Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading

15 páginas, 8 figuras, 3 tablas.

Detalles Bibliográficos
Autores: Pasqual, Catalina, Sánchez-Vidal, Anna, Zúñiga, Diana, Calafat, Antoni, Canals, Miquel, Durrieu de Madron, Xavier, Puig, Pere, Heussner, Serge, Palanques, Albert, Delsaut, N.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/27159
Acceso en línea:http://hdl.handle.net/10261/27159
Access Level:acceso abierto
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spelling Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascadingPasqual, CatalinaSánchez-Vidal, AnnaZúñiga, DianaCalafat, AntoniCanals, MiquelDurrieu de Madron, XavierPuig, PereHeussner, SergePalanques, AlbertDelsaut, N.15 páginas, 8 figuras, 3 tablas.Settling particles were collected using sediment traps deployed along three transects in the Lacaze-Duthiers and Cap de Creus canyons and the adjacent southern open slope from October 2005 to October 2006. The settling material was analyzed to obtain total mass fluxes and main constituent contents (organic matter, opal, calcium carbonate, and siliciclastics). Cascades of dense shelf water from the continental shelf edge to the lower continental slope occurred from January to March 2006. They were traced through strong negative near-bottom temperature anomalies and increased current speeds, and generated two intense pulses of mass fluxes in January and March 2006. This oceanographic phenomenon appeared as the major physical forcing of settling particles at almost all stations, and caused both high seasonal variability in mass fluxes and important qualitative changes in settling material. Fluxes during the dense shelf water cascading (DSWC) event ranged from 90.1 g m−2 d−1 at the middle Cap de Creus canyon (1000 m) to 3.2 g m−2 d−1 at the canyon mouth (1900 m). Fractions of organic matter, opal and calcium carbonate components increased seaward, thus diminishing the siliciclastic fraction. Temporal variability of the major components was larger in the canyon mouth and open slope sites, due to the mixed impact of dense shelf water cascading processes and the pelagic biological production. Results indicate that the cascading event remobilized and homogenized large amounts of material down canyon and southwardly along the continental slope contributing to a better understanding of the off-shelf particle transport and the internal dynamics of DSWC events.This research has been supported by HERMES (GOCE-CT-2005-511234-1), SESAME (GOCE-036949), HERMIONE (FP7-ENV-2008-1-226354), and GRACCIE (CSD2007-00067, Consolider-Ingenio Program) research projects, a Generalitat de Catalunya “Grups de Recerca Consolidats” grant (2009 SGR-1305) and a FP7 Marie Curie Reintegration Grant (PERG04-GA-2008-239175). C. Pasqual is supported by an F.P.U. grant from the Spanish government.Peer reviewedCopernicus Publications201020102010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersion6033820 bytesapplication/pdfhttp://hdl.handle.net/10261/27159reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/226354http://dx.doi.org/10.5194/bg-7-217-2010info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/271592026-05-22T06:33:51Z
dc.title.none.fl_str_mv Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
spellingShingle Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
Pasqual, Catalina
title_short Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_full Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_fullStr Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_full_unstemmed Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_sort Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
dc.creator.none.fl_str_mv Pasqual, Catalina
Sánchez-Vidal, Anna
Zúñiga, Diana
Calafat, Antoni
Canals, Miquel
Durrieu de Madron, Xavier
Puig, Pere
Heussner, Serge
Palanques, Albert
Delsaut, N.
author Pasqual, Catalina
author_facet Pasqual, Catalina
Sánchez-Vidal, Anna
Zúñiga, Diana
Calafat, Antoni
Canals, Miquel
Durrieu de Madron, Xavier
Puig, Pere
Heussner, Serge
Palanques, Albert
Delsaut, N.
author_role author
author2 Sánchez-Vidal, Anna
Zúñiga, Diana
Calafat, Antoni
Canals, Miquel
Durrieu de Madron, Xavier
Puig, Pere
Heussner, Serge
Palanques, Albert
Delsaut, N.
author2_role author
author
author
author
author
author
author
author
author
description 15 páginas, 8 figuras, 3 tablas.
publishDate 2010
dc.date.none.fl_str_mv 2010
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/10261/27159
url http://hdl.handle.net/10261/27159
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/226354
http://dx.doi.org/10.5194/bg-7-217-2010
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 6033820 bytes
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
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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