Eddy heat diffusion and Subantarctic Mode Water formation
International audience Subantarctic mode waters (SAMW) form in the deep winter mixed layers occuring north of the Subantarctic Front (SAF). The recent increase of hydrographic and surface drifter data in the Southern Ocean allows a better spatial representation of the distinct regions of SAMW format...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.archives-ouvertes.fr/hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593/document https://hal.archives-ouvertes.fr/hal-00282593/file/2007GL032827.pdf https://doi.org/10.1029/2007GL032827 |
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ftccsdartic:oai:HAL:hal-00282593v1 2023-05-15T18:24:58+02:00 Eddy heat diffusion and Subantarctic Mode Water formation Sallée, J.B. Morrow, R. Speer, K. Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Department of Oceanography Florida State University Tallahassee (FSU) 2008 https://hal.archives-ouvertes.fr/hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593/document https://hal.archives-ouvertes.fr/hal-00282593/file/2007GL032827.pdf https://doi.org/10.1029/2007GL032827 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GL032827 hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593/document https://hal.archives-ouvertes.fr/hal-00282593/file/2007GL032827.pdf doi:10.1029/2007GL032827 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00282593 Geophysical Research Letters, American Geophysical Union, 2008, 35, pp.L05607. ⟨10.1029/2007GL032827⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1029/2007GL032827 2021-11-21T00:07:35Z International audience Subantarctic mode waters (SAMW) form in the deep winter mixed layers occuring north of the Subantarctic Front (SAF). The recent increase of hydrographic and surface drifter data in the Southern Ocean allows a better spatial representation of the distinct regions of SAMW formation. This study focuses on the thermodynamical processes acting on the winter mixed layer heat budget. Eddy heat diffusion play a substantial role in the local heat balance, whereas its action vanishes with large-scale averaging. South of the western boundary currents and north of the SAF, the eddy heating plays an important role in specific regions, counterbalancing the cooling of the mixed layer by Ekman advection and air-sea fluxes. Specifically, the eddy diffusion term reduces the tendency for mixed layer destabilisation north of the SAF in the Western Indian Ocean downstream of the Agulhas Retroflection and in the Western Pacific downstream of Campbell Plateau. This role for mixed layer eddy fluxes emphasizes a large-scale control of mixed layer properties by topography and mesoscale processes in the Southern Ocean. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Pacific Indian Campbell Plateau ENVELOPE(171.000,171.000,-50.667,-50.667) Geophysical Research Letters 35 5 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Sallée, J.B. Morrow, R. Speer, K. Eddy heat diffusion and Subantarctic Mode Water formation |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Subantarctic mode waters (SAMW) form in the deep winter mixed layers occuring north of the Subantarctic Front (SAF). The recent increase of hydrographic and surface drifter data in the Southern Ocean allows a better spatial representation of the distinct regions of SAMW formation. This study focuses on the thermodynamical processes acting on the winter mixed layer heat budget. Eddy heat diffusion play a substantial role in the local heat balance, whereas its action vanishes with large-scale averaging. South of the western boundary currents and north of the SAF, the eddy heating plays an important role in specific regions, counterbalancing the cooling of the mixed layer by Ekman advection and air-sea fluxes. Specifically, the eddy diffusion term reduces the tendency for mixed layer destabilisation north of the SAF in the Western Indian Ocean downstream of the Agulhas Retroflection and in the Western Pacific downstream of Campbell Plateau. This role for mixed layer eddy fluxes emphasizes a large-scale control of mixed layer properties by topography and mesoscale processes in the Southern Ocean. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Department of Oceanography Florida State University Tallahassee (FSU) |
format |
Article in Journal/Newspaper |
author |
Sallée, J.B. Morrow, R. Speer, K. |
author_facet |
Sallée, J.B. Morrow, R. Speer, K. |
author_sort |
Sallée, J.B. |
title |
Eddy heat diffusion and Subantarctic Mode Water formation |
title_short |
Eddy heat diffusion and Subantarctic Mode Water formation |
title_full |
Eddy heat diffusion and Subantarctic Mode Water formation |
title_fullStr |
Eddy heat diffusion and Subantarctic Mode Water formation |
title_full_unstemmed |
Eddy heat diffusion and Subantarctic Mode Water formation |
title_sort |
eddy heat diffusion and subantarctic mode water formation |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593/document https://hal.archives-ouvertes.fr/hal-00282593/file/2007GL032827.pdf https://doi.org/10.1029/2007GL032827 |
long_lat |
ENVELOPE(171.000,171.000,-50.667,-50.667) |
geographic |
Southern Ocean Pacific Indian Campbell Plateau |
geographic_facet |
Southern Ocean Pacific Indian Campbell Plateau |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00282593 Geophysical Research Letters, American Geophysical Union, 2008, 35, pp.L05607. ⟨10.1029/2007GL032827⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007GL032827 hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593 https://hal.archives-ouvertes.fr/hal-00282593/document https://hal.archives-ouvertes.fr/hal-00282593/file/2007GL032827.pdf doi:10.1029/2007GL032827 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007GL032827 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
5 |
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1766206024247672832 |