A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization

The temporal evolution of the physical and biogeochemical properties of the Atlantic Jet (AJ) along the first 75 m of the water column during a 4-day journey was analysed by following the trajectory of a drifter dragged by the jet from the Strait of Gibraltar towards the Alborán Sea. Three stages we...

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Autores: Sala, Iria, Bolado-Penagos, Marina, Bartual, Ana, Bruno, Miguel, García, Carlos M., López Urrutia, Ángel, González-García, Cristina, Echevarría, F.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/272431
Acceso en línea:http://hdl.handle.net/10261/272431
Access Level:acceso abierto
Palabra clave:Submesoscale processes
Chlorophyll patchiness
Phytoplankton
Lagrangian experiment
Strait of Gibraltar
Atlantic Jet
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spelling A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterizationSala, IriaBolado-Penagos, MarinaBartual, AnaBruno, MiguelGarcía, Carlos M.López Urrutia, ÁngelGonzález-García, CristinaEchevarría, F.Submesoscale processesChlorophyll patchinessPhytoplanktonLagrangian experimentStrait of GibraltarAtlantic JetThe temporal evolution of the physical and biogeochemical properties of the Atlantic Jet (AJ) along the first 75 m of the water column during a 4-day journey was analysed by following the trajectory of a drifter dragged by the jet from the Strait of Gibraltar towards the Alborán Sea. Three stages were differentiated based on the evolution of several variables (e.g., velocity, temperature, nutrients, fluorescence). (i) Within the Strait of Gibraltar, the water column was primarily influenced by the tidal cycle, leading to a nutrient-enrichment of surface waters. However, due to the short residence time, the phytoplankton community that was mainly dominated by diatoms, did not demonstrate significant changes. (ii) Once outside the Strait, the drifter trajectory was mainly influenced by the frontal dynamics associated with the AJ. The drifter moved forward along the jet but also laterally across it and was continuously attracted to the mainstream (maximum current speed) or detached to its southern edge (minimum current speed). Due to the associated upwelling processes induced by the intensification of the current along the mainstream, the water column was characterized by colder, nutrient-richer water and lower fluorescence values. Conversely, along the southern edge of the jet, the water column was characterized by higher temperature, low nutrient concentration, and higher fluorescence. Along the first stations of this stage, diatom total abundance and biovolume continuously increased, reaching values 12-times higher than the initial concentrations. (iii) In the last stage, the water parcel was still influenced by the frontal dynamics but with less intensity. Additionally, the colder and denser water of the AJ and the associated phytoplankton community subducted progressively as it moved into the region surrounded by warmer waters. Concomitantly, fluorescence and diatoms total abundance and biovolume decreased and were influenced by the decline of nutrient availability and the increase of mesozooplankton. Our results reveal the coupled processes induced by the entrance of the AJ in the Alborán Sea and highlight the strong control of the physical environment over the ecological processes in this region.The Spanish National Research Plan through project CTM2013-49048 has supported this work. Iria Sala and Marina Bolado-Penagos were supported by a grant of the FPI fellowship program, Spain. To accomplish this work, Iria Sala carried out a short-term stay with the research group Dinámica del Ecosistema Planctónico at the Instituto Español de Oceanografía de Gijón, under the supervision of Dr Ángel López-Urrutia, supported by a grant of the FPI fellowship program .ElsevierMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/272431reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//CTM2013-49048-C2-1-Rinfo:eu-repo/grantAgreement/MINECO//CTM2013-49048-C2-2-RThe underlying dataset has been published as supplementary material of the article in the publisher platform at 10.1016/j.jmarsys.2021.103652http://dx.doi.org/10.1016/j.jmarsys.2021.103652Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2724312026-05-22T06:33:51Z
dc.title.none.fl_str_mv A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
title A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
spellingShingle A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
Sala, Iria
Submesoscale processes
Chlorophyll patchiness
Phytoplankton
Lagrangian experiment
Strait of Gibraltar
Atlantic Jet
title_short A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
title_full A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
title_fullStr A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
title_full_unstemmed A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
title_sort A Lagrangian approach to the Atlantic Jet entering the Mediterranean Sea: Physical and biogeochemical characterization
dc.creator.none.fl_str_mv Sala, Iria
Bolado-Penagos, Marina
Bartual, Ana
Bruno, Miguel
García, Carlos M.
López Urrutia, Ángel
González-García, Cristina
Echevarría, F.
author Sala, Iria
author_facet Sala, Iria
Bolado-Penagos, Marina
Bartual, Ana
Bruno, Miguel
García, Carlos M.
López Urrutia, Ángel
González-García, Cristina
Echevarría, F.
author_role author
author2 Bolado-Penagos, Marina
Bartual, Ana
Bruno, Miguel
García, Carlos M.
López Urrutia, Ángel
González-García, Cristina
Echevarría, F.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Submesoscale processes
Chlorophyll patchiness
Phytoplankton
Lagrangian experiment
Strait of Gibraltar
Atlantic Jet
topic Submesoscale processes
Chlorophyll patchiness
Phytoplankton
Lagrangian experiment
Strait of Gibraltar
Atlantic Jet
description The temporal evolution of the physical and biogeochemical properties of the Atlantic Jet (AJ) along the first 75 m of the water column during a 4-day journey was analysed by following the trajectory of a drifter dragged by the jet from the Strait of Gibraltar towards the Alborán Sea. Three stages were differentiated based on the evolution of several variables (e.g., velocity, temperature, nutrients, fluorescence). (i) Within the Strait of Gibraltar, the water column was primarily influenced by the tidal cycle, leading to a nutrient-enrichment of surface waters. However, due to the short residence time, the phytoplankton community that was mainly dominated by diatoms, did not demonstrate significant changes. (ii) Once outside the Strait, the drifter trajectory was mainly influenced by the frontal dynamics associated with the AJ. The drifter moved forward along the jet but also laterally across it and was continuously attracted to the mainstream (maximum current speed) or detached to its southern edge (minimum current speed). Due to the associated upwelling processes induced by the intensification of the current along the mainstream, the water column was characterized by colder, nutrient-richer water and lower fluorescence values. Conversely, along the southern edge of the jet, the water column was characterized by higher temperature, low nutrient concentration, and higher fluorescence. Along the first stations of this stage, diatom total abundance and biovolume continuously increased, reaching values 12-times higher than the initial concentrations. (iii) In the last stage, the water parcel was still influenced by the frontal dynamics but with less intensity. Additionally, the colder and denser water of the AJ and the associated phytoplankton community subducted progressively as it moved into the region surrounded by warmer waters. Concomitantly, fluorescence and diatoms total abundance and biovolume decreased and were influenced by the decline of nutrient availability and the increase of mesozooplankton. Our results reveal the coupled processes induced by the entrance of the AJ in the Alborán Sea and highlight the strong control of the physical environment over the ecological processes in this region.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/272431
url http://hdl.handle.net/10261/272431
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO//CTM2013-49048-C2-1-R
info:eu-repo/grantAgreement/MINECO//CTM2013-49048-C2-2-R
The underlying dataset has been published as supplementary material of the article in the publisher platform at 10.1016/j.jmarsys.2021.103652
http://dx.doi.org/10.1016/j.jmarsys.2021.103652
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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 15,811543

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