Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020)
Atlantic Water (AW) enters the Arctic through Fram Strait as the West Spitsbergen Current (WSC). When reaching the south of Yermak Plateau, the WSC splits into the Svalbard, Yermak Pass and Yermak Branches. Downstream of Yermak Plateau, AW pathways remain unclear and uncertainties persist on how AW...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
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Online Access: | http://hdl.handle.net/10553/76682 https://doi.org/10.1029/2020JC016825 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/76682 2023-05-15T15:00:31+02:00 Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) Athanase, M. Provost, C. Artana , C. Pérez-Hernández, M. D. Sennéchael, N. Bertosio, Cé. Garric G. Lellouche J.M. Prandi P. 57204697170 7004407606 57190217557 50861902200 6505793907 57215903835 6506746279 7004222439 26538038500 BU-BAS 2021 http://hdl.handle.net/10553/76682 https://doi.org/10.1029/2020JC016825 eng eng Journal of geophysical research. Oceans 126 2169-9275 Scopus http://hdl.handle.net/10553/76682 doi:10.1029/2020JC016825 85101335705 2169-9291 1 Sí Journal of Geophysical Research: Oceans [ISSN 2169-9275], v. 126 (1), e2020JC016825, (Enero 2021) 251007 Oceanografía física Arctic Ocean Atlantic Water Circulation Volume Transport Changes Operational model info:eu-repo/semantics/Article Article 2021 ftunivlaspalmas https://doi.org/10.1029/2020JC016825 2021-04-27T23:10:16Z Atlantic Water (AW) enters the Arctic through Fram Strait as the West Spitsbergen Current (WSC). When reaching the south of Yermak Plateau, the WSC splits into the Svalbard, Yermak Pass and Yermak Branches. Downstream of Yermak Plateau, AW pathways remain unclear and uncertainties persist on how AW branches eventually merge and contribute to the boundary current along the continental slope. We took advantage of the good performance of the 1/12° Mercator Ocean model in the Western Nansen Basin (WNB) to examine the AW circulation and volume transports in the area. The model showed that the circulation changed in 2008‐2020. The Yermak Branch strengthened over the northern Yermak Plateau, feeding the Return Yermak Branch along the eastern flank of the Plateau. Coincidently, AW recirculations towards Fram Strait shifted further north. Downstream of the Yermak Plateau, an offshore current developed above the 3800 m isobath, fed by waters from the Yermak Plateau tip. East of 18°E, enhanced mesoscale activity from the boundary current injected additional AW basin‐ward, further contributing to the offshore circulation. A recurrent anticyclonic circulation in Sofia Deep developed, which also occasionally fed the western part of the offshore flow. West of Yermak Plateau, the Transpolar Drift likely shifted westward while AW recirculations progressed further north. The intensification of the circulation coincided with an overall warming in the upper WNB (0‐1000 m), consistent with the progression of AW. This regional description of the changing circulation provides a background for the interpretation of upcoming observations. 52 Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Nansen Basin Svalbard Yermak plateau Spitsbergen Universidad de Las Palmas de Gran Canaria: Acceda Arctic Arctic Ocean Svalbard Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Journal of Geophysical Research: Oceans 126 1 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251007 Oceanografía física Arctic Ocean Atlantic Water Circulation Volume Transport Changes Operational model |
spellingShingle |
251007 Oceanografía física Arctic Ocean Atlantic Water Circulation Volume Transport Changes Operational model Athanase, M. Provost, C. Artana , C. Pérez-Hernández, M. D. Sennéchael, N. Bertosio, Cé. Garric G. Lellouche J.M. Prandi P. Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) |
topic_facet |
251007 Oceanografía física Arctic Ocean Atlantic Water Circulation Volume Transport Changes Operational model |
description |
Atlantic Water (AW) enters the Arctic through Fram Strait as the West Spitsbergen Current (WSC). When reaching the south of Yermak Plateau, the WSC splits into the Svalbard, Yermak Pass and Yermak Branches. Downstream of Yermak Plateau, AW pathways remain unclear and uncertainties persist on how AW branches eventually merge and contribute to the boundary current along the continental slope. We took advantage of the good performance of the 1/12° Mercator Ocean model in the Western Nansen Basin (WNB) to examine the AW circulation and volume transports in the area. The model showed that the circulation changed in 2008‐2020. The Yermak Branch strengthened over the northern Yermak Plateau, feeding the Return Yermak Branch along the eastern flank of the Plateau. Coincidently, AW recirculations towards Fram Strait shifted further north. Downstream of the Yermak Plateau, an offshore current developed above the 3800 m isobath, fed by waters from the Yermak Plateau tip. East of 18°E, enhanced mesoscale activity from the boundary current injected additional AW basin‐ward, further contributing to the offshore circulation. A recurrent anticyclonic circulation in Sofia Deep developed, which also occasionally fed the western part of the offshore flow. West of Yermak Plateau, the Transpolar Drift likely shifted westward while AW recirculations progressed further north. The intensification of the circulation coincided with an overall warming in the upper WNB (0‐1000 m), consistent with the progression of AW. This regional description of the changing circulation provides a background for the interpretation of upcoming observations. 52 |
author2 |
57204697170 7004407606 57190217557 50861902200 6505793907 57215903835 6506746279 7004222439 26538038500 BU-BAS |
format |
Article in Journal/Newspaper |
author |
Athanase, M. Provost, C. Artana , C. Pérez-Hernández, M. D. Sennéchael, N. Bertosio, Cé. Garric G. Lellouche J.M. Prandi P. |
author_facet |
Athanase, M. Provost, C. Artana , C. Pérez-Hernández, M. D. Sennéchael, N. Bertosio, Cé. Garric G. Lellouche J.M. Prandi P. |
author_sort |
Athanase, M. |
title |
Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) |
title_short |
Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) |
title_full |
Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) |
title_fullStr |
Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) |
title_full_unstemmed |
Changes in Atlantic water circulation patterns and volume transports north of Svalbard over the last 12 years (2008‐2020) |
title_sort |
changes in atlantic water circulation patterns and volume transports north of svalbard over the last 12 years (2008‐2020) |
publishDate |
2021 |
url |
http://hdl.handle.net/10553/76682 https://doi.org/10.1029/2020JC016825 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Svalbard Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Svalbard Yermak Plateau |
genre |
Arctic Arctic Ocean Fram Strait Nansen Basin Svalbard Yermak plateau Spitsbergen |
genre_facet |
Arctic Arctic Ocean Fram Strait Nansen Basin Svalbard Yermak plateau Spitsbergen |
op_source |
Journal of Geophysical Research: Oceans [ISSN 2169-9275], v. 126 (1), e2020JC016825, (Enero 2021) |
op_relation |
Journal of geophysical research. Oceans 126 2169-9275 Scopus http://hdl.handle.net/10553/76682 doi:10.1029/2020JC016825 85101335705 2169-9291 1 Sí |
op_doi |
https://doi.org/10.1029/2020JC016825 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
1 |
_version_ |
1766332605453565952 |