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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Online Access: | https://hdl.handle.net/10037/27802 https://doi.org/10.1038/s41561-022-01050-w |
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ftunivtroemsoe:oai:munin.uit.no:10037/27802 2023-05-15T14:57:46+02:00 Active Nordic Seas deep-water formation during the last glacial maximum Larkin, Christina S. Mohamed, Mohamed Mahmoud Ezat Ahmed Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine Lander Sarnthein, Michael Tipper, Edward T. Piotrowski, Alex M. 2022-10-24 https://hdl.handle.net/10037/27802 https://doi.org/10.1038/s41561-022-01050-w eng eng Springer Nature Nature Geoscience EC/FP7: 274429 Natural Environment Research Council: NE/L002507/1 Norges forskningsråd: 223259 Natural Environment Research Council: 2117.0418 Tromsø forskningsstiftelse: A31720 Larkin, Mohamed M, Roberts, Bauch HA, Spielhagen RF, Noormets R, Polyak L, Moreton SG, Rasmussen TLR, Sarnthein M, Tipper, Piotrowski. Active Nordic Seas deep-water formation during the last glacial maximum. Nature Geoscience. 2022 FRIDAID 2064807 doi:10.1038/s41561-022-01050-w 1752-0894 1752-0908 https://hdl.handle.net/10037/27802 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 CC-BY Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2022 ftunivtroemsoe https://doi.org/10.1038/s41561-022-01050-w 2022-12-15T00:02:36Z 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 Tromsø: Munin Open Research Archive Arctic Arctic Ocean Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Nature Geoscience 15 11 925 931 |
institution |
Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
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. Mohamed, Mohamed Mahmoud Ezat Ahmed Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine Lander Sarnthein, Michael Tipper, Edward T. Piotrowski, Alex M. |
spellingShingle |
Larkin, Christina S. Mohamed, Mohamed Mahmoud Ezat Ahmed Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine Lander Sarnthein, Michael Tipper, Edward T. Piotrowski, Alex M. Active Nordic Seas deep-water formation during the last glacial maximum |
author_facet |
Larkin, Christina S. Mohamed, Mohamed Mahmoud Ezat Ahmed Roberts, Natalie L. Bauch, Henning A. Spielhagen, Robert F. Noormets, Riko Polyak, Leonid Moreton, Steven G. Rasmussen, Tine Lander Sarnthein, Michael Tipper, Edward T. Piotrowski, Alex 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 |
publisher |
Springer Nature |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/27802 https://doi.org/10.1038/s41561-022-01050-w |
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 |
Nature Geoscience EC/FP7: 274429 Natural Environment Research Council: NE/L002507/1 Norges forskningsråd: 223259 Natural Environment Research Council: 2117.0418 Tromsø forskningsstiftelse: A31720 Larkin, Mohamed M, Roberts, Bauch HA, Spielhagen RF, Noormets R, Polyak L, Moreton SG, Rasmussen TLR, Sarnthein M, Tipper, Piotrowski. Active Nordic Seas deep-water formation during the last glacial maximum. Nature Geoscience. 2022 FRIDAID 2064807 doi:10.1038/s41561-022-01050-w 1752-0894 1752-0908 https://hdl.handle.net/10037/27802 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41561-022-01050-w |
container_title |
Nature Geoscience |
container_volume |
15 |
container_issue |
11 |
container_start_page |
925 |
op_container_end_page |
931 |
_version_ |
1766329895433011200 |