Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure
International audience Satellite altimetry has been recording the surface signature of planetary waves in the world's oceans since 1992. These observations have highlighted the limits of standard theories about planetary waves, and stimulated the development of new ones, both of which emphazize...
Main Authors: | , , |
---|---|
Other Authors: | , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2007
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052/document https://hal.archives-ouvertes.fr/hal-00267052/file/Lecointre.pdf |
id |
ftccsdartic:oai:HAL:hal-00267052v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00267052v1 2023-05-15T17:31:08+02:00 Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure Lecointre, Albanne Penduff, Thierry Cipollini, Paolo Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) Hobart, Australia 2007-03-12 https://hal.archives-ouvertes.fr/hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052/document https://hal.archives-ouvertes.fr/hal-00267052/file/Lecointre.pdf en eng HAL CCSD hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052/document https://hal.archives-ouvertes.fr/hal-00267052/file/Lecointre.pdf http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess Ocean Surface Topography Science Team (OST/ST) Meeting https://hal.archives-ouvertes.fr/hal-00267052 Ocean Surface Topography Science Team (OST/ST) Meeting, Mar 2007, Hobart, Australia. 2007 [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/conferenceObject Poster communications 2007 ftccsdartic 2021-10-24T01:47:31Z International audience Satellite altimetry has been recording the surface signature of planetary waves in the world's oceans since 1992. These observations have highlighted the limits of standard theories about planetary waves, and stimulated the development of new ones, both of which emphazize the importance of subsurface features, i.e. the impact of baroclinic shears and bottom topography. However, the subsurface structure of these waves is still poorly known, and realistic numerical simulations have a clear potential for such a 3D investigation. The present study focuses on the North Atlantic subtropics, and makes use of altimeter (Topex/Poseidon + ERS) sea-level anomalies (SLA) and of a 1/6° realistic Atlantic simulation performed during the French Clipper project. Westward-propagating surface structures are tracked over the period 1993-2000 from both observed and simulated SLAs. Our method, based on the Radon Transform, has been improved to extract the first baroclinic mode of the planetary waves. This surface validation of observed and simulated waves is done in terms of zonal phase speeds and amplitudes, and reveals the realism of modelled waves. The same analysis is thus extended below the surface. Our analysis highlights the complex structure of simulated waves in the vertical, the impact of the Mid-Atlantic Ridge, and might help support theoretical investigations. Conference Object North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Mid-Atlantic Ridge |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Lecointre, Albanne Penduff, Thierry Cipollini, Paolo Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure |
topic_facet |
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Satellite altimetry has been recording the surface signature of planetary waves in the world's oceans since 1992. These observations have highlighted the limits of standard theories about planetary waves, and stimulated the development of new ones, both of which emphazize the importance of subsurface features, i.e. the impact of baroclinic shears and bottom topography. However, the subsurface structure of these waves is still poorly known, and realistic numerical simulations have a clear potential for such a 3D investigation. The present study focuses on the North Atlantic subtropics, and makes use of altimeter (Topex/Poseidon + ERS) sea-level anomalies (SLA) and of a 1/6° realistic Atlantic simulation performed during the French Clipper project. Westward-propagating surface structures are tracked over the period 1993-2000 from both observed and simulated SLAs. Our method, based on the Radon Transform, has been improved to extract the first baroclinic mode of the planetary waves. This surface validation of observed and simulated waves is done in terms of zonal phase speeds and amplitudes, and reveals the realism of modelled waves. The same analysis is thus extended below the surface. Our analysis highlights the complex structure of simulated waves in the vertical, the impact of the Mid-Atlantic Ridge, and might help support theoretical investigations. |
author2 |
Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF) |
format |
Conference Object |
author |
Lecointre, Albanne Penduff, Thierry Cipollini, Paolo |
author_facet |
Lecointre, Albanne Penduff, Thierry Cipollini, Paolo |
author_sort |
Lecointre, Albanne |
title |
Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure |
title_short |
Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure |
title_full |
Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure |
title_fullStr |
Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure |
title_full_unstemmed |
Characteristics of planetary waves in the North Atlantic from altimetry and the CLIPPER 1/6° model: Surface validation and subsurface structure |
title_sort |
characteristics of planetary waves in the north atlantic from altimetry and the clipper 1/6° model: surface validation and subsurface structure |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.archives-ouvertes.fr/hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052/document https://hal.archives-ouvertes.fr/hal-00267052/file/Lecointre.pdf |
op_coverage |
Hobart, Australia |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Ocean Surface Topography Science Team (OST/ST) Meeting https://hal.archives-ouvertes.fr/hal-00267052 Ocean Surface Topography Science Team (OST/ST) Meeting, Mar 2007, Hobart, Australia. 2007 |
op_relation |
hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052 https://hal.archives-ouvertes.fr/hal-00267052/document https://hal.archives-ouvertes.fr/hal-00267052/file/Lecointre.pdf |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
_version_ |
1766128458566467584 |