Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel
The dense overflow waters of the Nordic Seas are an integral link and important diagnostic for the stability of the Atlantic Meridional Overturning Circulation (AMOC). The pathways feeding the overflow remain, however, poorly resolved. Here we use multiple observational platforms and an eddy-resolvi...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1689 2024-09-15T18:20:29+00:00 Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel Chafik, Léon HátÚn, Hjálmar Kjellsson, Joakim Larsen, Karin Margretha H. Rossby, Thomas Berx, Barbara 2020-01-01T08:00:00Z application/pdf https://digitalcommons.uri.edu/gsofacpubs/720 https://doi.org/10.1038/s41467-020-17426-8 https://digitalcommons.uri.edu/context/gsofacpubs/article/1689/viewcontent/Rossby_DiscoveryUnrecognized_2020.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/720 doi:10.1038/s41467-020-17426-8 https://digitalcommons.uri.edu/context/gsofacpubs/article/1689/viewcontent/Rossby_DiscoveryUnrecognized_2020.pdf http://creativecommons.org/licenses/by/4.0/ Graduate School of Oceanography Faculty Publications text 2020 ftunivrhodeislan https://doi.org/10.1038/s41467-020-17426-8 2024-08-21T00:09:33Z The dense overflow waters of the Nordic Seas are an integral link and important diagnostic for the stability of the Atlantic Meridional Overturning Circulation (AMOC). The pathways feeding the overflow remain, however, poorly resolved. Here we use multiple observational platforms and an eddy-resolving ocean model to identify an unrecognized deep flow toward the Faroe Bank Channel. We demonstrate that anticyclonic wind forcing in the Nordic Seas via its regulation of the basin circulation plays a key role in activating an unrecognized overflow path from the Norwegian slope – at which times the overflow is anomalously strong. We further establish that, regardless of upstream pathways, the overflows are mostly carried by a deep jet banked against the eastern slope of the Faroe-Shetland Channel, contrary to previous thinking. This deep flow is thus the primary conduit of overflow water feeding the lower branch of the AMOC via the Faroe Bank Channel. Text Nordic Seas University of Rhode Island: DigitalCommons@URI Nature Communications 11 1 |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
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unknown |
description |
The dense overflow waters of the Nordic Seas are an integral link and important diagnostic for the stability of the Atlantic Meridional Overturning Circulation (AMOC). The pathways feeding the overflow remain, however, poorly resolved. Here we use multiple observational platforms and an eddy-resolving ocean model to identify an unrecognized deep flow toward the Faroe Bank Channel. We demonstrate that anticyclonic wind forcing in the Nordic Seas via its regulation of the basin circulation plays a key role in activating an unrecognized overflow path from the Norwegian slope – at which times the overflow is anomalously strong. We further establish that, regardless of upstream pathways, the overflows are mostly carried by a deep jet banked against the eastern slope of the Faroe-Shetland Channel, contrary to previous thinking. This deep flow is thus the primary conduit of overflow water feeding the lower branch of the AMOC via the Faroe Bank Channel. |
format |
Text |
author |
Chafik, Léon HátÚn, Hjálmar Kjellsson, Joakim Larsen, Karin Margretha H. Rossby, Thomas Berx, Barbara |
spellingShingle |
Chafik, Léon HátÚn, Hjálmar Kjellsson, Joakim Larsen, Karin Margretha H. Rossby, Thomas Berx, Barbara Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel |
author_facet |
Chafik, Léon HátÚn, Hjálmar Kjellsson, Joakim Larsen, Karin Margretha H. Rossby, Thomas Berx, Barbara |
author_sort |
Chafik, Léon |
title |
Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel |
title_short |
Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel |
title_full |
Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel |
title_fullStr |
Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel |
title_full_unstemmed |
Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel |
title_sort |
discovery of an unrecognized pathway carrying overflow waters toward the faroe bank channel |
publisher |
DigitalCommons@URI |
publishDate |
2020 |
url |
https://digitalcommons.uri.edu/gsofacpubs/720 https://doi.org/10.1038/s41467-020-17426-8 https://digitalcommons.uri.edu/context/gsofacpubs/article/1689/viewcontent/Rossby_DiscoveryUnrecognized_2020.pdf |
genre |
Nordic Seas |
genre_facet |
Nordic Seas |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/720 doi:10.1038/s41467-020-17426-8 https://digitalcommons.uri.edu/context/gsofacpubs/article/1689/viewcontent/Rossby_DiscoveryUnrecognized_2020.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/s41467-020-17426-8 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1810458862529019904 |