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Provedor de dados:  ArchiMer
País:  France
Título:  Tracking coherent structures in a regional ocean model with wavelet analysis: Application to Cape Basin eddies - art. no. C05043
Autores:  Doglioli, Andrea
Blanke, Bruno
Speich, Sabrina
Lapeyre, Guillaume
Data:  2007-05
Ano:  2007
Palavras-chave:  Southeast Atlantic ocean
Agulhas current system
Wavelet analysis
Regional modeling
Oceanic eddies
Resumo:  [1] This study is mainly aimed at proposing objective tools for the identification and tracking of three-dimensional eddy structures. It is conducted with a high-resolution numerical model of the ocean region around South Africa, and emphasis is put on Cape Basin anticyclones and cyclones thought to be actively implicated in the Indian-Atlantic interocean exchange. We settle on wavelet analysis for the decomposition and processing of successive maps of relative vorticity for a simulation run with 1/10 degrees resolution. The identification of three- dimensional coherent structures comes with the calculation of eddy trajectories and the time evolution of eddy properties. Instantaneous mass transport and momentum of eddies are calculated from the knowledge of instantaneous drift velocities, volumes, and diameters. The success of the regional model and of the analysis technique is assessed through comparisons with equivalent observations.
Tipo:  Text
Idioma:  Inglês

Editor:  American Geophysical Union
Formato:  application/pdf
Fonte:  Journal of Geophysical Research ( JGR ) - Oceans (0148-0227) (American Geophysical Union), 2007-05 , Vol. 112 , N. C5 , P. NIL_18-NIL_29
Direitos:  2007 AGU

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