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A numerical modelling study of upwelling filaments off the NW African coast ArchiMer
Stevens, I; Johnson, J.
A fine resolution (1/12degrees x 1/12degrees) primitive equation limited area model is constructed for the region off NW Africa in the eastern North Atlantic to examine the generation of cool upwelling filaments. A seasonal shift in the trade wind pattern leads to coastal upwelling and an equatorward coastal current. The filaments form at four preferred locations along the NW African coast between 25degreesN and 35degreesN, the largest filament being at Cape Ghir. The generation mechanism for the filaments is similar to the one proposed for filaments in the California current system. As a result of baroclinic instability meanders develop on the coastal current and transport cool upwelled water offshore to form the filaments. During the relaxation phase of...
Tipo: Text Palavras-chave: Modèle numérique; Upwelling; Meso-échelle; Afrique Nord-Ouest; Cape Ghir; Numerical model; Coastal upwelling; Mesoscale features; NW Africa; Cape Ghir.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00321/43247/42978.pdf
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