Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry
[1] 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...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.635.270 2023-05-15T13:37:45+02:00 Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry Claire Maraldi Florent Lyard Laurent Testut Richard Coleman The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.270 http://hal-ups-tlse.archives-ouvertes.fr/docs/00/76/64/66/PDF/jgrc11839.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.270 http://hal-ups-tlse.archives-ouvertes.fr/docs/00/76/64/66/PDF/jgrc11839.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal-ups-tlse.archives-ouvertes.fr/docs/00/76/64/66/PDF/jgrc11839.pdf text ftciteseerx 2016-01-08T15:40:15Z [1] 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. Text Antarc* Antarctic Unknown Antarctic Kerguelen The Antarctic |
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English |
description |
[1] 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 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Claire Maraldi Florent Lyard Laurent Testut Richard Coleman |
spellingShingle |
Claire Maraldi Florent Lyard Laurent Testut Richard Coleman Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry |
author_facet |
Claire Maraldi Florent Lyard Laurent Testut Richard Coleman |
author_sort |
Claire Maraldi |
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 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.270 http://hal-ups-tlse.archives-ouvertes.fr/docs/00/76/64/66/PDF/jgrc11839.pdf |
geographic |
Antarctic Kerguelen The Antarctic |
geographic_facet |
Antarctic Kerguelen The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://hal-ups-tlse.archives-ouvertes.fr/docs/00/76/64/66/PDF/jgrc11839.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.635.270 http://hal-ups-tlse.archives-ouvertes.fr/docs/00/76/64/66/PDF/jgrc11839.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766097325154893824 |