Assimilation of satellite altimetry referenced to the new GRACE geoid estimate
0094-8276 International audience [1] Currently, two satellite gravimetric missions (CHAMP, GRACE) are dedicated to the improvement of our knowledge of the geoid, and one (GOCE) is planned in the near future. This will allow the absolute altimeter ocean height measurements to be exploited, instead of...
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Online Access: | https://hal.science/hal-00409271 https://hal.science/hal-00409271/document https://hal.science/hal-00409271/file/2004GL021329.pdf https://doi.org/10.1029/2004GL021329 |
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ftinsu:oai:HAL:hal-00409271v1 2023-12-17T10:46:39+01:00 Assimilation of satellite altimetry referenced to the new GRACE geoid estimate Birol, Florence Brankart, J. M. Lemoine, J. M. Brasseur, P. Verron, J. Echanges Côte-Large (ECOLA) 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)-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)-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) Laboratoire des Ecoulements Geophysique et Industriels Groupement de Recherche en Géodésie Spatiale (GRGS) Centre National d'Études Spatiales Toulouse (CNES) 2005 https://hal.science/hal-00409271 https://hal.science/hal-00409271/document https://hal.science/hal-00409271/file/2004GL021329.pdf https://doi.org/10.1029/2004GL021329 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL021329 hal-00409271 https://hal.science/hal-00409271 https://hal.science/hal-00409271/document https://hal.science/hal-00409271/file/2004GL021329.pdf doi:10.1029/2004GL021329 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00409271 Geophysical Research Letters, 2005, 32 (6), pp.WOS:000227874400002. ⟨10.1029/2004GL021329⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2005 ftinsu https://doi.org/10.1029/2004GL021329 2023-11-22T17:37:46Z 0094-8276 International audience [1] Currently, two satellite gravimetric missions (CHAMP, GRACE) are dedicated to the improvement of our knowledge of the geoid, and one (GOCE) is planned in the near future. This will allow the absolute altimeter ocean height measurements to be exploited, instead of only sea level variations. In this paper, we evaluate the impact of the GRACE mission on ocean data assimilation. The new approach is to directly assimilate the full altimetric signal relative to the first release of a GRACE geoid. The response of an eddy-permitting ocean model of the North Atlantic to the assimilation of this altimetric signal is analysed. The results are compared to that obtained using the usual approach, i.e., the assimilation of the dynamic topography derived from the addition of altimetric sea level anomalies and a mean dynamic topography estimate. Even if the GRACE mission resolution (333 km) is not yet compatible with oceanographic studies at mid latitude, we show that the geoid estimate can already be used with success in basin scale altimetric data assimilation problems. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Geophysical Research Letters 32 6 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Birol, Florence Brankart, J. M. Lemoine, J. M. Brasseur, P. Verron, J. Assimilation of satellite altimetry referenced to the new GRACE geoid estimate |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
0094-8276 International audience [1] Currently, two satellite gravimetric missions (CHAMP, GRACE) are dedicated to the improvement of our knowledge of the geoid, and one (GOCE) is planned in the near future. This will allow the absolute altimeter ocean height measurements to be exploited, instead of only sea level variations. In this paper, we evaluate the impact of the GRACE mission on ocean data assimilation. The new approach is to directly assimilate the full altimetric signal relative to the first release of a GRACE geoid. The response of an eddy-permitting ocean model of the North Atlantic to the assimilation of this altimetric signal is analysed. The results are compared to that obtained using the usual approach, i.e., the assimilation of the dynamic topography derived from the addition of altimetric sea level anomalies and a mean dynamic topography estimate. Even if the GRACE mission resolution (333 km) is not yet compatible with oceanographic studies at mid latitude, we show that the geoid estimate can already be used with success in basin scale altimetric data assimilation problems. |
author2 |
Echanges Côte-Large (ECOLA) 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)-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)-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) Laboratoire des Ecoulements Geophysique et Industriels Groupement de Recherche en Géodésie Spatiale (GRGS) Centre National d'Études Spatiales Toulouse (CNES) |
format |
Article in Journal/Newspaper |
author |
Birol, Florence Brankart, J. M. Lemoine, J. M. Brasseur, P. Verron, J. |
author_facet |
Birol, Florence Brankart, J. M. Lemoine, J. M. Brasseur, P. Verron, J. |
author_sort |
Birol, Florence |
title |
Assimilation of satellite altimetry referenced to the new GRACE geoid estimate |
title_short |
Assimilation of satellite altimetry referenced to the new GRACE geoid estimate |
title_full |
Assimilation of satellite altimetry referenced to the new GRACE geoid estimate |
title_fullStr |
Assimilation of satellite altimetry referenced to the new GRACE geoid estimate |
title_full_unstemmed |
Assimilation of satellite altimetry referenced to the new GRACE geoid estimate |
title_sort |
assimilation of satellite altimetry referenced to the new grace geoid estimate |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00409271 https://hal.science/hal-00409271/document https://hal.science/hal-00409271/file/2004GL021329.pdf https://doi.org/10.1029/2004GL021329 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00409271 Geophysical Research Letters, 2005, 32 (6), pp.WOS:000227874400002. ⟨10.1029/2004GL021329⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL021329 hal-00409271 https://hal.science/hal-00409271 https://hal.science/hal-00409271/document https://hal.science/hal-00409271/file/2004GL021329.pdf doi:10.1029/2004GL021329 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2004GL021329 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
6 |
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1785570201917456384 |