Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)

Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)

14 pages, 9 figures

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Bibliographic Details
Main Authors: Palanques, Albert, Martín, Jacobo, Puig, Pere, Guillén, Jorge, Company, Joan B., Sardà, Francisco
Format: artículo biblioteca
Language:English
Published: Elsevier 2006-02
Subjects:Submarine canyon, Sediment gravity flows, Trawling, Turbidity, Northwestern Mediterranean, Catalonia,
Online Access:http://hdl.handle.net/10261/27040
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spelling dig-icm-es-10261-270402020-11-12T08:22:29Z Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean) Palanques, Albert Martín, Jacobo Puig, Pere Guillén, Jorge Company, Joan B. Sardà, Francisco Submarine canyon Sediment gravity flows Trawling Turbidity Northwestern Mediterranean Catalonia 14 pages, 9 figures Three mooring arrays were deployed in the Palamós Canyon axis with sediment traps, current meters and turbidimeters installed near the bottom and in intermediate waters. Frequent sharp and fast turbidity peaks along with current speed increases were recorded, particularly at 1200m depth in spring and summer. During these events, near-bottom water turbidity increased by up to more than one order of magnitude, current velocity by two to four times and horizontal sediment fluxes by one to three orders of magnitude. When these events occurred, 9-11 days integrated downward particle fluxes collected by the near-bottom sediment trap increased by two to three times. These events were identified as sediment gravity flows triggered by trawling activities along the northern canyon wall. Sediment eroded by the trawling nets at 400-750m depth on this wall seems to be channeled through a gully and transported downslope towards the canyon axis, where the 1200m mooring was located. The sediment gravity flows recorded at the 1200m site were not detected at deeper instrumented sites along the canyon axis, suggesting that they affect local areas of the canyon without traveling long distances downcanyon. These observations indicate that trawling can generate frequent sediment gravity flows and increase sediment fluxes locally in submarine canyons. Furthermore, in addition to the various natural processes currently causing sediment gravity flows and other sediment transport events, human activities such as trawling must be taken into account in modern submarine canyon sediment dynamics studies This work was carried out in the framework of the CANYON project funded by the ‘‘Dirección General de Enseñanza Superior e Investigación Científica’’ Ref MAR99-1060-CO3-01, 02 and 03 Peer reviewed 2010-08-12T12:14:28Z 2010-08-12T12:14:28Z 2006-02 artículo http://purl.org/coar/resource_type/c_6501 Deep Sea Research Part I: Oceanographic Research Papers 53(2): 201-214(2006) 0967-0637 http://hdl.handle.net/10261/27040 10.1016/j.dsr.2005.10.003 en https://doi.org/10.1016/j.dsr.2005.10.003 none 5867 bytes application/pdf Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Submarine canyon
Sediment gravity flows
Trawling
Turbidity
Northwestern Mediterranean
Catalonia
Submarine canyon
Sediment gravity flows
Trawling
Turbidity
Northwestern Mediterranean
Catalonia
spellingShingle Submarine canyon
Sediment gravity flows
Trawling
Turbidity
Northwestern Mediterranean
Catalonia
Submarine canyon
Sediment gravity flows
Trawling
Turbidity
Northwestern Mediterranean
Catalonia
Palanques, Albert
Martín, Jacobo
Puig, Pere
Guillén, Jorge
Company, Joan B.
Sardà, Francisco
Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)
description 14 pages, 9 figures
format artículo
topic_facet Submarine canyon
Sediment gravity flows
Trawling
Turbidity
Northwestern Mediterranean
Catalonia
author Palanques, Albert
Martín, Jacobo
Puig, Pere
Guillén, Jorge
Company, Joan B.
Sardà, Francisco
author_facet Palanques, Albert
Martín, Jacobo
Puig, Pere
Guillén, Jorge
Company, Joan B.
Sardà, Francisco
author_sort Palanques, Albert
title Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)
title_short Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)
title_full Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)
title_fullStr Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)
title_full_unstemmed Evidence of sediment gravity flows induced by trawling in the Palamós (Fonera) submarine canyon (northwestern Mediterranean)
title_sort evidence of sediment gravity flows induced by trawling in the palamós (fonera) submarine canyon (northwestern mediterranean)
publisher Elsevier
publishDate 2006-02
url http://hdl.handle.net/10261/27040
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AT martinjacobo evidenceofsedimentgravityflowsinducedbytrawlinginthepalamosfonerasubmarinecanyonnorthwesternmediterranean
AT puigpere evidenceofsedimentgravityflowsinducedbytrawlinginthepalamosfonerasubmarinecanyonnorthwesternmediterranean
AT guillenjorge evidenceofsedimentgravityflowsinducedbytrawlinginthepalamosfonerasubmarinecanyonnorthwesternmediterranean
AT companyjoanb evidenceofsedimentgravityflowsinducedbytrawlinginthepalamosfonerasubmarinecanyonnorthwesternmediterranean
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