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dc.contributor.authorÁlvarez-Salgado, X.A. (Xosé Antón)
dc.contributor.authorGago, J. (Jesús) 
dc.contributor.authorMíguez, B.M. (Beatriz)
dc.contributor.authorGilcoto, M. (Miguel)
dc.contributor.authorFernández-Pérez, F. (Fiz)
dc.date.accessioned2014-03-06T11:49:11Z
dc.date.available2014-03-06T11:49:11Z
dc.date.issued2000-12
dc.identifier.otherdoi: 10.1006/ecss.2000.0714
dc.identifier.urihttp://hdl.handle.net/10508/1683
dc.description.abstractA set of hydrographic surveys were carried out in the Ría of Vigo (NW Spain) at 2–4 d intervals during four 2–3 week periods in 1997, covering contrasting seasons. Residual exchange fluxes with the adjacent shelf were estimated with a 2-D, non-steady-state, salinity–temperature weighted box model. Exchange fluxes consist of a steady-state term (dependent on the variability of continental runoff) and a non-steady-state term (dependent on the time changes of density gradients in the embayment). More than 95% of the short-time-scale variability of the exchange fluxes in the middle and outer ría can be explained by the non-steady-state term that, in turns, is correlated (R2>75%) with the offshore Ekman transport. Conversely, 96% of the variability of exchange fluxes in the inner ría rely on the steady-state term. The outer and middle ría are under the direct influence of coastal upwelling, which enhances the positive residual circulation pattern by an order of magnitude: from 10 2 to 10 3 m3s−1. On the contrary, downwelling provokes a reversal of the circulation in the outer ría. The position of the downwelling front along the embayment depends on the relative importance of Ekman transport (Qx, m3s−1km−1) and continental runoff (R, m3s−1). When Qx/ R>7±2 the reversal of the circulation affects the middle ría. Our results are representative for the ‘Rías Baixas’, four large coastal indentations in NW Spain. During the upwelling season (spring and summer), 60% of shelf surface waters off the ‘Rías Baixas’ consist of fresh Eastern North Atlantic Central Water (ENACW) upwelled in situ. The remaining 40% consists of upwelled ENACW that previously enters the rías and it is subsequently outwelled after thermohaline modification. During the downwelling season (autumn and winter), 40% of the warm and salty oceanic subtropic surface water, which piled on the shelf by the predominant southerly winds, enters the rias.es_ES
dc.language.isoenges_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectupwellinges_ES
dc.subjectdownwellinges_ES
dc.subjectoutwellinges_ES
dc.subjectbox modeles_ES
dc.subjectSpanish Riases_ES
dc.titleSurface waters of the NW Iberian margin: upwelling on the shelf versus outwelling of upwelled waters from the Rías Baixases_ES
dc.typearticlees_ES
dc.identifier.bibliographicCitationÁlvarez-Salgado, X.A., J. Gago, B.M. Míguez, M. Gilcoto, F.F. Pérez. 2000. Surface waters of the NW Iberian margin: upwelling on the shelf versus outwelling of upwelled waters from the Rías Baixas. Estuarine, Coastal and Shelf Science 51 (6): 821-837es_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1006/ecss.2000.0714es_ES
dc.publisher.centreCentro Oceanográfico de Vigoes_ES
dc.rights.accessRightsopenAccesses_ES
dc.coverage.spatialStudyAtlantic Oceanen_US
dc.coverage.spatialStudyCentral Atlanticen_US
dc.coverage.spatialStudyEastern Central Atlanticen_US
dc.coverage.spatialStudyNorthwest Spanishen_US
dc.coverage.spatialStudyLower Riasen_US


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