Irminger Sea is the center of action for subpolar AMOC variability
Significant societally important climate impacts can be caused by changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) at higher latitudes. Focusing on variability and long-term change of the subpolar North Atlantic (SPNA)—a key AMOC action center—and using eastern OSNAP...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/533165/ https://nora.nerc.ac.uk/id/eprint/533165/1/Geophysical%20Research%20Letters%20-%202022%20-%20Chafik%20-%20Irminger%20Sea%20Is%20the%20Center%20of%20Action%20for%20Subpolar%20AMOC%20Variability.pdf https://doi.org/10.1029/2022GL099133 |
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ftnerc:oai:nora.nerc.ac.uk:533165 2023-05-15T17:06:08+02:00 Irminger Sea is the center of action for subpolar AMOC variability Chafik, L. Holliday, N. P. Bacon, S. Rossby, T. 2022-09-07 text http://nora.nerc.ac.uk/id/eprint/533165/ https://nora.nerc.ac.uk/id/eprint/533165/1/Geophysical%20Research%20Letters%20-%202022%20-%20Chafik%20-%20Irminger%20Sea%20Is%20the%20Center%20of%20Action%20for%20Subpolar%20AMOC%20Variability.pdf https://doi.org/10.1029/2022GL099133 en eng https://nora.nerc.ac.uk/id/eprint/533165/1/Geophysical%20Research%20Letters%20-%202022%20-%20Chafik%20-%20Irminger%20Sea%20Is%20the%20Center%20of%20Action%20for%20Subpolar%20AMOC%20Variability.pdf Chafik, L.; Holliday, N. P. orcid:0000-0002-9733-8002 Bacon, S. orcid:0000-0002-2471-9373 Rossby, T. 2022 Irminger Sea is the center of action for subpolar AMOC variability. Geophysical Research Letters, 49 (17). https://doi.org/10.1029/2022GL099133 <https://doi.org/10.1029/2022GL099133> cc_by_4 CC-BY Publication - Article PeerReviewed 2022 ftnerc https://doi.org/10.1029/2022GL099133 2023-02-04T19:53:33Z Significant societally important climate impacts can be caused by changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) at higher latitudes. Focusing on variability and long-term change of the subpolar North Atlantic (SPNA)—a key AMOC action center—and using eastern OSNAP array observations, we identify a distinct density and sea-surface height signature of the AMOC strength in the Irminger Sea (2014–2018), reinforced and extended with an ocean reanalysis (1993–2018). Reconstruction of AMOC variability using Irminger Sea density shows strong control by the North Atlantic Oscillation on subpolar overturning on multiple timescales, achieved via the gyre circulation and waters from the Labrador Sea. Furthermore, the observed decrease of Irminger Sea density since the mid-twentieth century (1950–2019) is suggestive of a long-term AMOC weakening of 2.2 Sv or 13%, however, this trend remains statistically insignificant due to the large interannual and decadal variability of the SPNA. Article in Journal/Newspaper Labrador Sea North Atlantic North Atlantic oscillation Natural Environment Research Council: NERC Open Research Archive Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Geophysical Research Letters 49 17 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
Significant societally important climate impacts can be caused by changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) at higher latitudes. Focusing on variability and long-term change of the subpolar North Atlantic (SPNA)—a key AMOC action center—and using eastern OSNAP array observations, we identify a distinct density and sea-surface height signature of the AMOC strength in the Irminger Sea (2014–2018), reinforced and extended with an ocean reanalysis (1993–2018). Reconstruction of AMOC variability using Irminger Sea density shows strong control by the North Atlantic Oscillation on subpolar overturning on multiple timescales, achieved via the gyre circulation and waters from the Labrador Sea. Furthermore, the observed decrease of Irminger Sea density since the mid-twentieth century (1950–2019) is suggestive of a long-term AMOC weakening of 2.2 Sv or 13%, however, this trend remains statistically insignificant due to the large interannual and decadal variability of the SPNA. |
format |
Article in Journal/Newspaper |
author |
Chafik, L. Holliday, N. P. Bacon, S. Rossby, T. |
spellingShingle |
Chafik, L. Holliday, N. P. Bacon, S. Rossby, T. Irminger Sea is the center of action for subpolar AMOC variability |
author_facet |
Chafik, L. Holliday, N. P. Bacon, S. Rossby, T. |
author_sort |
Chafik, L. |
title |
Irminger Sea is the center of action for subpolar AMOC variability |
title_short |
Irminger Sea is the center of action for subpolar AMOC variability |
title_full |
Irminger Sea is the center of action for subpolar AMOC variability |
title_fullStr |
Irminger Sea is the center of action for subpolar AMOC variability |
title_full_unstemmed |
Irminger Sea is the center of action for subpolar AMOC variability |
title_sort |
irminger sea is the center of action for subpolar amoc variability |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/533165/ https://nora.nerc.ac.uk/id/eprint/533165/1/Geophysical%20Research%20Letters%20-%202022%20-%20Chafik%20-%20Irminger%20Sea%20Is%20the%20Center%20of%20Action%20for%20Subpolar%20AMOC%20Variability.pdf https://doi.org/10.1029/2022GL099133 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
Labrador Sea North Atlantic North Atlantic oscillation |
genre_facet |
Labrador Sea North Atlantic North Atlantic oscillation |
op_relation |
https://nora.nerc.ac.uk/id/eprint/533165/1/Geophysical%20Research%20Letters%20-%202022%20-%20Chafik%20-%20Irminger%20Sea%20Is%20the%20Center%20of%20Action%20for%20Subpolar%20AMOC%20Variability.pdf Chafik, L.; Holliday, N. P. orcid:0000-0002-9733-8002 Bacon, S. orcid:0000-0002-2471-9373 Rossby, T. 2022 Irminger Sea is the center of action for subpolar AMOC variability. Geophysical Research Letters, 49 (17). https://doi.org/10.1029/2022GL099133 <https://doi.org/10.1029/2022GL099133> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2022GL099133 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
17 |
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1766061141011726336 |