Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin
The interaction between the mesoscale eddies and the cyclonic gyre circulation of the Lofoten Basin is studied using a suite of satellite altimeters, a regional coupled ocean‐sea‐ice data assimilation system (the TOPAZ reanalysis) and Argo float data. An automated method identified 5,373/5,589 indiv...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union (AGU)
2020
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Online Access: | https://archimer.ifremer.fr/doc/00635/74707/74651.pdf https://archimer.ifremer.fr/doc/00635/74707/74652.docx https://doi.org/10.1029/2020JC016102 https://archimer.ifremer.fr/doc/00635/74707/ |
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ftarchimer:oai:archimer.ifremer.fr:74707 2023-05-15T15:18:42+02:00 Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin Raj, R. P. Halo, I. Chatterjee, S. Belonenko, T. Bakhoday‐paskyabi, M. Bashmachnikov, I. Fedorov, A. Xie, J. 2020-07 application/pdf https://archimer.ifremer.fr/doc/00635/74707/74651.pdf https://archimer.ifremer.fr/doc/00635/74707/74652.docx https://doi.org/10.1029/2020JC016102 https://archimer.ifremer.fr/doc/00635/74707/ eng eng American Geophysical Union (AGU) https://archimer.ifremer.fr/doc/00635/74707/74651.pdf https://archimer.ifremer.fr/doc/00635/74707/74652.docx doi:10.1029/2020JC016102 https://archimer.ifremer.fr/doc/00635/74707/ info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2020-07 , Vol. 125 , N. 7 , P. e2020JC016102 (13p.) mesoscale eddies Lofoten vortex Lofoten basin gyre circulation altimetry Argo floats text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.1029/2020JC016102 2023-03-14T23:55:18Z The interaction between the mesoscale eddies and the cyclonic gyre circulation of the Lofoten Basin is studied using a suite of satellite altimeters, a regional coupled ocean‐sea‐ice data assimilation system (the TOPAZ reanalysis) and Argo float data. An automated method identified 5,373/5,589 individual anticyclonic/cyclonic eddies in the Lofoten Basin from more than 65,000 altimeter‐based eddy observations, of which 70–85% are found to be nonlinear. The nonlinearity of eddies is estimated from its translational and rotational velocities. The study found clustering of highly intense nonlinear eddies on either side of the Lofoten Basin. Further, we show the distinct cyclonic drift of the anticyclonic and cyclonic eddies, both confined to the western side of the basin, and its similarity to the middepth gyre circulation also confined to the same region. A well‐defined cyclonic drift pattern of eddies is found during the time period when the gyre circulation of the basin is strengthened, while a clear cyclonic drift of eddies is absent during a weakened gyre. Analysis of barotropic energy conversion in the reanalysis data shows maximum transfer of energy from the eddy field to the mean flow in the Lofoten Vortex region. Even though comparatively smaller (roughly 9 times) there is also notable transfer of energy from the mean flow to the eddies in the region located outside the Lofoten Vortex. Our study shows that the gyre circulation when strengthened, receives more energy from the Lofoten Vortex and loses less energy to those eddies circulating around the Lofoten Vortex. Plain Language Summary Lofoten Basin situated in the path of Atlantic Water flow from the North Atlantic to the Arctic is the largest heat reservoir in the Nordic Seas. The mesoscale eddies and the gyre circulation of the basin can impact the heat transported into the basin interior and the heat lost to the atmosphere. In this paper, we use a suite of satellite altimeters, Argo floats, and an ocean reanalysis data set to study the interaction ... Article in Journal/Newspaper Arctic Lofoten Nordic Seas North Atlantic Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Lofoten Lofoten Basin ENVELOPE(4.000,4.000,70.000,70.000) Journal of Geophysical Research: Oceans 125 7 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
mesoscale eddies Lofoten vortex Lofoten basin gyre circulation altimetry Argo floats |
spellingShingle |
