Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica
Mesoscale eddies are abundant over the Antarctic continental slope, with the potential to regulate the water masses transport, mixing, and energy transfer. Over the relatively cold and fresh shelf regions around the Antarctic margins, in the absence of dense overflows, the baroclinic instability of...
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Online Access: | http://dx.doi.org/10.3389/feart.2022.916398 https://www.frontiersin.org/articles/10.3389/feart.2022.916398/full |
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crfrontiers:10.3389/feart.2022.916398 2024-09-30T14:26:29+00:00 Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica Zhang, Li Liu, Chengyan Sun, Wenjin Wang, Zhaomin Liang, Xi Li, Xiang Cheng, Chen National Natural Science Foundation of China 2022 http://dx.doi.org/10.3389/feart.2022.916398 https://www.frontiersin.org/articles/10.3389/feart.2022.916398/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 10 ISSN 2296-6463 journal-article 2022 crfrontiers https://doi.org/10.3389/feart.2022.916398 2024-09-03T04:04:36Z Mesoscale eddies are abundant over the Antarctic continental slope, with the potential to regulate the water masses transport, mixing, and energy transfer. Over the relatively cold and fresh shelf regions around the Antarctic margins, in the absence of dense overflows, the baroclinic instability of the Antarctic Slope Current is still favorable in the generation of mesoscale eddies. However, mesoscale eddies are barely observed over the fresh shelf regions due to the sparsity of in situ hydrographic observations. Based on an idealized eddy-resolving coupled ocean-ice shelf model, this study investigates the characteristics of mesoscale eddies and corresponding influences on the local hydrographic properties over the continental slope, East Antarctica. With the aid of an automated eddy detection algorithm, bowl-shaped eddies are identified from the simulated velocity vector geometry. The Cyclonic Eddies (CE) has a barotropic vertical structure extending to more than 2,500 m depth, while the vertical shear of the Anticyclonic Eddies (AE) velocity is strong at the upper 200 m layer. Mesoscale eddies can trap the cold and fresh water in the southern flank of the Antarctic slope front and flow offshore to the relatively warm and saline region. Therefore, the influences of eddies on the hydrographic properties are not only governed by the eddy polarities but also the eddy-induced heat and salt transport. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Shelf Frontiers (Publisher) Antarctic East Antarctica The Antarctic Frontiers in Earth Science 10 |
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Mesoscale eddies are abundant over the Antarctic continental slope, with the potential to regulate the water masses transport, mixing, and energy transfer. Over the relatively cold and fresh shelf regions around the Antarctic margins, in the absence of dense overflows, the baroclinic instability of the Antarctic Slope Current is still favorable in the generation of mesoscale eddies. However, mesoscale eddies are barely observed over the fresh shelf regions due to the sparsity of in situ hydrographic observations. Based on an idealized eddy-resolving coupled ocean-ice shelf model, this study investigates the characteristics of mesoscale eddies and corresponding influences on the local hydrographic properties over the continental slope, East Antarctica. With the aid of an automated eddy detection algorithm, bowl-shaped eddies are identified from the simulated velocity vector geometry. The Cyclonic Eddies (CE) has a barotropic vertical structure extending to more than 2,500 m depth, while the vertical shear of the Anticyclonic Eddies (AE) velocity is strong at the upper 200 m layer. Mesoscale eddies can trap the cold and fresh water in the southern flank of the Antarctic slope front and flow offshore to the relatively warm and saline region. Therefore, the influences of eddies on the hydrographic properties are not only governed by the eddy polarities but also the eddy-induced heat and salt transport. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Zhang, Li Liu, Chengyan Sun, Wenjin Wang, Zhaomin Liang, Xi Li, Xiang Cheng, Chen |
spellingShingle |
Zhang, Li Liu, Chengyan Sun, Wenjin Wang, Zhaomin Liang, Xi Li, Xiang Cheng, Chen Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica |
author_facet |
Zhang, Li Liu, Chengyan Sun, Wenjin Wang, Zhaomin Liang, Xi Li, Xiang Cheng, Chen |
author_sort |
Zhang, Li |
title |
Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica |
title_short |
Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica |
title_full |
Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica |
title_fullStr |
Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica |
title_full_unstemmed |
Modeling Mesoscale Eddies Generated Over the Continental Slope, East Antarctica |
title_sort |
modeling mesoscale eddies generated over the continental slope, east antarctica |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/feart.2022.916398 https://www.frontiersin.org/articles/10.3389/feart.2022.916398/full |
geographic |
Antarctic East Antarctica The Antarctic |
geographic_facet |
Antarctic East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf |
op_source |
Frontiers in Earth Science volume 10 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2022.916398 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
_version_ |
1811646801973870592 |