Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/51658
Title: Variability in the Canary Islands area of filament-eddy exchanges
Authors: Barton, Eric D.
Aristegui, J 
Tett, Paul
Navarro-Pérez, Eleuteria
UNESCO Clasification: 251001 Oceanografía biológica
Keywords: Upwelling
Eddies
Mixing
Islands
Jets, et al
Issue Date: 2004
Publisher: 0079-6611
Journal: Progress in Oceanography 
Abstract: The physical background to a suite of biological studies carried out in the Canary Islands upwelling region is presented. The area is unique in that the coastal transition zone is spanned by an archipelago of islands that shed mesoscale eddies of diameter 50–100 km into the alongshore flow. A recurrent filament and eddy system was sampled intensively to study the changing properties of waters as they are advected towards the open ocean in the filament and to investigate the exchanges between filament and eddies. The system was more complex than previously revealed. In early August, a single filament extended offshore from near Cape Juby. Two weeks later, a second filament had developed slightly farther north and extended offshore to merge with the first at ∼100 km offshore. The merged filament was entrained around a recurrent, topographically trapped cyclonic eddy and interacted with transient cyclonic and anticyclonic eddies shed from the island of Gran Canaria. Between the two filaments and the coast, a pair of counter-rotating eddies re-circulated water parcels for several weeks. Surface layer drifters cycled around this near-shore re-circulation several times before following convoluted paths that demonstrate significant exchange between continental shelf and open ocean waters.
URI: http://hdl.handle.net/10553/51658
ISSN: 0079-6611
DOI: 10.1016/j.pocean.2004.07.003
Source: Progress In Oceanography [ISSN 0079-6611], v. 62 (2-4), p. 71-94
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