mesoscale eddies Lofoten vortex Lofoten basin gyre circulation altimetry Argo floats Raj, R. P. Halo, I. Chatterjee, S. Belonenko, T. Bakhoday‐paskyabi, M. Bashmachnikov, I. Fedorov, A. Xie, J. Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin |
topic_facet |
mesoscale eddies Lofoten vortex Lofoten basin gyre circulation altimetry Argo floats |
description |
The interaction between the mesoscale eddies and the cyclonic gyre circulation of the Lofoten Basin is studied using a suite of satellite altimeters, a regional coupled ocean‐sea‐ice data assimilation system (the TOPAZ reanalysis) and Argo float data. An automated method identified 5,373/5,589 individual anticyclonic/cyclonic eddies in the Lofoten Basin from more than 65,000 altimeter‐based eddy observations, of which 70–85% are found to be nonlinear. The nonlinearity of eddies is estimated from its translational and rotational velocities. The study found clustering of highly intense nonlinear eddies on either side of the Lofoten Basin. Further, we show the distinct cyclonic drift of the anticyclonic and cyclonic eddies, both confined to the western side of the basin, and its similarity to the middepth gyre circulation also confined to the same region. A well‐defined cyclonic drift pattern of eddies is found during the time period when the gyre circulation of the basin is strengthened, while a clear cyclonic drift of eddies is absent during a weakened gyre. Analysis of barotropic energy conversion in the reanalysis data shows maximum transfer of energy from the eddy field to the mean flow in the Lofoten Vortex region. Even though comparatively smaller (roughly 9 times) there is also notable transfer of energy from the mean flow to the eddies in the region located outside the Lofoten Vortex. Our study shows that the gyre circulation when strengthened, receives more energy from the Lofoten Vortex and loses less energy to those eddies circulating around the Lofoten Vortex. Plain Language Summary Lofoten Basin situated in the path of Atlantic Water flow from the North Atlantic to the Arctic is the largest heat reservoir in the Nordic Seas. The mesoscale eddies and the gyre circulation of the basin can impact the heat transported into the basin interior and the heat lost to the atmosphere. In this paper, we use a suite of satellite altimeters, Argo floats, and an ocean reanalysis data set to study the interaction ... |
format |
Article in Journal/Newspaper |
author |
Raj, R. P. Halo, I. Chatterjee, S. Belonenko, T. Bakhoday‐paskyabi, M. Bashmachnikov, I. Fedorov, A. Xie, J. |
author_facet |
Raj, R. P. Halo, I. Chatterjee, S. Belonenko, T. Bakhoday‐paskyabi, M. Bashmachnikov, I. Fedorov, A. Xie, J. |
author_sort |
Raj, R. P. |
title |
Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin |
title_short |
Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin |
title_full |
Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin |
title_fullStr |
Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin |
title_full_unstemmed |
Interaction Between Mesoscale Eddies and the Gyre Circulation in the Lofoten Basin |
title_sort |
interaction between mesoscale eddies and the gyre circulation in the lofoten basin |
publisher |
American Geophysical Union (AGU) |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00635/74707/74651.pdf https://archimer.ifremer.fr/doc/00635/74707/74652.docx https://doi.org/10.1029/2020JC016102 https://archimer.ifremer.fr/doc/00635/74707/ |
long_lat |
ENVELOPE(4.000,4.000,70.000,70.000) |
geographic |
Arctic Lofoten Lofoten Basin |
geographic_facet |
Arctic Lofoten Lofoten Basin |
genre |
Arctic Lofoten Nordic Seas North Atlantic Sea ice |
genre_facet |
Arctic Lofoten Nordic Seas North Atlantic Sea ice |
op_source |
Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2020-07 , Vol. 125 , N. 7 , P. e2020JC016102 (13p.) |
op_relation |
https://archimer.ifremer.fr/doc/00635/74707/74651.pdf https://archimer.ifremer.fr/doc/00635/74707/74652.docx doi:10.1029/2020JC016102 https://archimer.ifremer.fr/doc/00635/74707/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2020JC016102 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
7 |
_version_ |
1766348891863646208 |