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Exchange fluxes between the Ría de Vigo and the shelf: a bidirectional flow forced by remote wind


Gilcoto, M and Pardo, PC and Alvarez-Salgado, XA and Perez, FF, Exchange fluxes between the Ría de Vigo and the shelf: a bidirectional flow forced by remote wind, Journal of Geophysical Research: Oceans, 1123, (C6) Article C06001. ISSN 2169-9275 (2007) [Refereed Article]


Copyright Statement

Copyright 2007 American Geophysical Union

DOI: doi:10.1029/2005JC003140


[1] In the Rķa de Vigo (western coast of the Iberian Peninsula) the seasonal pattern associated with shelf winds at these latitudes produces upwelling/downwelling episodes that affect the residual circulation. The aim of this paper is to go deeply into the interaction between remote winds and the dynamics of the ria aided by an inverse model. In the Galician r ias the box models (inverse models) have been developed from a two-dimensional (2-D) point of view since the classical baroclinic residual circulation in positive estuaries has a vertical distribution (freshwater outflow through the surface layer and inflow through the bottom layer). However, recent work in the Rķa de Vigo has shown the existence of a 3-D residual circulation in the seaward region of the ria. During upwelling (downwelling) conditions a coastal jet enters (leaves) the ria through the northern mouth and leaves (enters) through the southern mouth. The inverse model developed in this paper is a 3-D kinematic box model based on tracer and volume balances with the constraint of nonnegative vertical exchange coefficients. The fluxes obtained confirm, during some periods, the 3-D residual circulation overlying the classical 2-D scheme. It is shown how the 3-D pattern affects the inner ria, causing transversal differences in the flow field. In addition, the model results have been helpful in the discussion of a possible barotropic bidirectional flow associated with remote winds. The results have set the basis for the existence of a bidirectional flow originated by a barotropic interaction with the shelf upwelling.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Oceanography not elsewhere classified
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Measurement and assessment of estuarine water quality
UTAS Author:Pardo, PC (Dr Paula Conde Pardo)
ID Code:103069
Year Published:2007
Web of Science® Times Cited:25
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2015-09-17
Last Modified:2015-10-08
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