Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)

Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)

Symposium on Integrating New Advances in Mediterranean Oceanography and Marine Biology, 26-29 November 2013, Institut de Ciències del Mar (CSIC), Barcelona, Catalunya, Spain

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Main Authors: Ribó, Marta, Puig, Pere
Format: póster de congreso biblioteca
Language:English
Published: 2013-11-26
Online Access:http://hdl.handle.net/10261/96669
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spelling dig-icm-es-10261-966692019-03-06T13:55:35Z Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean) Ribó, Marta Puig, Pere Symposium on Integrating New Advances in Mediterranean Oceanography and Marine Biology, 26-29 November 2013, Institut de Ciències del Mar (CSIC), Barcelona, Catalunya, Spain Studies of hydrodynamics and particulate matter distribution on the NW Mediterranean have described nepheloid layers on the continental shelf and slope, suggesting that these layers could be generated and/or maintained by the interaction of internal waves with the seafloor. On the Gulf of Valencia (GoV) continental slope several intermediate (INL) and bottom (BNL) nepheloid layers were observed, focussed where the Levantine Intermediate Waters (LIW) interacts with the seafloor. Additionally, direct observations of internal waves have been recently recorded on the GoV slope. The present study has the intention to improve the understanding on the hydrographic structure and the regional circulation of the GoV and discuss the relation with the sediment dynamics on the continental slope. Two instrument moorings were deployed from February to June 2011 and from October 2011 to March 2012, on the GoV continental slope, at 450 m and 572 m water depth, respectively. The slope morphology was considered to locate the mooring lines, which were deployed on structural heights to avoid interfering with the bottom trawling activities from the local fishing fleets. Direct observations of current velocity components and temperature allowed detecting several water mass types on the sampled water column. The interface between the LIW and the Western Mediterranean Deep Water (WMDW) was observed on the two mooring lines and appear to be controlled by 5-11 day oscillation linked to the passage of topographic waves. Several intrusions of cold Western Mediterranean Intermediate Water (WIW) mass were observed in both records, coinciding with changes in the current speed and direction. During the second deployment, the near-bottom currents were affected by a strong Ekman veering, contributing to the off-margin sediment transport near the sea floor. Observations of suspended sediment concentration (SSC) showed multiple increases, up to 5 mg/l, in the near-bottom turbidity throughout the records. However, these SSC variations were poorly correlated with changes in velocity magnitude and direction or with temperature oscillations. In addition, no resuspension peaks were observed linked to the presence of internal waves. These results suggest that other potential sediment resuspension mechanism unrelated with current fluctuations might play an important key in the present-day sedimentary dynamics. Bottom trawling appears to be the most plausible mechanism Peer reviewed 2014-05-14T09:14:55Z 2014-05-14T09:14:55Z 2013-11-26 póster de congreso http://purl.org/coar/resource_type/c_6670 Integrating New Advances in Mediterranean Oceanography and Marine Biology. Meeting program: 57 (2013) http://hdl.handle.net/10261/96669 en http://www.icm.csic.es/bio/medocean/information.htm#schedule none
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
description Symposium on Integrating New Advances in Mediterranean Oceanography and Marine Biology, 26-29 November 2013, Institut de Ciències del Mar (CSIC), Barcelona, Catalunya, Spain
format póster de congreso
author Ribó, Marta
Puig, Pere
spellingShingle Ribó, Marta
Puig, Pere
Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)
author_facet Ribó, Marta
Puig, Pere
author_sort Ribó, Marta
title Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)
title_short Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)
title_full Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)
title_fullStr Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)
title_full_unstemmed Hydrodynamics and sediment transport on the Gulf of Valencia continental slope (NW Mediterranean)
title_sort hydrodynamics and sediment transport on the gulf of valencia continental slope (nw mediterranean)
publishDate 2013-11-26
url http://hdl.handle.net/10261/96669
work_keys_str_mv AT ribomarta hydrodynamicsandsedimenttransportonthegulfofvalenciacontinentalslopenwmediterranean
AT puigpere hydrodynamicsandsedimenttransportonthegulfofvalenciacontinentalslopenwmediterranean
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