Eddies and thermohaline intrusions of the shelf/slope front off the northeast Spanish coast

Tintoré, Joaquín; Wang, Dongping; Violette, Paul E. La

doi:10.1029/jc095ic02p01627

Cited by 71 publications

(36 citation statements)

References 6 publications

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“…Tintoré et al, 1990). The CIW found at surface in the present study is located where geostrophic current peaks (Fig.…”

Section: Discussionmentioning

confidence: 92%

“…At the same time, fresh-water input increases, not only because of high rainfall but also because of high flow rates in the Rhône River due to the spring thaw in the mountains. For these reasons, areas of low surface salinity water (below 37.5) are commonly found off the Catalan coast at the end of spring (Tintoré et al, 1990). Occasionally, these waters may even be much less saline than usual (below 35) as reported by Castellón et al, (1985).…”

Section: Introductionmentioning

confidence: 84%

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Advection of continental water as an export mechanism for anchovy, Engraulis encrasicolus, larvae

Sabatés¹,

Salat²,

Olivar³

2001

Sci. Mar.

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SUMMARY: The presence of a surface layer of a less saline water of continental influence (CIW) along the continental slope off the Catalan coast (NW Mediterranean) was observed in June 1995. This CIW was formed in the Gulf of Lions from Rhône runoff and carried by the current associated with the shelf-slope front. This study analyses the spatio-temporal behaviour of that water of continental influence in relation to the shelf-slope front, and its effect on the distribution of fish larvae, in particular the larvae of the anchovy, Engraulis encrasicolus. Displacements of the front are observed to follow an oscillation with a period of eight days and an amplitude of 10 km. Anchovy larvae were associated with the presence of CIW, whereas the oceanic species Hygophum benoiti appeared in the region of the slope when the front, and the associated CIW layer, moved close inshore during its oscillation. The size frequency distribution for the anchovy larvae trapped within the CIW suggests that the larvae had been spawned further north, near the Gulf of Lions. It is concluded not only that larvae were transported by the current but also that their development had taken place entirely inside the CIW. The possible benefit to the survival of anchovy larvae of being kept inside that water, though they have been carried far from their spawning areas, is discussed in the basis of fluorescence and microzooplankton data.

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“…Tintoré et al, 1990). The CIW found at surface in the present study is located where geostrophic current peaks (Fig.…”

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 84%

Advection of continental water as an export mechanism for anchovy, Engraulis encrasicolus, larvae

Sabatés¹,

Salat²,

Olivar³

2001

Sci. Mar.

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“…Since the spawning period was mainly limited to 2 mo, this means that spawning intensity was commensurately higher. In the northern part of the region, anchovy seemed to spawn at the time of year when water temperature was high and the outflow from the Rh6ne River was still substantial (Tintor6 et al 1990), creating, in terms of stabihty and productivity, an environment favourable to spawning. Richardson (1981) reported similar spawning behaviour for the northern subpopulation of Engraulis mordax (40 to 50' N), which spawns during June and July, while the central subpopulation (30 to 40' N) spawns practically all year long.…”

Section: Relationship Between Spawning and The Environmentmentioning

confidence: 99%

Spawning of anchovy Engraulis encrasicolus in the Northwestern Mediterranean relative to hydrographic features in the region

Palomera¹

1991

Mar. Ecol. Prog. Ser.

120

114

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The present study furnishes conclusive evidence for the existence of latitudinal differences m the duration of anchovy spawning related to temperature cycle and hydrographic features; 2 main spawmng areas were found, one off northern and another off southern Catalonia (NW Mediterranean, NE Spain). Total egg production was similar in the 2 spawning areas and even somewhat higher m the northern area, where the spawning cycle was shorter (ca 2 mo). The areas of highest egg abundance were located relatively far offshore, between 10 and 30 miles from the coast, spanning a very broad range of bottom depths, from 50 to 1000 m. The presence of a shelf-slope front of variable intensity running along the entire coast (Font et al. 1988) suggests that anchovy take advantage of the productivity associated with the front for reproductive purposes, particularly since the front is the most important enrichment phenomenon in the region during summer, the time of maximum spawning (Estrada & Margalef 1988). In addition, the distribution of spawning activity brings to light its association with the zones of influence of the outflows of 2 large rivers, the Rh6ne and the Ebro. On the whole, the reproductive behaviour of Engraulis encrasicolusm the Northwestern Mediterranean takes advantage of the most favourable conditions to ensure the success of early life stages in a region in which enrichment phenomena are more limited than those described for other clupeoid species

