Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading

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 (...

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Autores: Pasqual Mas, Catalina, Sanchez-Vidal, Anna, Zúñiga, Diana, Calafat Frau, Antoni, Canals Artigas, Miquel, Durrieu de Madron, Xavier, Puig, Pere, Heussner, Serge, Palanques Monteys, Albert, Delsaut, N.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/155942
Acesso em linha:https://hdl.handle.net/2445/155942
Access Level:acceso abierto
Palavra-chave:Biogeoquímica
Mediterrània (Mar)
Biogeochemistry
Mediterranean Sea
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spelling Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascadingPasqual Mas, CatalinaSanchez-Vidal, AnnaZúñiga, DianaCalafat Frau, AntoniCanals Artigas, MiquelDurrieu de Madron, XavierPuig, PereHeussner, SergePalanques Monteys, AlbertDelsaut, N.BiogeoquímicaMediterrània (Mar)BiogeochemistryMediterranean SeaSettling 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 eventsEuropean Geosciences Union (EGU)2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/155942Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.5194/bg-7-217-2010Biogeosciences, 2010, vol. 7, p. 217-231https://doi.org/10.5194/bg-7-217-2010cc-by (c) Pasqual Mas, Catalina et al., 2010http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1559422026-05-27T06:46:51Z
dc.title.none.fl_str_mv Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
spellingShingle Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
Pasqual Mas, Catalina
Biogeoquímica
Mediterrània (Mar)
Biogeochemistry
Mediterranean Sea
title_short Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_full Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_fullStr Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_full_unstemmed Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
title_sort Settling particle fluxes across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
dc.creator.none.fl_str_mv Pasqual Mas, Catalina
Sanchez-Vidal, Anna
Zúñiga, Diana
Calafat Frau, Antoni
Canals Artigas, Miquel
Durrieu de Madron, Xavier
Puig, Pere
Heussner, Serge
Palanques Monteys, Albert
Delsaut, N.
author Pasqual Mas, Catalina
author_facet Pasqual Mas, Catalina
Sanchez-Vidal, Anna
Zúñiga, Diana
Calafat Frau, Antoni
Canals Artigas, Miquel
Durrieu de Madron, Xavier
Puig, Pere
Heussner, Serge
Palanques Monteys, Albert
Delsaut, N.
author_role author
author2 Sanchez-Vidal, Anna
Zúñiga, Diana
Calafat Frau, Antoni
Canals Artigas, Miquel
Durrieu de Madron, Xavier
Puig, Pere
Heussner, Serge
Palanques Monteys, Albert
Delsaut, N.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Biogeoquímica
Mediterrània (Mar)
Biogeochemistry
Mediterranean Sea
topic Biogeoquímica
Mediterrània (Mar)
Biogeochemistry
Mediterranean Sea
description 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
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/155942
url https://hdl.handle.net/2445/155942
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.5194/bg-7-217-2010
Biogeosciences, 2010, vol. 7, p. 217-231
https://doi.org/10.5194/bg-7-217-2010
dc.rights.none.fl_str_mv cc-by (c) Pasqual Mas, Catalina et al., 2010
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Pasqual Mas, Catalina et al., 2010
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv European Geosciences Union (EGU)
publisher.none.fl_str_mv European Geosciences Union (EGU)
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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