Wind and tide current prediction using a 3D finite difference model in the Ría de Vigo (NW Spain)

Souto, C.; Fariña-Busto, E.; Alvarez, Luis G.; Rodríguez, I.

doi:10.3989/scimar.2001.65s1269

Cited by 16 publications

(12 citation statements)

References 6 publications

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“…First, the wind can explain most of the current's variability found in the northern mouth, and even some diurnal peaks are the result of wind forcing, thus showing that current's response to wind forcing is very quick, with a lag of only a few hours between the beginning of the forcing and the resulting currents. Second, the wind currents can overcome tidal currents, as can be seen from experimental data and as was also found with wind‐ and tide‐driven simulations [ Souto et al , 2001]. Third, all the water column at the northern mouth moves basically in the same direction, without the formation of a two‐layer structure.…”

Section: Hamsom Resultsmentioning

confidence: 56%

“…Thus the river inflow was set to zero (the barotropic river effect is neglected), steadiness and uniformity were assumed for the thermohaline fields and evaporation, precipitation and air sea heat exchange were not allowed. In this way it will be shown that the remote wind is usually the most important forcing agent in the Ría de Vigo [ Rosón et al , 1997; Álvarez‐Salgado et al , 2000; Souto , 2000; Souto et al , 2001], extending its influence even at high (tidal) frequencies. The wind stress forcing at the sea surface was calculated through using data from the meteorological station of the INM at Cape Fisterra.…”

Section: Hamsom Resultsmentioning

confidence: 99%

“…Moreover, since there were no significant differences in the estimation of currents among only wind forced HAMSOM results (section 3.1) and baroclinic HAMSOM results (section 3.2), one may conclude that wind forcing must be always included in simulations with the purpose of obtaining reliable and realistic results with a numerical model. This has been considered by some authors [ Souto , 2000; Souto et al , 2001; Torres López et al , 2001] but not by others [ Taboada et al , 1998; Gómez‐Gesteira et al , 1999]. Obviously, this does not mean that the nonlinear tidal processes, river flood events, stratification processes, etc.…”

Section: Discussionmentioning

confidence: 98%

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Modeling the residual circulation of a coastal embayment affected by wind‐driven upwelling: Circulation of the Ría de Vigo (NW Spain)

et al. 2003

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[1] The barotropic and baroclinic nontidal circulations of the Ría de Vigo (NW Spain) are studied using the three-dimensional finite difference model HAMSOM (Hamburg Shelf Ocean Model). The external forcing acting on the system includes winds, freshwater inflow in the inner part of the ria and all over its surface, and heat exchange with the atmosphere. Modeled velocity is compared with data from an AANDERAA DCM12 acoustic Doppler current meter at one site of the ria, and predicted salinity and temperature fields contrasted with SEABIRD conductivity-temperature-depth data along the main channel of the ria. All predicted current, salinity, and temperature fields are in good agreement with experimental data. A new residual circulation pattern of the Ría de Vigo and its dependence on coastal winds is described. According to this pattern the typical estuarine two-layer circulation overlays in the outer part of the ria with a lateral circulation, resulting in a three-dimensional dynamics. The lateral circulation is induced by interaction between the southward (northward) alongshore coastal jet associated with upwelling (downwelling) winds and the topographic configuration of the ria.

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Section: Hamsom Resultsmentioning

confidence: 56%

Section: Hamsom Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 98%

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Modeling the residual circulation of a coastal embayment affected by wind‐driven upwelling: Circulation of the Ría de Vigo (NW Spain)

et al. 2003

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“…Despite the dominance of the external wind forcing, the penetration of southwesterlies into the middle ria, as seen here and suggested by Souto et al . [], implies that local wind may also play a significant role in extending the inverse circulation inside the ria through direct drag [ Bowden , ; Csanady , ], wave‐current interactions [ Signell et al ., ] and modulation of the straining of the density field [ Scully et al ., ; Chen and Sanford , ; Li and Li , ]. For instance, Torres López et al .…”

