Revised Global Wave Number Spectra From Recent Altimeter Observations
International audience Global sea surface height wave number spectra are revisited using the most recent, lower-noise satellite altimeter missions from Saral/AltiKa and Sentinel-3 and compared to Jason-2 wave number spectra. Spectral preprocessing is configured to minimize the spectral slope distort...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://insu.hal.science/insu-03670751 https://insu.hal.science/insu-03670751/document https://insu.hal.science/insu-03670751/file/JGR%20Oceans%20-%202019%20-%20Vergara%20-%20Revised%20Global%20Wave%20Number%20Spectra%20From%20Recent%20Altimeter%20Observations.pdf https://doi.org/10.1029/2018JC014844 |
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ftccsdartic:oai:HAL:insu-03670751v1 2023-12-24T10:11:07+01:00 Revised Global Wave Number Spectra From Recent Altimeter Observations Vergara, Oscar Morrow, Rosemary Pujol, Isabelle Dibarboure, Gérald Ubelmann, Clément Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-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)-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-Centre National de la Recherche Scientifique (CNRS) Centre National d'Études Spatiales Toulouse (CNES) 2019 https://insu.hal.science/insu-03670751 https://insu.hal.science/insu-03670751/document https://insu.hal.science/insu-03670751/file/JGR%20Oceans%20-%202019%20-%20Vergara%20-%20Revised%20Global%20Wave%20Number%20Spectra%20From%20Recent%20Altimeter%20Observations.pdf https://doi.org/10.1029/2018JC014844 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JC014844 insu-03670751 https://insu.hal.science/insu-03670751 https://insu.hal.science/insu-03670751/document https://insu.hal.science/insu-03670751/file/JGR%20Oceans%20-%202019%20-%20Vergara%20-%20Revised%20Global%20Wave%20Number%20Spectra%20From%20Recent%20Altimeter%20Observations.pdf BIBCODE: 2019JGRC.124.3523V doi:10.1029/2018JC014844 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03670751 Journal of Geophysical Research. Oceans, 2019, 124, pp.3523-3537. ⟨10.1029/2018JC014844⟩ satellite altimetry mesoscale variability energy cascade internal waves space oceanography [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.1029/2018JC014844 2023-11-26T00:08:30Z International audience Global sea surface height wave number spectra are revisited using the most recent, lower-noise satellite altimeter missions from Saral/AltiKa and Sentinel-3 and compared to Jason-2 wave number spectra. Spectral preprocessing is configured to minimize the spectral slope distortion in the mesoscale wavelength range. A geographically variable wavelength range is used to calculate the spectral slopes, taking into account the regional eddy length scales based on the local Rossby radius. This dynamical wavelength range increases the spectral slope by 0.5 in middle to high latitudes, compared to a fixed wavelength range, and by -1.0 to 1.0 in different regions of the intertropical band. Using this dynamical wavelength range, mean sea surface height wave number spectra for these lower-noise missions exhibit low slope values (k -2 ) in the intertropical band, values of k -11/3 in the midlatitudes, and reaches k -5 in the subpolar regions and the Antarctic circumpolar current. An important seasonality is also revealed, with mesoscale spectral slope amplitudes decreasing in winter by 0.5 to 1.5 compared to summer, for the middle- to high-energy regions. A phase-locked internal tide correction is tested but has only a small impact on the spectral slope estimates when using the dynamical wavelength range. Article in Journal/Newspaper Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Journal of Geophysical Research: Oceans 124 6 3523 3537 |
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 |
satellite altimetry mesoscale variability energy cascade internal waves space oceanography [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
satellite altimetry mesoscale variability energy cascade internal waves space oceanography [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Vergara, Oscar Morrow, Rosemary Pujol, Isabelle Dibarboure, Gérald Ubelmann, Clément Revised Global Wave Number Spectra From Recent Altimeter Observations |
topic_facet |
satellite altimetry mesoscale variability energy cascade internal waves space oceanography [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Global sea surface height wave number spectra are revisited using the most recent, lower-noise satellite altimeter missions from Saral/AltiKa and Sentinel-3 and compared to Jason-2 wave number spectra. Spectral preprocessing is configured to minimize the spectral slope distortion in the mesoscale wavelength range. A geographically variable wavelength range is used to calculate the spectral slopes, taking into account the regional eddy length scales based on the local Rossby radius. This dynamical wavelength range increases the spectral slope by 0.5 in middle to high latitudes, compared to a fixed wavelength range, and by -1.0 to 1.0 in different regions of the intertropical band. Using this dynamical wavelength range, mean sea surface height wave number spectra for these lower-noise missions exhibit low slope values (k -2 ) in the intertropical band, values of k -11/3 in the midlatitudes, and reaches k -5 in the subpolar regions and the Antarctic circumpolar current. An important seasonality is also revealed, with mesoscale spectral slope amplitudes decreasing in winter by 0.5 to 1.5 compared to summer, for the middle- to high-energy regions. A phase-locked internal tide correction is tested but has only a small impact on the spectral slope estimates when using the dynamical wavelength range. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-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)-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-Centre National de la Recherche Scientifique (CNRS) Centre National d'Études Spatiales Toulouse (CNES) |
format |
Article in Journal/Newspaper |
author |
Vergara, Oscar Morrow, Rosemary Pujol, Isabelle Dibarboure, Gérald Ubelmann, Clément |
author_facet |
Vergara, Oscar Morrow, Rosemary Pujol, Isabelle Dibarboure, Gérald Ubelmann, Clément |
author_sort |
Vergara, Oscar |
title |
Revised Global Wave Number Spectra From Recent Altimeter Observations |
title_short |
Revised Global Wave Number Spectra From Recent Altimeter Observations |
title_full |
Revised Global Wave Number Spectra From Recent Altimeter Observations |
title_fullStr |
Revised Global Wave Number Spectra From Recent Altimeter Observations |
title_full_unstemmed |
Revised Global Wave Number Spectra From Recent Altimeter Observations |
title_sort |
revised global wave number spectra from recent altimeter observations |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://insu.hal.science/insu-03670751 https://insu.hal.science/insu-03670751/document https://insu.hal.science/insu-03670751/file/JGR%20Oceans%20-%202019%20-%20Vergara%20-%20Revised%20Global%20Wave%20Number%20Spectra%20From%20Recent%20Altimeter%20Observations.pdf https://doi.org/10.1029/2018JC014844 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://insu.hal.science/insu-03670751 Journal of Geophysical Research. Oceans, 2019, 124, pp.3523-3537. ⟨10.1029/2018JC014844⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JC014844 insu-03670751 https://insu.hal.science/insu-03670751 https://insu.hal.science/insu-03670751/document https://insu.hal.science/insu-03670751/file/JGR%20Oceans%20-%202019%20-%20Vergara%20-%20Revised%20Global%20Wave%20Number%20Spectra%20From%20Recent%20Altimeter%20Observations.pdf BIBCODE: 2019JGRC.124.3523V doi:10.1029/2018JC014844 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018JC014844 |
container_title |
Journal of Geophysical Research: Oceans |
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124 |
container_issue |
6 |
container_start_page |
3523 |
op_container_end_page |
3537 |
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1786160686215200768 |