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Kinematic studies of transport across an island wake, with application to the Canary islands

Autor Sandulescu, Mathias; Hernández-García, Emilio ; López, Cristóbal ; Feudel, Ulrike
Palabras clave Chaotic Dynamics
Atmospheric and Oceanic Physics
Fluid Dynamics
Canary Islands
Fecha de publicación 1-oct-2006
EditorBlackwell Publishing
Citación Tellus A 58, 605-615 (2006)
ResumenTransport from nutrient-rich coastal upwellings is a key factor influencing biological activity in surrounding waters and even in the open ocean. The rich upwelling in the North-Western African coast is known to interact strongly with the wake of the Canary islands, giving rise to filaments and other mesoscale structures of increased productivity. Motivated by this scenario, we introduce a simplified two-dimensional kinematic flow describing the wake of an island in a stream, and study the conditions under which there is a net transport of substances across the wake. For small vorticity values in the wake, it acts as a barrier, but there is a transition when increasing vorticity so that for values appropriate to the Canary area, it entrains fluid and enhances cross-wake transport.
Descripción ArXiv pre-print: http://arxiv.org/abs/nlin/0605051.-- Final full-text version of the paper available at: http://dx.doi.org/10.1111/j.1600-0870.2006.00199.x.
URI http://hdl.handle.net/10261/6093
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