Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy
International audience Observations made in the Scotia Sea during the May 2015 Surface Mixed Layer Evolution at Submesoscales (SMILES) research cruise captured submesoscale, O(1–10) km, variability along the periphery of a mesoscale O(10–100) km meander precisely as it separated from the Antarctic C...
Published in: | Journal of Physical Oceanography |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Subjects: | |
Online Access: | https://hal.science/hal-01629234 https://hal.science/hal-01629234/document https://hal.science/hal-01629234/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Frontal%20Circulation%20and%20Submesoscale%20Variability%20during%20the%20Formation%20of%20a%20Southern%20Ocean%20Mesoscale%20Eddy.pdf https://doi.org/10.1175/JPO-D-16-0266.1 |
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ftunivparis:oai:HAL:hal-01629234v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
Southern Ocean Eddies Instability Small scale processes Vertical motion In situ oceanic observations [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
Southern Ocean Eddies Instability Small scale processes Vertical motion In situ oceanic observations [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Adams, Katherine A. Hosegood, Philip Taylor, John R. Sallée, Jean-Baptiste Bachman, Scott Torres, Ricardo Stamper, Megan Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy |
topic_facet |
Southern Ocean Eddies Instability Small scale processes Vertical motion In situ oceanic observations [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Observations made in the Scotia Sea during the May 2015 Surface Mixed Layer Evolution at Submesoscales (SMILES) research cruise captured submesoscale, O(1–10) km, variability along the periphery of a mesoscale O(10–100) km meander precisely as it separated from the Antarctic Circumpolar Current (ACC) and formed a cyclonic eddy ~120 km in diameter. The meander developed in the Scotia Sea, an eddy-rich region east of the Drake Passage where the Subantarctic and Polar Fronts converge and modifications of Subantarctic Mode Water (SAMW) occur. In situ measurements reveal a rich submesoscale structure of temperature and salinity and a loss of frontal integrity along the newly formed southern sector of the eddy. A mathematical framework is developed to estimate vertical velocity from collocated drifter and horizontal water velocity time series, under certain simplifying assumptions appropriate for the current dataset. Upwelling (downwelling) rates of O(100) m day −1 are found in the northern (southern) eddy sector. Favorable conditions for submesoscale instabilities are found in the mixed layer, particularly at the beginning of the survey in the vicinity of density fronts. Shallower mixed layer depths and increased stratification are observed later in the survey on the inner edge of the front. Evolution in temperature–salinity (T–S) space indicates modification of water mass properties in the upper 200 m over 2 days. Modifications along σθ = 27–27.2 kg m −3 have climate-related implications for mode and intermediate water transformation in the Scotia Sea on finer spatiotemporal scales than observed previously. |
author2 |
School of Biological and Marine Science (SBMS) Plymouth University Department of Applied Mathematics and Theoretical Physics (DAMTP) University of Cambridge UK (CAM) Processus de couplage à Petite Echelle, Ecosystèmes et Prédateurs Supérieurs (PEPS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Plymouth Marine Laboratory (PML) |
format |
Article in Journal/Newspaper |
author |
Adams, Katherine A. Hosegood, Philip Taylor, John R. Sallée, Jean-Baptiste Bachman, Scott Torres, Ricardo Stamper, Megan |
author_facet |
Adams, Katherine A. Hosegood, Philip Taylor, John R. Sallée, Jean-Baptiste Bachman, Scott Torres, Ricardo Stamper, Megan |
author_sort |
Adams, Katherine A. |
title |
Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy |
title_short |
Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy |
title_full |
Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy |
title_fullStr |
Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy |
title_full_unstemmed |
Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy |
title_sort |
frontal circulation and submesoscale variability during the formation of a southern ocean mesoscale eddy |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-01629234 https://hal.science/hal-01629234/document https://hal.science/hal-01629234/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Frontal%20Circulation%20and%20Submesoscale%20Variability%20during%20the%20Formation%20of%20a%20Southern%20Ocean%20Mesoscale%20Eddy.pdf https://doi.org/10.1175/JPO-D-16-0266.1 |
