Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry
International audience A barotropic tidal model, with a parameterization term to account for the internal wave drag energy dissipation, is used to examine areas of possible M2 internal tide generation in the Kerguelen Plateau region. Barotropic energy flux and a distribution of wave drag dissipation...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://hal.science/hal-00766466 https://hal.science/hal-00766466/document https://hal.science/hal-00766466/file/jgrc11839.pdf https://doi.org/10.1029/2010JC006515 |
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ftunivnantes:oai:HAL:hal-00766466v1 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Maraldi, Claire Lyard, Florent Testut, Laurent Coleman, Richard Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience A barotropic tidal model, with a parameterization term to account for the internal wave drag energy dissipation, is used to examine areas of possible M2 internal tide generation in the Kerguelen Plateau region. Barotropic energy flux and a distribution of wave drag dissipation are computed. The results suggest important conversion of barotropic energy into baroclinic tide generation over the northern Kerguelen Plateau shelf break, consistent with a theoretical criterion based on ocean stratification, tidal forcing frequency, and bathymetric gradients. The sea surface height signatures of time-coherent internal tides are studied using TOPEX/Poseidon and Jason-1 altimeter data, whose ascending tracks cross nearly perpendicular to the eastern and western Kerguelen Plateau shelf break. Oscillations of a few centimeters associated with phase-locked internal tides propagate away from the plateau over distances of several hundred kilometers with a ∼110 km wavelength. When reaching the frontal area of the Antarctic Circumpolar Current, the internal tide cannot be identified because of the aliasing of mesoscale variability into the same alias band as M2. Finally, using altimeter data, we estimate the M2 barotropic tidal power converted through the internal tide generation process. We find consistent values with the barotropic model parameterization estimation, which is also in good agreement with global internal tide model estimates. Combined with modeling, this study has shown that altimetry can be used to estimate internal tide dissipation |
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) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Echanges Côte-Large (ECOLA) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Océan du Large et Variabilité Climatique (OLVAC) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) |
format |
Article in Journal/Newspaper |
author |
Maraldi, Claire Lyard, Florent Testut, Laurent Coleman, Richard |
author_facet |
Maraldi, Claire Lyard, Florent Testut, Laurent Coleman, Richard |
author_sort |
Maraldi, Claire |
title |
Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
title_short |
Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
title_full |
Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
title_fullStr |
Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
title_full_unstemmed |
Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
title_sort |
energetics of internal tides around the kerguelen plateau from modeling and altimetry |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00766466 https://hal.science/hal-00766466/document https://hal.science/hal-00766466/file/jgrc11839.pdf https://doi.org/10.1029/2010JC006515 |
geographic |
Antarctic Kerguelen The Antarctic |
geographic_facet |
Antarctic Kerguelen The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00766466 Journal of Geophysical Research, 2011, 116 (C06004), pp.10. ⟨10.1029/2010JC006515⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JC006515 hal-00766466 https://hal.science/hal-00766466 https://hal.science/hal-00766466/document https://hal.science/hal-00766466/file/jgrc11839.pdf doi:10.1029/2010JC006515 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2010JC006515 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
C6 |
_version_ |
1766266552970117120 |
spelling |
ftunivnantes:oai:HAL:hal-00766466v1 2023-05-15T13:58:19+02:00 Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry Maraldi, Claire Lyard, Florent Testut, Laurent Coleman, Richard 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) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Echanges Côte-Large (ECOLA) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Océan du Large et Variabilité Climatique (OLVAC) Antarctic Climate and Ecosystems Cooperative Research Centre (ACE-CRC) 2011 https://hal.science/hal-00766466 https://hal.science/hal-00766466/document https://hal.science/hal-00766466/file/jgrc11839.pdf https://doi.org/10.1029/2010JC006515 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2010JC006515 hal-00766466 https://hal.science/hal-00766466 https://hal.science/hal-00766466/document https://hal.science/hal-00766466/file/jgrc11839.pdf doi:10.1029/2010JC006515 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00766466 Journal of Geophysical Research, 2011, 116 (C06004), pp.10. ⟨10.1029/2010JC006515⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2011 ftunivnantes https://doi.org/10.1029/2010JC006515 2023-02-22T00:06:08Z International audience A barotropic tidal model, with a parameterization term to account for the internal wave drag energy dissipation, is used to examine areas of possible M2 internal tide generation in the Kerguelen Plateau region. Barotropic energy flux and a distribution of wave drag dissipation are computed. The results suggest important conversion of barotropic energy into baroclinic tide generation over the northern Kerguelen Plateau shelf break, consistent with a theoretical criterion based on ocean stratification, tidal forcing frequency, and bathymetric gradients. The sea surface height signatures of time-coherent internal tides are studied using TOPEX/Poseidon and Jason-1 altimeter data, whose ascending tracks cross nearly perpendicular to the eastern and western Kerguelen Plateau shelf break. Oscillations of a few centimeters associated with phase-locked internal tides propagate away from the plateau over distances of several hundred kilometers with a ∼110 km wavelength. When reaching the frontal area of the Antarctic Circumpolar Current, the internal tide cannot be identified because of the aliasing of mesoscale variability into the same alias band as M2. Finally, using altimeter data, we estimate the M2 barotropic tidal power converted through the internal tide generation process. We find consistent values with the barotropic model parameterization estimation, which is also in good agreement with global internal tide model estimates. Combined with modeling, this study has shown that altimetry can be used to estimate internal tide dissipation Article in Journal/Newspaper Antarc* Antarctic Université de Nantes: HAL-UNIV-NANTES Antarctic Kerguelen The Antarctic Journal of Geophysical Research 116 C6 |