Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/47644
Título: The transition zone of the Canary Current upwelling region
Autores/as: Barton, E. D.
Aristegui, J. 
Tett, P.
Canton, M.
García-Braun, J.
Hernández-León, S. 
Nykjaer, L.
Almeida, C. 
Almunia Portolés, Javier 
Ballesteros, S.
Basterretxea, G.
Escanez, J.
García-Weil, L. 
Hernández-Guerra, A. 
López-Laatzen, F.
Molina, R.
Montero, M. F. 
Navarro-Peréz, E.
Rodríguez, J. M.
Van Lenning, K.
Vélez, H.
Wild, K.
Clasificación UNESCO: 2510 Oceanografía
Palabras clave: Northern California
Cold Filaments
Satellite-Observations
Biological Structure
Northwest Africa, et al.
Fecha de publicación: 1998
Editor/a: 0079-6611
Proyectos: CANIGO
FRENTES (AMB 95-0731), CICYT
Publicación seriada: Progress in Oceanography 
Resumen: Like all the major upwelling regions, the Canary Current is characterised by intense mesoscale structure in the transition zone between the cool, nutrient-rich waters of the coastal upwelling regime and the warmer, oligotrophic waters of the open ocean. The Canary Island archipelago, which straddles the transition, introduces a second source of Variability by per turbing the general southwestward flow of both ocean currents and Trade winds. The combined effects of the flow disturbance and the eddying and meandering of the boundary between upwelled and oceanic waters produce a complex pattern of regional variability. On the basis of historical data and a series of interdisciplinary field studies, the principal features of the region are described. These include a prominent upwelling filament originating near 28 degrees N off the African coast, cyclonic and anti-cyclonic eddies downstream of the archipelago, and warm wake regions protected from the Trade winds by the high Volcanic peaks of the islands. The filament is shown to be a recurrent feature, apparently arising from the interaction of a topographically trapped cyclonic eddy with the outer edge of the coastal upwelling zone. Its role in the transport and exchange of biogenic material, including fish larvae, is considered. Strong cyclonic eddies, observed throughout the year, drift slowly southwestward from Gran Canaria. One sampled in late summer was characterised by large vertical isopycnal displacements, apparent surface divergence and strong upwelling, producing a fourfold increase in chlorophyll concentrations over background values. Such intense eddies can be responsible for a major contribution to the vertical flux of nitrogen. The lee region of Gran Canaria is shown to be a location of strong pycnocline deformation resulting from Ekman pumping on the wind shear boundaries, which may contribute to the eddy formation process. (C) 1998 Elsevier Science Ltd. All rights reserved.
URI: http://hdl.handle.net/10553/47644
ISSN: 0079-6611
DOI: 10.1016/S0079-6611(98)00023-8
Fuente: Progress in Oceanography [ISSN 0079-6611], v. 41, p. 455-504
Colección:Artículos
Vista completa

Citas SCOPUSTM   

371
actualizado el 15-dic-2024

Citas de WEB OF SCIENCETM
Citations

366
actualizado el 15-dic-2024

Visitas

213
actualizado el 01-nov-2024

Google ScholarTM

Verifica

Altmetric


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.