Numerical modelling of the M2 tide on the northern Patagonian Shelf

Glorioso, Pablo D.; Simpson, John H.

doi:10.1016/0278-4343(94)90016-7

Cited by 40 publications

(47 citation statements)

References 6 publications

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“…The influences of tidal currents and mixing, as indicated by barotropic current measurements derived from ADCP data and by outputs from a barotropic model (Tonini et al, 2007), increased from the south to the north and were lower in stratified relative to unstratified stations in the study region. Kinetic energy dissipation rates over most of the region were on the order of 0.1 W m -2 but were highly concentrated northeast of Península Valdés, where maximum values exceed 5 W m -2 because of the coastline configuration (Glorioso & Simpson, 1994). Barotropic current patterns broadly corresponded inversely with the general north-south distribution patterns of M. leidyi, suggesting that increased tidal mixing does not favour accumulation of ctenophore biomass.…”

Section: Horizontal Biomass Patternsmentioning

confidence: 93%

“…Salinity, ranging from 33.5 to 33.65, does not generally cause vertical or horizontal stratification in the region. The position of the front is predictable (Glorioso & Simpson, 1994;Sánchez et al, 1998) and generally aligned in a NE-SW orientation that closely follows bathymetric contours. The front is located offshore in the northern area, on average 80 km from the coastline, and approaches the shore in the south to within 50 km from the coast (Sabatini & Martos, 2002).…”

Section: Introductionmentioning

confidence: 90%

“…The front is located offshore in the northern area, on average 80 km from the coastline, and approaches the shore in the south to within 50 km from the coast (Sabatini & Martos, 2002). Turbulent dissipation rates in the water column generally decrease from north to south (Glorioso & Simpson, 1994;Glorioso & Flather, 1995;Glorioso, 2000), which may be influenced by the position of the 75-80 m isobath over the middle shelf in the north to near the coastline (Sabatini & Martos, 2002) in the south. Water column energy dissipation is highly concentrated near the northeast of Península Valdés (Glorioso & Simpson, 1994).…”

Section: Introductionmentioning

confidence: 98%

“…Turbulent dissipation rates in the water column generally decrease from north to south (Glorioso & Simpson, 1994;Glorioso & Flather, 1995;Glorioso, 2000), which may be influenced by the position of the 75-80 m isobath over the middle shelf in the north to near the coastline (Sabatini & Martos, 2002) in the south. Water column energy dissipation is highly concentrated near the northeast of Península Valdés (Glorioso & Simpson, 1994). Topographic shoals located southeast and northeast of Península Valdés also intensify tidal mixing (Glorioso, 1987).…”

Section: Introductionmentioning

confidence: 98%

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Avoidance of hydrodynamically mixed environments by Mnemiopsis leidyi (Ctenophora: Lobata) in open-sea populations from Patagonia, Argentina

et al. 2010

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Biomass distributions of the ctenophore, Mnemiopsis leidyi, were collected during a weeklong survey program in a tidal front along the Patagonian shelf in December 1989. Average ctenophore biomass concentrations varied significantly along a north-south gradient and in stratified compared to unstratified waters. The relative vertical distribution of M. leidyi biomass appeared to be constrained by surface levels of vertical shear. Vertical distributions of ctenophore biomass were highly variable at low levels of vertical shear (\4 s -1 ) at the surface, but at higher levels of surface vertical shear ctenophores occurred deeper in the water column where shear levels were lower. These results indicate that physical conditions are important factors influencing the distribution of M. leidyi along the Patagonian shelf during summer months.

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Section: Horizontal Biomass Patternsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

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Avoidance of hydrodynamically mixed environments by Mnemiopsis leidyi (Ctenophora: Lobata) in open-sea populations from Patagonia, Argentina

et al. 2010

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“…Dichos registros son dominados por fluctuaciones de alta frecuencia, inerciales y de marea, por lo tanto resultan inadecuados para revelar los patrones espaciales de la circulación general. Por este motivo, la circulación media en la zona de los golfos norpatagónicos y sus conexiones con el mar adyacente ha sido generalmente inferida a partir de la distribución de propiedades físicas y químicas, indicadores biológicos (Carreto et al, 1974;Glorioso, 1987;Rivas & Beier, 1990) y modelos físico-matemáticos simplificados (Rivas, 1989;Akaprahamyan, 1991;Glorioso & Simpson, 1994;Mazio et al, 2004).…”

