Data/hora: 04/06/2024 01:30:13

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Response of the Southern Benguela upwelling system to fine-scale modifications of the coastal wind
Autores: | Desbiolles, Fabien; Blanke, Bruno; Bentamy, Abderrahim; Roy, C.
Data: | 2016-04
Ano: | 2016
Palavras-chave: | Eastern boundary upwelling system; Momentum flux forcing; Wind profile; Numerical modeling; Scatterometry.
Resumo: | We analyze the results of a regional model of the Southern Benguela upwelling system forced by wind stress fields derived from QuikSCAT observations. Two different horizontal resolutions are considered for the wind stress: QS25 and QS50, corresponding to native 25 and 50 km grids, respectively. The differences between both products highlight the primary importance of fine-scale momentum fluxes for both the structure and intensity of the wind- and wind curl-driven upwelling. Using QS25, we show that the coastal Ekman transport is reduced, leading to a warmer SST and a reduced oceanic coastal jet. QS25 finer wind stress curl patterns also favor the development of a stronger and shallower poleward undercurrent. The addition of a coastal wind correction to QS25 lets us investigate the possible implications of an imbalance between Ekman transport and Ekman pumping: a wind reduction in the coastal band often reduces the SST cooling, but the two mechanisms compensate each other when the characteristic length scales of the coastal upwelling and the orography-induced wind drop-off are similar.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00302/41339/40525.pdf

DOI:10.1016/j.jmarsys.2015.12.002

https://archimer.ifremer.fr/doc/00302/41339/

Editor: | Elsevier Science Bv
Formato: | application/pdf
Fonte: | Journal Of Marine Systems (0924-7963) (Elsevier Science Bv), 2016-04 , Vol. 156 , P. 46-55

Fonte:

2015 Elsevier B.V. All rights reserved

info:eu-repo/semantics/openAccess

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