Section: Discussionmentioning

confidence: 99%

Surface water subduction during a downwelling event in a semienclosed bay

et al. 2016

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The Ría de Vigo is a bay strongly influenced by upwelling‐downwelling cycles along the adjacent coast of NW Iberia. Moored and ship‐board observations during September 2006 showed that subduction, initially associated with an estuarine circulation, strengthened when a strong downwelling circulation, resulting from northward wind over the coastal ocean, was generated in the outer Ría causing ambient waters to be advected outward in the lower layer. Incoming surface waters confined the estuarine circulation to the shallow interior and displaced isopleths downward through the water column at ∼10 m d−1. As the estuarine circulation retreated inward, strong flow convergence developed between middle and inner ria in the layer above 15 m, while divergence developed beneath. The convergence increased through the period of downwelling‐favorable wind at a rate consistent with the observed isopleth displacement velocities. The coefficient of turbulent diffusion Kt, from a microstructure profiler, indicated that mixing was strong in the estuarine circulation and subsequently in the downwelling zone, where localized instabilities and temperature‐salinity inversions were observed. During the downwelling, concentrations of phytoplankton, including potentially harmful species, increased, especially in the middle and inner ria, as a result of inward advection, subduction, and the ability of the dinoflagellates to maintain their position in the water column by swimming. In the course of the 5 day event, the water mass of all but the innermost Ría was flushed completely and replaced by waters originating in the coastally trapped poleward flow along the Atlantic coastline.

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“…A new tool has been recently introduced for the study of the remote wind‐induced circulation of the rías: Torres‐López et al [2001] and Souto et al [2001, 2003] applied the GHER (GeoHydrodynamics and Environment Research) and HANSOM (HAmburg Shelf Ocean Model) numerical models, respectively. They compared simulated with experimental data to conclude that the typical estuarine two‐layered circulation pattern of the inner and middle Ría de Vigo overlaps with the alongshore circulation of the ría, which results from the interaction of shelf winds and the intricate topography of the coast.…”

Section: Introductionmentioning

confidence: 99%

Short‐timescale thermohaline variability and residual circulation in the central segment of the coastal upwelling system of the Ría de Vigo (northwest Spain) during four contrasting periods

et al. 2005

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[1] Sixteen hydrographic surveys were carried out in the middle segment of the Ría de Vigo (northwest Spain) at 3-to 4-day intervals during February, April, July, and September 2002 (four surveys per period). Simultaneously, an acoustic Doppler current profiler (ADCP) mooring recorded the velocity profile. Combination of direct current measurements with the output of an inverse model based on the time course of the distributions of salinity and temperature allowed an objective analysis of the effect of the meteorological forces on the hydrodynamics of the Ría. Remote shelf winds explained more than 65% of the variability of the subtidal circulation, which responded immediately to this forcing (lag time, <2 days). Shelf winds created a simple two-layered circulation pattern, with a surface outgoing current under northerly winds and a surface ingoing current under southerly winds. A three-layered circulation developed during the transitions from northerly to southerly winds and vice versa. At the same time, an empirical orthogonal function (EOF) analysis demonstrated the lack of contribution of local winds to the subtidal dynamics of the ría. Continental runoff and heat exchange with the atmosphere explained less than 5% and 25% of the variability observed in the subtidal circulation of the Ría de Vigo.Citation: Piedracoba, S., X. A. Á lvarez-Salgado, G. Rosón, and J. L. Herrera (2005), Short-timescale thermohaline variability and residual circulation in the central segment of the coastal upwelling system of the Ría de Vigo (northwest Spain) during four contrasting periods,

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Wind and tide current prediction using a 3D finite difference model in the Ría de Vigo (NW Spain)

Cited by 16 publications

References 6 publications

Modeling the residual circulation of a coastal embayment affected by wind‐driven upwelling: Circulation of the Ría de Vigo (NW Spain)

Modeling the residual circulation of a coastal embayment affected by wind‐driven upwelling: Circulation of the Ría de Vigo (NW Spain)

Surface water subduction during a downwelling event in a semienclosed bay

Short‐timescale thermohaline variability and residual circulation in the central segment of the coastal upwelling system of the Ría de Vigo (northwest Spain) during four contrasting periods

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