| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Response of the Southern Benguela upwelling system to fine-scale modifications of the coastal wind
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| Autores: |
Desbiolles, Fabien
Blanke, Bruno
Bentamy, Abderrahim
Roy, C.
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| Data: |
2016-04
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| Ano: |
2016
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| Palavras-chave: |
Eastern boundary upwelling system
Momentum flux forcing
Wind profile
Numerical modeling
Scatterometry
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| 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| 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/
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| Editor: |
Elsevier Science Bv
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| Formato: |
application/pdf
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| Fonte: |
Journal Of Marine Systems (0924-7963) (Elsevier Science Bv), 2016-04 , Vol. 156 , P. 46-55
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| Direitos: |
2015 Elsevier B.V. All rights reserved
info:eu-repo/semantics/openAccess
restricted use
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