparate and spatially variable εNd values are observed leading to the conclusion that deep-water formation may have been reduced during this time. Article in Journal/Newspaper Arctic Arctic Ocean Nordic Seas north atlantic current North Atlantic Deep Water North Atlantic Yermak plateau University of Southampton: e-Prints Soton Arctic Arctic Ocean Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The Nordic Seas are the primary location where the warm waters of the North Atlantic Current densify to form North Atlantic Deep Water, which plays a key part in the modern Atlantic Meridional Overturning Circulation. The formation of dense water in the Nordic Seas and Arctic Ocean and resulting ocean circulation changes were probably driven by and contributed to the regional and global climate of the last glacial maximum (LGM). Here we map the source and degree of mixing of deep water in the Nordic Seas and through the Arctic Gateway (Yermak Plateau) over the past 35 thousand years using neodymium isotopes (εNd) measured on authigenic phases in deep-sea sediments with a high spatial and temporal resolution. We find that a large-scale reorganization of deep-water formation in the Nordic Seas took place between the LGM (23–18 thousand years ago) and the rapid climate shift that accompanied the subsequent deglaciation (18–10 thousand years ago). We show that homogeneous εNd signatures across a wide range of sites support LGM deep-water formation in the Nordic Seas. In contrast, during the deglaciation, disparate and spatially variable εNd values are observed leading to the conclusion that deep-water formation may have been reduced during this time. |
format |
Article in Journal/Newspaper |
author |
Larkin, Christina S. Ezat, Mohamed M. Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine L. Sarnthein, Michael Tipper, Edward T. Piotrowski, Alexander M. |
spellingShingle |
Larkin, Christina S. Ezat, Mohamed M. Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine L. Sarnthein, Michael Tipper, Edward T. Piotrowski, Alexander M. Active nordic seas deep-water formation during the last glacial maximum |
author_facet |
Larkin, Christina S. Ezat, Mohamed M. Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine L. Sarnthein, Michael Tipper, Edward T. Piotrowski, Alexander M. |
author_sort |
Larkin, Christina S. |
title |
Active nordic seas deep-water formation during the last glacial maximum |
title_short |
Active nordic seas deep-water formation during the last glacial maximum |
title_full |
Active nordic seas deep-water formation during the last glacial maximum |
title_fullStr |
Active nordic seas deep-water formation during the last glacial maximum |
title_full_unstemmed |
Active nordic seas deep-water formation during the last glacial maximum |
title_sort |
active nordic seas deep-water formation during the last glacial maximum |
publishDate |
2022 |
url |
https://eprints.soton.ac.uk/471742/ https://eprints.soton.ac.uk/471742/1/Larkin_Nordic_Seas_AcceptedManuscript.pdf https://eprints.soton.ac.uk/471742/2/s41561_022_01050_w.pdf https://eprints.soton.ac.uk/471742/3/Larkin_Nordic_Seas_AcceptedManuscript.pdf |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Yermak Plateau |
genre |
Arctic Arctic Ocean Nordic Seas north atlantic current North Atlantic Deep Water North Atlantic Yermak plateau |
genre_facet |
Arctic Arctic Ocean Nordic Seas north atlantic current North Atlantic Deep Water North Atlantic Yermak plateau |
op_relation |
https://eprints.soton.ac.uk/471742/1/Larkin_Nordic_Seas_AcceptedManuscript.pdf https://eprints.soton.ac.uk/471742/2/s41561_022_01050_w.pdf https://eprints.soton.ac.uk/471742/3/Larkin_Nordic_Seas_AcceptedManuscript.pdf Larkin, Christina S., Ezat, Mohamed M., Roberts, Natalie L., Bauch, Henning A., Spielhagen, Robert F., Noormets, Riko, Polyak, Leonid, Moreton, Steven G., Rasmussen, Tine L., Sarnthein, Michael, Tipper, Edward T. and Piotrowski, Alexander M. (2022) Active nordic seas deep-water formation during the last glacial maximum. Nature Geoscience, 15, 925 - 931. (doi:10.1038/s41561- 022-01050-w <http://dx.doi.org/10.1038/s41561- 022-01050-w>). |
op_rights |
accepted_manuscript cc_by_4 |
op_doi |
https://doi.org/10.1038/s41561 |
_version_ |
1784264233772384256 |