Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation
A 1993–1996 hindcast of the North Atlantic circulation is presented and analyzed. Multivariate satellite observations (sea surface height and sea surface temperature) are assimilated into an isopycnic coordinate ocean model (Miami Isopycnic Coordinate Ocean Model [MICOM]) using a reduced order Kalma...
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ftunivnantes:oai:HAL:hal-00212019v1 2023-05-15T17:30:54+02:00 Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation Brankart, Jean-Michel Testut, Charles-Emmanuel Brasseur, Pierre Verron, Jacques Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) 2003 https://hal.science/hal-00212019 https://doi.org/10.1029/2001JC001198 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2001JC001198 hal-00212019 https://hal.science/hal-00212019 doi:10.1029/2001JC001198 ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00212019 Journal of Geophysical Research, 2003, 108, pp.3074. ⟨10.1029/2001JC001198⟩ data assimilation ocean model Atlantic Ocean circulation [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] info:eu-repo/semantics/article Journal articles 2003 ftunivnantes https://doi.org/10.1029/2001JC001198 2023-02-08T07:42:01Z A 1993–1996 hindcast of the North Atlantic circulation is presented and analyzed. Multivariate satellite observations (sea surface height and sea surface temperature) are assimilated into an isopycnic coordinate ocean model (Miami Isopycnic Coordinate Ocean Model [MICOM]) using a reduced order Kalman filter (the SEEK filter). The objective is to validate the assimilation system in hindcast mode before running a near real‐time exercise as part of the European DIADEM project. The analysis scheme is upgraded to make the statistical parameterization as realistic as possible, and this is shown to be particularly important as soon as a multivariate data set is used. Second, the paper describes the modifications to the SEEK filter that are necessary to meet the requirements of a layered model and to benefit from the advantages of the isopycnic coordinate. In particular, the need for an initialization procedure is explained, and this dynamical adjustment is shown to be more natural and robust in the context of the isopycnic coordinate. The hindcast experiment is validated by comparisons with observations, by studying innovation statistics, and by comparing the results with independent observations (expendable bathythermograph [XBT] profiles). Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Journal of Geophysical Research 108 C3 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
data assimilation ocean model Atlantic Ocean circulation [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] |
spellingShingle |
data assimilation ocean model Atlantic Ocean circulation [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] Brankart, Jean-Michel Testut, Charles-Emmanuel Brasseur, Pierre Verron, Jacques Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation |
topic_facet |
data assimilation ocean model Atlantic Ocean circulation [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] |
description |
A 1993–1996 hindcast of the North Atlantic circulation is presented and analyzed. Multivariate satellite observations (sea surface height and sea surface temperature) are assimilated into an isopycnic coordinate ocean model (Miami Isopycnic Coordinate Ocean Model [MICOM]) using a reduced order Kalman filter (the SEEK filter). The objective is to validate the assimilation system in hindcast mode before running a near real‐time exercise as part of the European DIADEM project. The analysis scheme is upgraded to make the statistical parameterization as realistic as possible, and this is shown to be particularly important as soon as a multivariate data set is used. Second, the paper describes the modifications to the SEEK filter that are necessary to meet the requirements of a layered model and to benefit from the advantages of the isopycnic coordinate. In particular, the need for an initialization procedure is explained, and this dynamical adjustment is shown to be more natural and robust in the context of the isopycnic coordinate. The hindcast experiment is validated by comparisons with observations, by studying innovation statistics, and by comparing the results with independent observations (expendable bathythermograph [XBT] profiles). |
author2 |
Laboratoire des Écoulements Géophysiques et Industriels Grenoble (LEGI) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Brankart, Jean-Michel Testut, Charles-Emmanuel Brasseur, Pierre Verron, Jacques |
author_facet |
Brankart, Jean-Michel Testut, Charles-Emmanuel Brasseur, Pierre Verron, Jacques |
author_sort |
Brankart, Jean-Michel |
title |
Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation |
title_short |
Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation |
title_full |
Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation |
title_fullStr |
Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation |
title_full_unstemmed |
Implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: Application to a 1993-96 hindcast of the North Atlantic Ocean circulation |
title_sort |
implementation of a multivariate data assimilation scheme for isopycnic coordinate ocean models: application to a 1993-96 hindcast of the north atlantic ocean circulation |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00212019 https://doi.org/10.1029/2001JC001198 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00212019 Journal of Geophysical Research, 2003, 108, pp.3074. ⟨10.1029/2001JC001198⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2001JC001198 hal-00212019 https://hal.science/hal-00212019 doi:10.1029/2001JC001198 |
op_doi |
https://doi.org/10.1029/2001JC001198 |
container_title |
Journal of Geophysical Research |
container_volume |
108 |
container_issue |
C3 |
_version_ |
1766128028071493632 |