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“…SHE-CAT was nested into ESEOMED with the aim of improving the representation of the mesoscale processes in the shelf-slope region. The dynamics in this area are dominated by a quasi-permanent slope current with strong variability (Millot 1999), and are affected by the presence of small eddies (Rubio et al 2009), waves (Jordi et al 2005) and filaments (Tintoré et al 1990). Over the shelf, water circulation is mainly affected by wind-and density-induced currents, while tides have little influence (Bolaños et al 2009).…”

Section: Mediterranean Areamentioning

confidence: 99%

Water circulation forecasting in Spanish harbours

Grifoll¹,

Jordà²,

Sotillo³

et al. 2012

Sci. Mar.

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SUMMARY: This paper describes the first harbour circulation forecasting system implemented in Spain. The configuration design was based on previous analyses of the morphologic and hydrodynamic behaviour of three harbours: Barcelona, Tarragona and Bilbao. A nested system of oceanic models was implemented, with a scope ranging from the regional scale (with a mean horizontal resolution of 5 km) to the harbour scale (with a mean horizontal resolution of 40 m). A set of sensitivity tests was carried out in order to determine the optimal configurations. The results of the operational system were compared with available observations, revealing that the intermediate models are able to reproduce the averaged hydrodynamic behaviour but not the spatio-temporal variability. With the harbour models the quality of the forecasts improves, reaching a correlation and RMSE of ~0.6 and 6 cm s -1 , respectively, for Bilbao harbour. In addition, numerical experiments were carried out to evaluate the sensitivity of the forecasts to error sources. The results suggest that the errors in the information prescribed in the lateral boundary conditions are the most influential in the quality of the predictions. Errors in the wind field also have a smaller but non-negligible influence. Although the system is in the initial implementation phase and should be improved upon in the future, it is now a useful tool for harbour management. The predictions will be very helpful for harbour operations, pollution risk management and fighting oil spills.Keywords: operational oceanography, harbour hydrodynamics, Barcelona harbour, Bilbao harbour, Tarragona harbour. RESUMEN: Predicción de la circulación marina en los Puertos esPañoles. -En este artículo se describe el primer sistema operacional de predicción de la circulación en puertos implementado en España. El diseño del sistema se ha basado en un análisis previo de las características hidrodinámicas y morfológicas de tres puertos de estudio: Barcelona, Tarragona y Bilbao. Se ha establecido un sistema de modelos oceánicos anidados que cubre desde la escala regional (con una resolución media horizontal de 5 km) al dominio portuario (con una resolución de 40 m). Diferentes experimentos de sensibilidad se han llevado a cabo para determinar las configuraciones óptimas. Los resultados del sistema operacional se han comparado con las observaciones disponibles, mostrando que los modelos intermedios son capaces de resolver el comportamiento hidrodinámico promedio, pero no la variabilidad espacio-temporal. En cuanto a los modelos portuarios, la calidad de las predicciones mejora, alcanzando una correlación y un RMSE de ~0.6 y 6 cm s -1 , respectivamente, para el puerto de Bilbao. Adicionalmente se han realizado diferentes experimentos para determinar la sensibilidad del sistema a distintas fuentes de error. Los resultados sugieren que los errores en las condiciones de contorno laterales son los más determinantes sobre la calidad de las predicciones portuarias. Los errores en el viento, aun siendo menos importan...

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Eddies and thermohaline intrusions of the shelf/slope front off the northeast Spanish coast

Cited by 71 publications

References 6 publications

Advection of continental water as an export mechanism for anchovy, Engraulis encrasicolus, larvae

Advection of continental water as an export mechanism for anchovy, Engraulis encrasicolus, larvae

Spawning of anchovy Engraulis encrasicolus in the Northwestern Mediterranean relative to hydrographic features in the region

Water circulation forecasting in Spanish harbours

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