Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)

11 pages, 9 figures, 1 table

Detalhes bibliográficos
Autores: Arjona-Camas, Marta, Puig, Pere, Palanques, Albert, Emelianov, Mikhail, Durán, Ruth
Formato: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2019
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:dnet:digitalcsic_::3675cc8eb02d79ac716b74bf4e4dc340
Acesso em linha:http://hdl.handle.net/10261/189670
Access Level:acceso abierto
Palavra-chave:Northwestern Mediterranean
Resuspension
Bottom trawling
Submarine canyon
Sediment transport
Nepheloid structure
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spelling Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)Arjona-Camas, MartaPuig, PerePalanques, AlbertEmelianov, MikhailDurán, RuthNorthwestern MediterraneanResuspensionBottom trawlingSubmarine canyonSediment transportNepheloid structure11 pages, 9 figures, 1 tableThe temporal evolution of water column turbidity was studied on a submarine canyon on the Barcelona continental margin. From April to June 2014, an instrumented mooring array equipped with an autonomous hydrographic profiler with a CTD and a turbidimeter was deployed in the Foix canyon axis at 870 m depth. The instruments were programmed to collect hydrographic profiles once per day to provide a view of the temporal evolution of water column characteristics from 200 to 800 m water depth. The results illustrate a well-defined water turbidity structure of particulate matter distributed in intermediate nepheloid layers (INLs) developed between 300 and 500 m water depth and above the canyon rims, and INLs and near-bottom nepheloid layers (BNLs) confined inside the canyon between 650 and 800 m water depth. Data from fishing vessels activity at the time of the deployment was obtained from Vessel Monitoring System (VMS). The presence and location of the fishing vessels in the study area suggested a relationship between trawling activity and the generation of such layers. Nepheloid layers were absent during the first part of the deployment, when there was no fishing activity within the Foix Canyon axis or at the adjacent continental slope. Later, with the beginning of trawling activity on the fishing grounds close to the canyon, both INLs and BNLs were observed in the profiling casts, suggesting a causative relationship with fishing activities. Additionally, the hydrodynamic conditions within the canyon also seem to favour particle retention and to increase water turbidity in thick BNLs when water circulation is directed up-canyon. Bottom trawling appears to act as a main sediment resuspension mechanism in the Barcelona continental slope regions, increasing suspended sediment concentration at specific water depths where fishing grounds are located. Suspended particles are then advected and propagate along and across-margin by ambient currents via nepheloid layersThis work has been supported by FORMED (CGL2012-33989) and ABIDES (CTM2015-65142-R) Spanish Projects. M. Arjona-Camas is supported by a predoctoral F.P.I. grant from the Spanish Ministry of Economy, Industry and Competitiveness. M. A-C, P. P., A. P. and R. D. belong to CRG on Littoral and Oceanic Processes, supported by Grant 2017 SGR 863 of the Generalitat de Catalunya, and M. E. belongs to CRG on Physical and Technological Oceanography (SGR 1241, 2017 of the Generalitat de Catalunya).Peer ReviewedElsevierMinisterio de Economía y Competitividad (España)Ministerio de Economía, Industria y Competitividad (España)Generalitat de CatalunyaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920192019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/189670reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-65142-Rhttps://doi.org/10.1016/j.jmarsys.2019.05.003Síinfo:eu-repo/semantics/openAccessoai:dnet:digitalcsic_::3675cc8eb02d79ac716b74bf4e4dc3402026-05-22T06:33:51Z
dc.title.none.fl_str_mv Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
title Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
spellingShingle Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
Arjona-Camas, Marta
Northwestern Mediterranean
Resuspension
Bottom trawling
Submarine canyon
Sediment transport
Nepheloid structure
title_short Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
title_full Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
title_fullStr Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
title_full_unstemmed Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
title_sort Evidence of trawling-induced resuspension events in the generation of nepheloid layers in the Foix submarine canyon (NW Mediterranean)
dc.creator.none.fl_str_mv Arjona-Camas, Marta
Puig, Pere
Palanques, Albert
Emelianov, Mikhail
Durán, Ruth
author Arjona-Camas, Marta
author_facet Arjona-Camas, Marta
Puig, Pere
Palanques, Albert
Emelianov, Mikhail
Durán, Ruth
author_role author
author2 Puig, Pere
Palanques, Albert
Emelianov, Mikhail
Durán, Ruth
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Ministerio de Economía, Industria y Competitividad (España)
Generalitat de Catalunya
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Northwestern Mediterranean
Resuspension
Bottom trawling
Submarine canyon
Sediment transport
Nepheloid structure
topic Northwestern Mediterranean
Resuspension
Bottom trawling
Submarine canyon
Sediment transport
Nepheloid structure
description 11 pages, 9 figures, 1 table
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/189670
url http://hdl.handle.net/10261/189670
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/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-65142-R
https://doi.org/10.1016/j.jmarsys.2019.05.003
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 15,812455

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