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...
Published in: | Nature Communications |
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2020
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Online Access: | https://oceanrep.geomar.de/id/eprint/50245/ https://oceanrep.geomar.de/id/eprint/50245/1/s41467-020-17426-8.pdf https://oceanrep.geomar.de/id/eprint/50245/2/41467_2020_17426_MOESM1_ESM.pdf https://doi.org/10.1038/s41467-020-17426-8 |
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ftoceanrep:oai:oceanrep.geomar.de:50245 2023-05-15T17:24:19+02:00 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 2020-07-24 text https://oceanrep.geomar.de/id/eprint/50245/ https://oceanrep.geomar.de/id/eprint/50245/1/s41467-020-17426-8.pdf https://oceanrep.geomar.de/id/eprint/50245/2/41467_2020_17426_MOESM1_ESM.pdf https://doi.org/10.1038/s41467-020-17426-8 en eng Nature Research https://oceanrep.geomar.de/id/eprint/50245/1/s41467-020-17426-8.pdf https://oceanrep.geomar.de/id/eprint/50245/2/41467_2020_17426_MOESM1_ESM.pdf Chafik, L. , Hátún, H., Kjellsson, J. , Larsen, K. M. H. , Rossby, T. and Berx, B. (2020) Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel. Open Access Nature Communications, 11 (1). Art.Nr. 3721. DOI 10.1038/s41467-020-17426-8 <https://doi.org/10.1038/s41467-020-17426-8>. doi:10.1038/s41467-020-17426-8 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2020 ftoceanrep https://doi.org/10.1038/s41467-020-17426-8 2023-04-07T15:51:17Z 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. Article in Journal/Newspaper Nordic Seas OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Faroe Bank ENVELOPE(-8.667,-8.667,60.917,60.917) Nature Communications 11 1 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
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 |
Article in Journal/Newspaper |
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 |
Nature Research |
publishDate |
2020 |
url |
https://oceanrep.geomar.de/id/eprint/50245/ https://oceanrep.geomar.de/id/eprint/50245/1/s41467-020-17426-8.pdf https://oceanrep.geomar.de/id/eprint/50245/2/41467_2020_17426_MOESM1_ESM.pdf https://doi.org/10.1038/s41467-020-17426-8 |
long_lat |
ENVELOPE(-8.667,-8.667,60.917,60.917) |
geographic |
Faroe Bank |
geographic_facet |
Faroe Bank |
genre |
Nordic Seas |
genre_facet |
Nordic Seas |
op_relation |
https://oceanrep.geomar.de/id/eprint/50245/1/s41467-020-17426-8.pdf https://oceanrep.geomar.de/id/eprint/50245/2/41467_2020_17426_MOESM1_ESM.pdf Chafik, L. , Hátún, H., Kjellsson, J. , Larsen, K. M. H. , Rossby, T. and Berx, B. (2020) Discovery of an unrecognized pathway carrying overflow waters toward the Faroe Bank Channel. Open Access Nature Communications, 11 (1). Art.Nr. 3721. DOI 10.1038/s41467-020-17426-8 <https://doi.org/10.1038/s41467-020-17426-8>. doi:10.1038/s41467-020-17426-8 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-020-17426-8 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766115280077979648 |