Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences

16 pages, 7 figures, 4 tables

Detalles Bibliográficos
Autores: Rosón, Gabriel, Álvarez-Salgado, Xosé Antón, Pérez, Fiz F.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:1999
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/25326
Acceso en línea:http://hdl.handle.net/10261/25326
Access Level:acceso abierto
Palabra clave:Carbon fluxes
Biogeochemical cycling
Upwelling stress-relaxation
Downwelling
Rías Baixas (NW Spain)
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spelling Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differencesRosón, GabrielÁlvarez-Salgado, Xosé AntónPérez, Fiz F.Carbon fluxesBiogeochemical cyclingUpwelling stress-relaxationDownwellingRías Baixas (NW Spain)16 pages, 7 figures, 4 tablesCarbon species fluxes and net budgets were studied with a 2-D box model in the Ría de Arousa (Spain), a large indentation in the NW Iberian upwelling system. The embayment acted as a CO2 source to the atmosphere during the upwelling season (average CO2 flux across the seawater-air interface, FCO2 = +16 mg C m-2 d-1), despite the elevated net community production (NCP) rates (average NCP = 0.84 g C m-2 d-1). The high pCO2 levels in source Eastern North Atlantic Central Water (ENACW) and the reduced residence times within the Ría (~6 d) seem to be the reasons for the observed FCO2. The CO2 increase associated with CaCO3 fixation by the intensive culture of mussels on hanging ropes did not affect FCO2 significantly. High FCO2 values were observed during strong upwelling, which was 3 times larger than the average during the upwelling season. Under these conditions the CO2-rich source ENACW reached the surface and this coincided with low phytoplankton production (NCP = -0.01 g C m-2 d-1). Source ENACW was enriched within the Ría with carbon released from the sediments. FCO2 was reduced to 1/3 of its value compared to the average upwelling season under conditions of moderate upwelling. Phytoplankton grew rapidly (average NCP = 1.49 g C m-2 d-1) at the expense of the gentle injection of new nutrients at the base of the pycnocline. Negligible FCO2 values were observed during upwelling relaxations, when ENACW into the Ría was replaced by the warm and CO2-equilibrated shelf surface waters. FCO2 reached a maximum during a strong autumn downwelling event because of the concurrence of warm shelf surface water flow into the Ría with strong carbon release from the sediments. CO2 fluxes per unit area always increased coastwards, because of the progressive CO2 enrichment of the source ENACW as it enters the embayment and the decrease of residence timesSupport for this work came from C.I.C.Y.T grant number MAR88-0245 and funds from the Conselleria de Pesca da Xunta de Galicia. Fellowships from the Spanish M.E.C have enable X.A.A.-S. and G.R. to carry out their Ph.D. theses as part of this projectPeer reviewedInter ResearchComisión Interministerial de Ciencia y Tecnología, CICYT (España)Xunta de GaliciaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201020101999info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersion1423814 bytesapplication/pdfhttp://hdl.handle.net/10261/25326reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3354/meps176215Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/253262026-05-22T06:33:51Z
dc.title.none.fl_str_mv Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
title Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
spellingShingle Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
Rosón, Gabriel
Carbon fluxes
Biogeochemical cycling
Upwelling stress-relaxation
Downwelling
Rías Baixas (NW Spain)
title_short Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
title_full Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
title_fullStr Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
title_full_unstemmed Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
title_sort Carbon cycling in a large coastal embayment, affected by wind-driven upwelling: short-time-scale variability and spatial differences
dc.creator.none.fl_str_mv Rosón, Gabriel
Álvarez-Salgado, Xosé Antón
Pérez, Fiz F.
author Rosón, Gabriel
author_facet Rosón, Gabriel
Álvarez-Salgado, Xosé Antón
Pérez, Fiz F.
author_role author
author2 Álvarez-Salgado, Xosé Antón
Pérez, Fiz F.
author2_role author
author
dc.contributor.none.fl_str_mv Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
Xunta de Galicia
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Carbon fluxes
Biogeochemical cycling
Upwelling stress-relaxation
Downwelling
Rías Baixas (NW Spain)
topic Carbon fluxes
Biogeochemical cycling
Upwelling stress-relaxation
Downwelling
Rías Baixas (NW Spain)
description 16 pages, 7 figures, 4 tables
publishDate 1999
dc.date.none.fl_str_mv 1999
2010
2010
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/10261/25326
url http://hdl.handle.net/10261/25326
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3354/meps176215
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1423814 bytes
application/pdf
dc.publisher.none.fl_str_mv Inter Research
publisher.none.fl_str_mv Inter Research
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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