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Título:
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Peru-Chile upwelling dynamics under climate change (2015)
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Autores:
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Vera Oerder, Autor ;
Colas, Francois, Autor ;
Echevin, Vincent, Autor ;
Codron, Francis, Autor ;
Tam Málaga, Jorge, Autor ;
Belmadani, Ali, Autor
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Tipo de documento:
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Article : documento electrónico
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En :
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Journal of Geophysical Research: Oceans (2015 vol. 120 nº 2, Variada)
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Artículo en la página:
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pp. 1152-1172
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Idiomas:
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Inglés
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Clasificación:
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Cambio climático
Circulación costera
Compensación geostrófica
Reducción de escala dinámica
Sistema de corrientes Perú-Chile
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Resumen:
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The consequences of global warming on the Peru-Chile Current System (PCCS) ocean circula-tion are examined with a high-resolution, eddy-resolving regional oceanic model. We performed a dynami-cal downscaling of climate scenarios from the IPSL-CM4 Coupled General Circulation Model (CGCM),corresponding to various levels of CO 2 concentrations in the atmosphere. High-resolution atmospheric forc-ing for the regional ocean model are obtained from the IPSL atmospheric model run on a stretched gridwith increased horizontal resolution in the PCCS region. When comparing future scenarios to preindustrial(PI) conditions, the circulation along the Peru and Chile coasts is strongly modified by changes in surfacewinds and increased stratification caused by the regional warming. While the coastal poleward undercur-rent is intensified, the surface equatorial coastal jet shoals and the nearshore mesoscale activity are rein-forced. Reduction in alongshore wind stress and nearshore wind stress curl drive a year-round reduction inupwelling intensity off Peru. Modifications in geostrophic circulation mitigate this upwelling decrease inlate austral summer. The depth of the upwelling source waters becomes shallower in warmer conditions,which may have a major impact on the system’s biological productivity.
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En línea:
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https://repositorio.imarpe.gob.pe/bitstream/20.500.12958/10184/1/JGR%20Oceans%20-%202015%20-%20Oerder%20-%20Peru%e2%80%90Chile%20upwelling%20dynamics%20under%20climate%20change.pdf
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