A shelf/slope frontal filament off the northeast Spanish Coast

Wang, Dong Ping; Vieira, Mário E. C.; Salat, Jordi; Tintoré, Joaquín; Violette, Paul E. La

doi:10.1357/002224088785113586

Cited by 80 publications

(32 citation statements)

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“…Therefore, upwelling areas do not display a striking difference in biological production as compared to other active areas of the basin. By contrast, in situ observations and modeling studies suggest that mesoscale and submesoscale processes may affect biological activity in the MS, namely in: i) active frontal regions (North BalearicCatalan, Almeria-Oran, North-East Aegean Sea Fronts) (e.g., Estrada and Salat, 1989;Estrada, 1991;Zervoudaki et al, 2007), ii) deep convection areas (Gulf of Lion, South Adriatic Gyre, Rhodos Gyre) (e.g., Lévy et al, 1998a,b;SiokouFrangou et al, 1999;Gacic et al, 2002), and iii) sites where coastal morphology and intense wind stress generate a strong input of potential vorticity that leads to the formation of energetic filaments (Wang et al, 1988;Bignami et al, 2008). The latter process may significantly contribute to the dispersal of coastal inputs toward the open sea, along with plankton.…”

Section: Physical and Chemical Frameworkmentioning

confidence: 99%

Plankton in the open Mediterranean Sea: a review

et al. 2010

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Abstract. We present an overview of the plankton studies conducted during the last 25 years in the epipelagic offshore waters of the Mediterranean Sea. This quasi-enclosed sea is characterized by a rich and complex physical dynamics with distinctive traits, especially in regard to the thermohaline circulation. Recent investigations have basically confirmed the long-recognised oligotrophic nature of this sea, which increases along both the west-east and the north-south directions. Nutrient availability is low, especially for phosphorous (N:P up to 60), though this limitation may be buffered by inputs from highly populated coasts and from the atmosphere. Phytoplankton biomass, as chl a, generally displays low values (less than 0.2 µg chl a l −1 ) over large areas, with a modest late winter increase. A large bloom (up to 3 µg l −1 ) is observed throughout the late winter and spring exclusively in the NW area. Relatively high biomass values are recorded in fronts and cyclonic gyres. A deep chlorophyll maximum is a permanent feature for the whole basin, except during the late winter mixing. It is found at increasingly greater depths ranging from 30 m in the Alboran Sea to 120 m in the easternmost Levantine basin. Primary production reveals a west-east decreasing trend and ranges between 59 and 150 g C m −2 y −1 (in situ measurements). Overall, the basin is largely dominated by small autotrophs, microheterotrophs and egg-carrying copepod species. The microorganisms (phytoplankton, viruses, bacteria, flagellates and ciliates) and zooplankton components reveal a considerable diversity and

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Section: Physical and Chemical Frameworkmentioning

confidence: 99%

Plankton in the open Mediterranean Sea: a review

et al. 2010

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“…The higher influx of continental run-off contributes to an increase in the mesoscale activity at the shelfslope front typical of the spring season (Albérola et al, 1995;Font et al, 1995). In particular CIW were also found in filaments that move cross-wise to the general circulation pattern, flowing ageostrophically (Wang et al, 1988). Instabilities in the density front also give rise to fluctuations in the location and strength of the front (Alvarez et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

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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“…2, Wang et al 1988). In 1987 a second cruise was undertaken slightly north of the FE86 area but still in the shelf/slope region close to the northwestern Spanish coast.…”

Section: Mesoscale Dynamics and Western Mediterranean Circulationmentioning

confidence: 99%

“…Characteristic integral scales and diffusivities were determined and the location of those regions with enhanced mesoscale variability (where eddy kinetic energy exceeds the mean kinetic energy) was found to be associated with places where instabili- cruises in front of the Ebro River (northwestern Mediterranean Basin). Centre: trajectories of VHF radio-tracked drifters inside a low-salinity filament in the northwestern Mediterranean region (reproduced with permission from Wang et al 1988). Right: observations of inertial oscillations depicted by drifters deployed during the FE-87 cruise (reproduced with permission from Salat et al 1992).…”

Section: Mesoscale Dynamics and Western Mediterranean Circulationmentioning

confidence: 99%

Thirty years of research and development of Lagrangian buoys at the Institute of Marine Sciences

Garcı́a-Ladona¹,

Salvador²,

Fernández³

et al. 2016

Sci. Mar.

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Summary:Since the mid-1980s, physical oceanographers at the Institute of Marine Sciences have been involved in the use of Lagrangian drifters as a complementary technology for their oceanographic research. As Lagrangian observations became more feasible, these researchers continued developing their own drifters in what was to be the seed of current technological activities at the Physical and Technological Oceanography Department. In this paper we overview the work done during the last 30 years with special focus on Lagrangian developments from the initial activities to the latest developments. In addition to basic oceanography research applications, Lagrangian technological developments include prototypes for measuring surface and subsurface ocean properties, for tracking purposes in search and rescue operations and pollution events, and for monitoring ice motion and thickness in the Arctic. The paper emphasizes original and unpublished technical aspects related to the latest developments.Keywords: Lagrangian drifters; sea surface measurements; salinity measurements; oil spills drifters; SMOS. Treinta años de investigación y desarrollo de boyas Lagrangianas en el Instituto de Ciencias del MarResumen: Desde mediados de la década de los 80, los oceanógrafos físicos en el Instituto de Ciencias del Mar se involucraron en el uso de boyas Lagrangianas como una tecnología complementaria para su investigación oceanográfica. A medida que las observaciones Lagrangianas se volvieron más factibles, los investigadores continuaron desarrollando sus propios flotadores en lo que se convirtió en la semilla de las actuales actividades tecnológicas llevadas a cabo en el Departamento de Oceanografía Física y Tecnológica. En este artículo se presenta una visión general del trabajo realizado durante los últimos 30 años, con especial énfasis en el uso de flotadores a la deriva y desarrollos propios desde su inicio hasta las aplicaciones más recientes. Además de estudios básicos de investigación oceanográfica, los desarrollos tecnológicos llevados a cabo incluyen prototipos para medir las propiedades superficiales y sub-superficiales, para tareas de seguimiento en operaciones de búsqueda y rescate y eventos de contaminación marina o para monitorizar el grosor de la capa de hielo y su movimiento en el Ártico. En este trabajo se hace hincapié en aspectos técnicos originales e inéditos relacionados con los últimos desarrollos.Palabras clave: flotadores Lagrangianos; medidas de la superficie del océano; medidas de salinidad; flotadores de vertidos de petróleo; SMOS.Citation/Como citar este artículo:

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A shelf/slope frontal filament off the northeast Spanish Coast

Cited by 80 publications

References 0 publications

Plankton in the open Mediterranean Sea: a review

Plankton in the open Mediterranean Sea: a review

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

Thirty years of research and development of Lagrangian buoys at the Institute of Marine Sciences

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