Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry
International audience We investigate statistical properties of surface currents as well as coherent mesoscale eddies in the seasonally ice-covered Southern Ocean. Based on a recent regional Sea Level Anomaly satellite altimetry data set, we compute Eddy Kinetic Energy (EKE) and detect mesoscale edd...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2023
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Subjects: | |
Online Access: | https://insu.hal.science/insu-04139559 https://insu.hal.science/insu-04139559/document https://insu.hal.science/insu-04139559/file/JGR%20Oceans%20-%202023%20-%20Auger%20-%20Southern%20Ocean%20Ice%E2%80%90Covered%20Eddy%20Properties%20From%20Satellite%20Altimetry.pdf https://doi.org/10.1029/2022JC019363 |
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ftinsu:oai:HAL:insu-04139559v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Earth Science [SDU]Sciences of the Universe [physics] Auger, Matthis Sallée, Jean-Baptiste Thompson, Andrew F. Pauthenet, Etienne Prandi, Pierre Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry |
topic_facet |
Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience We investigate statistical properties of surface currents as well as coherent mesoscale eddies in the seasonally ice-covered Southern Ocean. Based on a recent regional Sea Level Anomaly satellite altimetry data set, we compute Eddy Kinetic Energy (EKE) and detect mesoscale eddies. EKE is about one order of magnitude higher in the northern sector of the subpolar basin and over the continental slope, as compared to the middle of the subpolar gyres. An eddy detection methodology reveals that eddies are distributed evenly in the subpolar Southern Ocean, and their amplitude follows the spatial pattern of EKE. In addition to regional circulation variations, sea ice concentration arises as an important driver of eddy properties. Eddies have low amplitude and density in the pack ice, in particular in the middle of the gyres where the background circulation is unfavorable for instabilities. In contrast, the northern part of the Marginal Ice Zone is favorable for mesoscale eddies, especially cyclonic. There, eddies are stronger and their density is higher than in any other region of the ice-covered or ice-free subpolar Southern Ocean. This region is expected to be a site of frontogenesis due to sea ice melt and upwelling generated from interactions between the wind and the sea ice. While many mesoscale eddies will fall below detection level due to the small Rossby radius at high latitudes, these results contribute to understanding the interactions between mesoscale eddies, sea ice, and the background circulation in the subpolar region. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) University of Tasmania Hobart, Australia (UTAS) Processus et interactions de fine échelle océanique (PROTEO) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) California Institute of Technology (CALTECH) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Collecte Localisation Satellites Toulouse (CLS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National d'Études Spatiales Toulouse (CNES) European Project: 821001,SO-CHIC(2019) |
format |
Article in Journal/Newspaper |
author |
Auger, Matthis Sallée, Jean-Baptiste Thompson, Andrew F. Pauthenet, Etienne Prandi, Pierre |
author_facet |
Auger, Matthis Sallée, Jean-Baptiste Thompson, Andrew F. Pauthenet, Etienne Prandi, Pierre |
author_sort |
Auger, Matthis |
title |
Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry |
title_short |
Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry |
title_full |
Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry |
title_fullStr |
Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry |
title_full_unstemmed |
Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry |
title_sort |
southern ocean ice-covered eddy properties from satellite altimetry |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04139559 https://insu.hal.science/insu-04139559/document https://insu.hal.science/insu-04139559/file/JGR%20Oceans%20-%202023%20-%20Auger%20-%20Southern%20Ocean%20Ice%E2%80%90Covered%20Eddy%20Properties%20From%20Satellite%20Altimetry.pdf https://doi.org/10.1029/2022JC019363 |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-04139559 Journal of Geophysical Research. Oceans, 2023, 128, ⟨10.1029/2022JC019363⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022JC019363 info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC insu-04139559 https://insu.hal.science/insu-04139559 https://insu.hal.science/insu-04139559/document https://insu.hal.science/insu-04139559/file/JGR%20Oceans%20-%202023%20-%20Auger%20-%20Southern%20Ocean%20Ice%E2%80%90Covered%20Eddy%20Properties%20From%20Satellite%20Altimetry.pdf BIBCODE: 2023JGRC.12819363A doi:10.1029/2022JC019363 IRD: fdi:010088074 WOS: 001000242700001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2022JC019363 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
128 |
container_issue |
4 |
_version_ |
1796953039979937792 |
spelling |
ftinsu:oai:HAL:insu-04139559v1 2024-04-21T08:11:17+00:00 Southern Ocean Ice-Covered Eddy Properties From Satellite Altimetry Auger, Matthis Sallée, Jean-Baptiste Thompson, Andrew F. Pauthenet, Etienne Prandi, Pierre Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) University of Tasmania Hobart, Australia (UTAS) Processus et interactions de fine échelle océanique (PROTEO) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) California Institute of Technology (CALTECH) Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Collecte Localisation Satellites Toulouse (CLS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National d'Études Spatiales Toulouse (CNES) European Project: 821001,SO-CHIC(2019) 2023 https://insu.hal.science/insu-04139559 https://insu.hal.science/insu-04139559/document https://insu.hal.science/insu-04139559/file/JGR%20Oceans%20-%202023%20-%20Auger%20-%20Southern%20Ocean%20Ice%E2%80%90Covered%20Eddy%20Properties%20From%20Satellite%20Altimetry.pdf https://doi.org/10.1029/2022JC019363 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2022JC019363 info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC insu-04139559 https://insu.hal.science/insu-04139559 https://insu.hal.science/insu-04139559/document https://insu.hal.science/insu-04139559/file/JGR%20Oceans%20-%202023%20-%20Auger%20-%20Southern%20Ocean%20Ice%E2%80%90Covered%20Eddy%20Properties%20From%20Satellite%20Altimetry.pdf BIBCODE: 2023JGRC.12819363A doi:10.1029/2022JC019363 IRD: fdi:010088074 WOS: 001000242700001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-04139559 Journal of Geophysical Research. Oceans, 2023, 128, ⟨10.1029/2022JC019363⟩ Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.1029/2022JC019363 2024-04-05T00:29:02Z International audience We investigate statistical properties of surface currents as well as coherent mesoscale eddies in the seasonally ice-covered Southern Ocean. Based on a recent regional Sea Level Anomaly satellite altimetry data set, we compute Eddy Kinetic Energy (EKE) and detect mesoscale eddies. EKE is about one order of magnitude higher in the northern sector of the subpolar basin and over the continental slope, as compared to the middle of the subpolar gyres. An eddy detection methodology reveals that eddies are distributed evenly in the subpolar Southern Ocean, and their amplitude follows the spatial pattern of EKE. In addition to regional circulation variations, sea ice concentration arises as an important driver of eddy properties. Eddies have low amplitude and density in the pack ice, in particular in the middle of the gyres where the background circulation is unfavorable for instabilities. In contrast, the northern part of the Marginal Ice Zone is favorable for mesoscale eddies, especially cyclonic. There, eddies are stronger and their density is higher than in any other region of the ice-covered or ice-free subpolar Southern Ocean. This region is expected to be a site of frontogenesis due to sea ice melt and upwelling generated from interactions between the wind and the sea ice. While many mesoscale eddies will fall below detection level due to the small Rossby radius at high latitudes, these results contribute to understanding the interactions between mesoscale eddies, sea ice, and the background circulation in the subpolar region. Article in Journal/Newspaper Sea ice Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Oceans 128 4 |