Section: Introductionunclassified

Respuesta barotropica de los golfos norpatagonicos argentinos forzados por mareas y vientos

Tonini

Palma

2011

lajar

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RESUMEN.En este trabajo se presentan los resultados de un modelo hidrodinámico barotrópico de alta resolución no-lineal tridimensional para examinar la respuesta de los golfos norpatagónicos argentinos, San Matías (GSM), Nuevo (GN) y San José (GSJ), ante forzante de marea y patrones idealizados de viento superficial. La estructura de la circulación inducida por el viento predominante (Oeste) en los tres golfos consiste en dos giros independientes: uno anticiclónico en el Oeste con una corriente costera más intensa que fluye hacia el sur y un retorno más débil por el centro de los golfos y otro giro ciclónico en el Este, que establece la conexión con la Plataforma en el caso del GSM. El GN y GSJ tienen la comunicación con el exterior muy restringida. La inclusión de efectos disipativos producidos por la marea reduce la intensidad de los giros, pero la estructura espacial de la circulación permanece. Si se incrementa la magnitud del viento se intensifican principalmente los giros anticiclónicos y el transporte de intercambio en la boca del GSM y se profundiza la capa superficial de Ekman. En los experimentos forzados con vientos meridionales la circulación media se divide en dos giros cuyo sentido de circulación depende de la dirección del viento: un giro Norte ciclónico (anticiclónico) y un giro Sur anticiclónico (ciclónico) para vientos del Sur (Norte). Cuando los golfos son forzados simultáneamente por marea y vientos, las corrientes residuales de marea dominan la circulación media y contribuyen a un mayor aislamiento dinámico de los mismos con la plataforma exterior. Palabras clave: simulación numérica, circulación oceánica, modelo barotrópico, forzante de viento, giros de circulación, golfos norpatagónicos, Argentina. Barotropic response of north Patagonian gulfs in Argentina to tidal and wind forcingABSTRACT. This work presents the results of a high resolution three dimensional non-linear barotropic hydrodynamic model used to examine the response of three north Patagonian gulfs in Argentina (San Matías, SMG; Nuevo, NG; and San José, SJG) forced by tides and idealized patterns of surface winds. The structure of the circulation induced by the dominant winds (Westerly) in all three gulfs consists of two independent gyres: one anticyclonic gyre in the west with an intense southward coastal flow and weaker return flow in the middle of the gulfs and one cyclonic gyre in the east that, in the SMG's case, connects with the shelf. The other two gulfs (NG and SJG) have much more restricted connections with the exterior. The inclusion of tidal dissipation effects reduces the intensity of the gyres, but the general spatial pattern of the circulation remains. Increasing the wind magnitude mainly intensifies the anticyclonic gyre and the cross-shelf transport through the SMG mouth and deepens the surface Ekman layer. If the gulfs are forced with meridional winds, the circulation splits into two gyres whose sense of circulation depends on the wind direction: a northern cyclonic (anticyclonic) gyre and a southern anticyclon...

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Modelling the South West Atlantic

Glorioso

2002

Aquatic Conservation

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ABSTRACT1. This brief review paper of modelling developments in the SW Atlantic, presents material generated by a barotropic model of the whole continental shelf and shelf edge, which constitute a distinct biogeochemical province defined by its fundamental oceanographic processes and their implications to the regional wildlife.2. The basic circulation components solved by the model include the Patagonian shelf tidal regime, the Falkland-Malvinas Current and wind-driven currents and surges.3. Output from the model has already been used as the hydrodynamic base of an oil spill model, which was part of the Falkland Islands contingency plans in the North Falkland Basin during a recent oil exploration campaign. As part of the continuing evolution of the model, ongoing developments aiming at simulating observed baroclinic processes by assimilating measurements are outlined.

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Numerical modelling of the M2 tide on the northern Patagonian Shelf

Cited by 40 publications

References 6 publications

Avoidance of hydrodynamically mixed environments by Mnemiopsis leidyi (Ctenophora: Lobata) in open-sea populations from Patagonia, Argentina

Avoidance of hydrodynamically mixed environments by Mnemiopsis leidyi (Ctenophora: Lobata) in open-sea populations from Patagonia, Argentina

Respuesta barotropica de los golfos norpatagonicos argentinos forzados por mareas y vientos

Modelling the South West Atlantic

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