ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC

We investigate the oceanic circulation in the South-East Pacific (SEP) and Peru-Chile coastal upwelling, using satellite data and a medium resolution, eddy permitting regional model. The data consist in ERS 1 and 2 derived winds and AVHRR SST. Ekman pumping and transport are first calculated from wi...

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Autores principales:	Croquette,Marie, Eldin,Gérard, Echevin,Vincent
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2004
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200025
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spelling	oai:scielo:S0717-653820040002000252005-05-16ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFICCroquette,MarieEldin,GérardEchevin,VincentWe investigate the oceanic circulation in the South-East Pacific (SEP) and Peru-Chile coastal upwelling, using satellite data and a medium resolution, eddy permitting regional model. The data consist in ERS 1 and 2 derived winds and AVHRR SST. Ekman pumping and transport are first calculated from wind data and analysed. Results are compared to the estimate of the zonal extension of upwelling cells obtained from SST data. The time variability of these parameters confirms that the northern and southern parts of the region have different characteristics. Namely, in the northern part, the seasonal cycles of SST and Ekman pumping are not correlated whereas in the southern part, the Ekman transport, pumping and the zonal extension of SST fluctuations exhibit a large coherency. In particular, the maximum in zonal extension takes place during the upwelling favourable conditions (spring to early fall). In an intermediate region satellite derived wind data were not representative of coastal conditions as shown by data from land stations. These observations are compared to model outputs: relations between seasonal and interannual variability of the upwelling with model current variability are derivedinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.68 n.2 suppl.TIProc 20042004-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200025en10.4067/S0717-65382004000200025
institution	Scielo Chile
collection	Scielo Chile
language	English
description	We investigate the oceanic circulation in the South-East Pacific (SEP) and Peru-Chile coastal upwelling, using satellite data and a medium resolution, eddy permitting regional model. The data consist in ERS 1 and 2 derived winds and AVHRR SST. Ekman pumping and transport are first calculated from wind data and analysed. Results are compared to the estimate of the zonal extension of upwelling cells obtained from SST data. The time variability of these parameters confirms that the northern and southern parts of the region have different characteristics. Namely, in the northern part, the seasonal cycles of SST and Ekman pumping are not correlated whereas in the southern part, the Ekman transport, pumping and the zonal extension of SST fluctuations exhibit a large coherency. In particular, the maximum in zonal extension takes place during the upwelling favourable conditions (spring to early fall). In an intermediate region satellite derived wind data were not representative of coastal conditions as shown by data from land stations. These observations are compared to model outputs: relations between seasonal and interannual variability of the upwelling with model current variability are derived
author	Croquette,Marie Eldin,Gérard Echevin,Vincent
spellingShingle	Croquette,Marie Eldin,Gérard Echevin,Vincent ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC
author_facet	Croquette,Marie Eldin,Gérard Echevin,Vincent
author_sort	Croquette,Marie
title	ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC
title_short	ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC
title_full	ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC
title_fullStr	ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC
title_full_unstemmed	ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC
title_sort	on the contributions of ekman transport and pumping to the dynamics of coastal upwelling in the south-east pacific
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200025
work_keys_str_mv	AT croquettemarie onthecontributionsofekmantransportandpumpingtothedynamicsofcoastalupwellinginthesoutheastpacific AT eldingerard onthecontributionsofekmantransportandpumpingtothedynamicsofcoastalupwellinginthesoutheastpacific AT echevinvincent onthecontributionsofekmantransportandpumpingtothedynamicsofcoastalupwellinginthesoutheastpacific
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ON THE CONTRIBUTIONS OF EKMAN TRANSPORT AND PUMPING TO THE DYNAMICS OF COASTAL UPWELLING IN THE SOUTH-EAST PACIFIC

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