Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows
Water mass transformation in the Nordic Seas and the associated overflow of dense waters across the Greenland-Scotland Ridge (GSR) acts to maintain the lower limb of the Atlantic meridional overturning circulation. Here, we use ocean and atmospheric reanalysis to assess the temporal variability in t...
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Online Access: | https://hdl.handle.net/11250/3100846 https://doi.org/10.1029/2023GL104158 |
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ftunivbergen:oai:bora.uib.no:11250/3100846 2023-12-03T10:23:23+01:00 Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows Årthun, Marius 2023 application/pdf https://hdl.handle.net/11250/3100846 https://doi.org/10.1029/2023GL104158 eng eng AGU urn:issn:0094-8276 https://hdl.handle.net/11250/3100846 https://doi.org/10.1029/2023GL104158 cristin:2182194 Geophysical Research Letters. 2023, 50 (15), e2023GL104158. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2023 The Author(s) e2023GL104158 Geophysical Research Letters 50 15 Journal article Peer reviewed 2023 ftunivbergen https://doi.org/10.1029/2023GL104158 2023-11-09T00:08:36Z Water mass transformation in the Nordic Seas and the associated overflow of dense waters across the Greenland-Scotland Ridge (GSR) acts to maintain the lower limb of the Atlantic meridional overturning circulation. Here, we use ocean and atmospheric reanalysis to assess the temporal variability in the Nordic Seas overturning circulation between 1950 and 2020 and its relation to surface buoyancy forcing. We find that variable surface-forced transformation of Atlantic waters in the eastern Nordic Seas can explain variations in overflow transport across the GSR. The production of dense water masses in the Greenland and Iceland Seas is of minor importance to overflow variability. The Nordic Seas overturning circulation shows pronounced multidecadal variability that is in phase with the Atlantic Multidecadal Variability (AMV) index, but no long-term trend. As the AMV is currently transitioning into its negative phase, the next decades could see a decreased overflow from the Nordic Seas. publishedVersion Article in Journal/Newspaper Greenland Greenland-Scotland Ridge Iceland Nordic Seas University of Bergen: Bergen Open Research Archive (BORA-UiB) Greenland Geophysical Research Letters 50 15 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
Water mass transformation in the Nordic Seas and the associated overflow of dense waters across the Greenland-Scotland Ridge (GSR) acts to maintain the lower limb of the Atlantic meridional overturning circulation. Here, we use ocean and atmospheric reanalysis to assess the temporal variability in the Nordic Seas overturning circulation between 1950 and 2020 and its relation to surface buoyancy forcing. We find that variable surface-forced transformation of Atlantic waters in the eastern Nordic Seas can explain variations in overflow transport across the GSR. The production of dense water masses in the Greenland and Iceland Seas is of minor importance to overflow variability. The Nordic Seas overturning circulation shows pronounced multidecadal variability that is in phase with the Atlantic Multidecadal Variability (AMV) index, but no long-term trend. As the AMV is currently transitioning into its negative phase, the next decades could see a decreased overflow from the Nordic Seas. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Årthun, Marius |
spellingShingle |
Årthun, Marius Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows |
author_facet |
Årthun, Marius |
author_sort |
Årthun, Marius |
title |
Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows |
title_short |
Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows |
title_full |
Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows |
title_fullStr |
Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows |
title_full_unstemmed |
Surface-Forced Variability in the Nordic Seas Overturning Circulation and Overflows |
title_sort |
surface-forced variability in the nordic seas overturning circulation and overflows |
publisher |
AGU |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3100846 https://doi.org/10.1029/2023GL104158 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland-Scotland Ridge Iceland Nordic Seas |
genre_facet |
Greenland Greenland-Scotland Ridge Iceland Nordic Seas |
op_source |
e2023GL104158 Geophysical Research Letters 50 15 |
op_relation |
urn:issn:0094-8276 https://hdl.handle.net/11250/3100846 https://doi.org/10.1029/2023GL104158 cristin:2182194 Geophysical Research Letters. 2023, 50 (15), e2023GL104158. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2023 The Author(s) |
op_doi |
https://doi.org/10.1029/2023GL104158 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
15 |
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1784271512087298048 |