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Title: The Canary Eddy Corridor: a major pathway for long-lived eddies in the subtropical North Atlantic
Authors: Sangrà, Pablo
Pascual, Ananda
Rodríguez Santana, Ángel 
Machín Jiménez, Francisco José 
Mason, Evan
McWilliams, James C.
Pelegrí, Josep L.
Dong, Changming
Rubio, Anna
Arístegui Ruiz, Javier 
Marrero Díaz, María De Los Ángeles 
Hernández Guerra, Alonso 
Martínez Marrero, Antonio 
Auladell, Maricel
UNESCO Clasification: 251007 Oceanografía física
Keywords: Eddy corridor
Long-lived eddies
Eddies demography
Eddy tracking
Northeastern subtropical Atlantic
Issue Date: 2009
Project: Remolinos Oceanicos y de Posición Atmosferica (Roda): Dinámica y Monitorización de Remolinos Oceanicos en la Corriente de Canarias 
Remolinos Oceánicos y Deposición Atmosférica: Influencia Sobre Los Flujos de Particulas y Remineralización en la Columna de Agua (Roda). 
Journal: Deep-Sea Research Part I: Oceanographic Research Papers 
Abstract: We report, from remote sensing and in situ observations, a new type of permanent structure in the eastern subtropical Atlantic Ocean, that we call the “Canary Eddy Corridor”. The phenomenon, is a zonal long-lived (>3 months) mesoscale eddy corridor, whose source is the flow perturbation of the Canary Current and the Trade Winds at the Canary Islands. The latitudinal range of the corridor spans 22°N–29°N and extends from the Canaries to at least 32ºW, near the mid-Atlantic. This is the main region of long-lived westward-propagating eddies in the subtropical northeast Atlantic. From a age-distribution study we observe that at least 10% of mesoscale eddies in this region are long-lived, with a dominance of anticyclones over cyclones. Another four westward-propagating eddy corridors were also detected: two small corridors north and south of the Azores Front; a small zonal corridor located near 31ºN, south of the island of Madeira; and a small corridor located near the Cape Blanc giant filament. The existence of these corridors may change, at least for the northeastern subtropical Atlantic, the general idea that mesoscale eddies are disorganized, ubiquitous structures in the ocean. The Canary Eddy Corridor constitutes a direct zonal pathway that conveys water mass- and biogeochemical properties offshore from the Canary Island/Northwest Africa upwelling system, and may be seen as a recurrent offshore pump of organic matter and carbon to the oligotrophic ocean interior. Estimates of volume and mass transport indicate that Canary Eddy Corridor westward transport is more than one-fourth of the southward transport of the Canary Current. The westward transport of kinetic energy by the eddies of the Canary Corridor is as important as the southward transport by the Canary Current. The total primary production related to the Corridor may be as high as the total primary production of the northwest Africa upwelling system for the same latitude range.
ISSN: 0967-0637
DOI: 10.1016/j.dsr.2009.08.008
Source: Deep-Sea Research Part I: Oceanographic Research Papers [ISSN 0967-0637], v. 56 (12), p. 2100-2114
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