Upwelling mechanisms in the northewstern Alboran Sea

From April 1996 to July 1997, a series of hydrographic surveys were carried out in the Northwestern part of the Alboran Sea to investigate the upwelling that is an almost permanent feature in this area. Simultaneously a mooring line was deployed in the north part of the eastern section of the Strait...

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Autores: Viola, Tarek Sarhan, García-Lafuente, J.M., Vargas-Yáñez, Manuel, Vargas, J.M., Plaza-Jorge, Francisco
Tipo de recurso: artículo
Fecha de publicación:2000
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/319435
Acceso en línea:http://hdl.handle.net/10261/319435
Access Level:acceso abierto
Palabra clave:Medio Marino
Centro Oceanográfico de Gijón
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spelling Upwelling mechanisms in the northewstern Alboran SeaViola, Tarek SarhanGarcía-Lafuente, J.M.Vargas-Yáñez, ManuelVargas, J.M.Plaza-Jorge, FranciscoMedio MarinoCentro Oceanográfico de GijónFrom April 1996 to July 1997, a series of hydrographic surveys were carried out in the Northwestern part of the Alboran Sea to investigate the upwelling that is an almost permanent feature in this area. Simultaneously a mooring line was deployed in the north part of the eastern section of the Strait of Gibraltar to monitor the variability of the Atlantic Jet (AJ). Two mechanisms are shown to be relevant for the upwelling dynamic in the region: the southward drifting of the AJ and wind stress. A linear relation between the angle under which the Jet enters the Alboran Sea and the distance from the coastline to the front associated with the Jet has been found. This angle that has been estimated from the low passed time series of current velocity measured by the uppermost instrument of the moored line has been then used to identify the onshore–offshore excursions of the Jet. Both upwelling mechanisms are identified from hydrographic data, because each of them has associated a different type of water mass, and they take place in different locations. Wind-driven upwelling dominates in coastal zones, on the shelf, while upwelling associated with southward drifting of the AJ prevails further offshore. The amount of sub-surface water brought up to the surface by each one is of the same order. However, wind-driven upwelling contributes to the fertilization of this region in a major extent because water upwelled by wind is richer in nutrient concentration.SíConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232000info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/319435reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de GijónSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3194352026-05-22T06:33:51Z
dc.title.none.fl_str_mv Upwelling mechanisms in the northewstern Alboran Sea
title Upwelling mechanisms in the northewstern Alboran Sea
spellingShingle Upwelling mechanisms in the northewstern Alboran Sea
Viola, Tarek Sarhan
Medio Marino
Centro Oceanográfico de Gijón
title_short Upwelling mechanisms in the northewstern Alboran Sea
title_full Upwelling mechanisms in the northewstern Alboran Sea
title_fullStr Upwelling mechanisms in the northewstern Alboran Sea
title_full_unstemmed Upwelling mechanisms in the northewstern Alboran Sea
title_sort Upwelling mechanisms in the northewstern Alboran Sea
dc.creator.none.fl_str_mv Viola, Tarek Sarhan
García-Lafuente, J.M.
Vargas-Yáñez, Manuel
Vargas, J.M.
Plaza-Jorge, Francisco
author Viola, Tarek Sarhan
author_facet Viola, Tarek Sarhan
García-Lafuente, J.M.
Vargas-Yáñez, Manuel
Vargas, J.M.
Plaza-Jorge, Francisco
author_role author
author2 García-Lafuente, J.M.
Vargas-Yáñez, Manuel
Vargas, J.M.
Plaza-Jorge, Francisco
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Medio Marino
Centro Oceanográfico de Gijón
topic Medio Marino
Centro Oceanográfico de Gijón
description From April 1996 to July 1997, a series of hydrographic surveys were carried out in the Northwestern part of the Alboran Sea to investigate the upwelling that is an almost permanent feature in this area. Simultaneously a mooring line was deployed in the north part of the eastern section of the Strait of Gibraltar to monitor the variability of the Atlantic Jet (AJ). Two mechanisms are shown to be relevant for the upwelling dynamic in the region: the southward drifting of the AJ and wind stress. A linear relation between the angle under which the Jet enters the Alboran Sea and the distance from the coastline to the front associated with the Jet has been found. This angle that has been estimated from the low passed time series of current velocity measured by the uppermost instrument of the moored line has been then used to identify the onshore–offshore excursions of the Jet. Both upwelling mechanisms are identified from hydrographic data, because each of them has associated a different type of water mass, and they take place in different locations. Wind-driven upwelling dominates in coastal zones, on the shelf, while upwelling associated with southward drifting of the AJ prevails further offshore. The amount of sub-surface water brought up to the surface by each one is of the same order. However, wind-driven upwelling contributes to the fertilization of this region in a major extent because water upwelled by wind is richer in nutrient concentration.
publishDate 2000
dc.date.none.fl_str_mv 2000
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/319435
url http://hdl.handle.net/10261/319435
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Gijón
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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