genre |
Antarc* Antarctic Drake Passage Scotia Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Scotia Sea Southern Ocean |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-01629234 Journal of Physical Oceanography, 2017, 47 (7), pp.1737 - 1753. ⟨10.1175/JPO-D-16-0266.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-16-0266.1 hal-01629234 https://hal.science/hal-01629234 https://hal.science/hal-01629234/document https://hal.science/hal-01629234/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Frontal%20Circulation%20and%20Submesoscale%20Variability%20during%20the%20Formation%20of%20a%20Southern%20Ocean%20Mesoscale%20Eddy.pdf doi:10.1175/JPO-D-16-0266.1 WOS: 000405111400014 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JPO-D-16-0266.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
47 |
container_issue |
7 |
container_start_page |
1737 |
op_container_end_page |
1753 |
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1799481413346525184 |
spelling |
ftunivparis:oai:HAL:hal-01629234v1 2024-05-19T07:29:47+00:00 Frontal Circulation and Submesoscale Variability during the Formation of a Southern Ocean Mesoscale Eddy Adams, Katherine A. Hosegood, Philip Taylor, John R. Sallée, Jean-Baptiste Bachman, Scott Torres, Ricardo Stamper, Megan School of Biological and Marine Science (SBMS) Plymouth University Department of Applied Mathematics and Theoretical Physics (DAMTP) University of Cambridge UK (CAM) Processus de couplage à Petite Echelle, Ecosystèmes et Prédateurs Supérieurs (PEPS) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Plymouth Marine Laboratory (PML) 2017-07 https://hal.science/hal-01629234 https://hal.science/hal-01629234/document https://hal.science/hal-01629234/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Frontal%20Circulation%20and%20Submesoscale%20Variability%20during%20the%20Formation%20of%20a%20Southern%20Ocean%20Mesoscale%20Eddy.pdf https://doi.org/10.1175/JPO-D-16-0266.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-16-0266.1 hal-01629234 https://hal.science/hal-01629234 https://hal.science/hal-01629234/document https://hal.science/hal-01629234/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Frontal%20Circulation%20and%20Submesoscale%20Variability%20during%20the%20Formation%20of%20a%20Southern%20Ocean%20Mesoscale%20Eddy.pdf doi:10.1175/JPO-D-16-0266.1 WOS: 000405111400014 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-01629234 Journal of Physical Oceanography, 2017, 47 (7), pp.1737 - 1753. ⟨10.1175/JPO-D-16-0266.1⟩ Southern Ocean Eddies Instability Small scale processes Vertical motion In situ oceanic observations [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2017 ftunivparis https://doi.org/10.1175/JPO-D-16-0266.1 2024-04-23T03:38:45Z International audience Observations made in the Scotia Sea during the May 2015 Surface Mixed Layer Evolution at Submesoscales (SMILES) research cruise captured submesoscale, O(1–10) km, variability along the periphery of a mesoscale O(10–100) km meander precisely as it separated from the Antarctic Circumpolar Current (ACC) and formed a cyclonic eddy ~120 km in diameter. The meander developed in the Scotia Sea, an eddy-rich region east of the Drake Passage where the Subantarctic and Polar Fronts converge and modifications of Subantarctic Mode Water (SAMW) occur. In situ measurements reveal a rich submesoscale structure of temperature and salinity and a loss of frontal integrity along the newly formed southern sector of the eddy. A mathematical framework is developed to estimate vertical velocity from collocated drifter and horizontal water velocity time series, under certain simplifying assumptions appropriate for the current dataset. Upwelling (downwelling) rates of O(100) m day −1 are found in the northern (southern) eddy sector. Favorable conditions for submesoscale instabilities are found in the mixed layer, particularly at the beginning of the survey in the vicinity of density fronts. Shallower mixed layer depths and increased stratification are observed later in the survey on the inner edge of the front. Evolution in temperature–salinity (T–S) space indicates modification of water mass properties in the upper 200 m over 2 days. Modifications along σθ = 27–27.2 kg m −3 have climate-related implications for mode and intermediate water transformation in the Scotia Sea on finer spatiotemporal scales than observed previously. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Scotia Sea Southern Ocean Université de Paris: Portail HAL Journal of Physical Oceanography 47 7 1737 1753 |