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Assimilation de données par méthode variationnelle utilisant l’adjoint d’un code de circulation côtière tridimensionnel ArchiMer
Devenon, Jean-luc; Dekeyser, I; Leredde, Y; Lellouche, Jm.
The optimal control technique using an adjoint method is applied to fit the parameters of a 3-D primitive equation coastal model due to a data assimilation procedure. Two of the main unknowns of coastal modelling operations - open boundary conditions and turbulent mixing processes in stratified conditions - are successively considered. The aim of the boundary control procedure is to identify boundary forcing to ensure the best fit between data and model results by minimising a function that measures model and data discrepancies. A methodology for proceeding from the continuous to the discrete formulation of a control problem is given. The robustness of the method is tested for the typical barotropic case of a semi-enclosed basin Kelvin wave. The data...
Tipo: Text Palavras-chave: Data assimilation; 3-D coastal circulation; Boundary conditions fitting; Adjoint method; Turbulence; Data assimilation; 3-D coastal circulation; Boundary conditions fitting; Adjoint method; Turbulence.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43337/42890.pdf
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