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Développement et comparaison de méthodes d'assimilation de données de rang réduit dans un modèle de circulation océanique : application à l'océan Pacifique Tropical

Abstract : This work aims at comparing reduced order sequential (SEEK filter) and variational assimilation (reduced 4D-Var) methods in a realistic configuration of the Tropical Pacific Ocean. The comparaison is first performed in a twin experiments framework. Then, real temperature data profiles are assimilated over one year. The results are then briefly validated against independant data. This study points out the difference between methods. Finally, a first experiment with an hybrid method, combining error estimation performed by the SEEK filter and the analysis performed by Reduced 4D-Var, is presented.
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https://tel.archives-ouvertes.fr/tel-00008891
Contributor : Céline Robert <>
Submitted on : Tuesday, March 29, 2005 - 3:08:44 PM
Last modification on : Wednesday, March 10, 2021 - 1:50:03 PM
Long-term archiving on: : Friday, September 14, 2012 - 12:30:10 PM

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  • HAL Id : tel-00008891, version 1

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Céline Robert. Développement et comparaison de méthodes d'assimilation de données de rang réduit dans un modèle de circulation océanique : application à l'océan Pacifique Tropical. Mathématiques [math]. Université Joseph-Fourier - Grenoble I, 2004. Français. ⟨tel-00008891⟩

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