Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)

Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)

Special issue Fluxes Across a Narrow Shelf.-- 19 pages, 9 figures, 4 tables.-- This is a contribution to the IGCP project No. 396: Continental Shelves in the Quaternary

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Bibliographic Details
Main Authors: Palanques, Albert, Puig, Pere, Guillén, Jorge, Jiménez-Quintana, José Antonio, Gràcia, Vicenç, Sánchez-Arcilla, Agustín, Madsen, O.
Other Authors: European Commission
Format: artículo biblioteca
Published: Pergamon Press 2002-01
Subjects:Shear stress, Suspended sediment, Ebro continental shelf, Sediment resuspension, Sediment fluxes,
Online Access:http://hdl.handle.net/10261/194258
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100007273
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spelling dig-icm-es-10261-1942582020-12-12T16:59:32Z Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean) Palanques, Albert Puig, Pere Guillén, Jorge Jiménez-Quintana, José Antonio Gràcia, Vicenç Sánchez-Arcilla, Agustín Madsen, O. European Commission Comisión Interministerial de Ciencia y Tecnología, CICYT (España) Shear stress Suspended sediment Ebro continental shelf Sediment resuspension Sediment fluxes Special issue Fluxes Across a Narrow Shelf.-- 19 pages, 9 figures, 4 tables.-- This is a contribution to the IGCP project No. 396: Continental Shelves in the Quaternary Near-bottom sediment fluxes were measured at several locations across the Ebro continental shelf during the FANS Project. Moored current meters and transmissometers were installed near the bottom at 12, 60 and 100 m water depth. Measurements of near-bottom currents and water turbidity in combination with wave data provided information about physical forcing and resulting resuspension and sediment fluxes on this Mediterranean continental shelf. Mean near-bottom sediment fluxes decrease sharply (by one to two orders of magnitude) from the inner to the mid-shelf and more gradually from the mid- to the outer shelf. The resulting near-bottom sediment fluxes are towards the SW and the alongshelf fluxes are about one order of magnitude higher than the across-shelf fluxes. Maximum near-bottom sediment fluxes occur by sediment resuspension on the inner shelf during storm events when wave shear stress increases. Wave shear stresses decrease with depth and sediment resuspension by waves occurs quite often (about 30% of the time) on the inner shelf, very sporadically (<0.5% of the time) on the mid-shelf (during the strongest storms) and never on the outer shelf. Near-bottom currents can resuspend bottom sediment only on the inner shelf, although very sporadically (<0.5% of the time). The lowest mean current shear stress is on the mid-shelf, where wave shear stresses are insignificant most of the time and finer sediment accumulates. On the outer shelf, the current shear stress increases, causing the winnowing of fine sediments and preventing the relict transgressive sands from being covered by mud. These conditions differ from those of shelves with strong tides and long period waves, where resuspension by waves reaches the outer shelf and the across- and alongshelf sediment fluxes have the same order of magnitude. © 2002 Elsevier Science Ltd. All rights reserved This work was carried out in the framework of the FANS project funded by the EU (MAS3-CT95-0037) and received support from the project MAR96-1781-CO2-01 and MAR96-2268-C03-01-CE funded by the CICYT Peer Reviewed 2019-11-11T09:16:45Z 2019-11-11T09:16:45Z 2002-01 2019-11-11T09:16:45Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/S0278-4343(01)00058-9 issn: 0278-4343 e-issn: 1873-6955 Continental Shelf Research 22(2): 285-303 (2002) http://hdl.handle.net/10261/194258 10.1016/S0278-4343(01)00058-9 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100007273 https://doi.org/10.1016/S0278-4343(01)00058-9 Sí none Pergamon Press
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
topic Shear stress
Suspended sediment
Ebro continental shelf
Sediment resuspension
Sediment fluxes
Shear stress
Suspended sediment
Ebro continental shelf
Sediment resuspension
Sediment fluxes
spellingShingle Shear stress
Suspended sediment
Ebro continental shelf
Sediment resuspension
Sediment fluxes
Shear stress
Suspended sediment
Ebro continental shelf
Sediment resuspension
Sediment fluxes
Palanques, Albert
Puig, Pere
Guillén, Jorge
Jiménez-Quintana, José Antonio
Gràcia, Vicenç
Sánchez-Arcilla, Agustín
Madsen, O.
Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)
description Special issue Fluxes Across a Narrow Shelf.-- 19 pages, 9 figures, 4 tables.-- This is a contribution to the IGCP project No. 396: Continental Shelves in the Quaternary
author2 European Commission
author_facet European Commission
Palanques, Albert
Puig, Pere
Guillén, Jorge
Jiménez-Quintana, José Antonio
Gràcia, Vicenç
Sánchez-Arcilla, Agustín
Madsen, O.
format artículo
topic_facet Shear stress
Suspended sediment
Ebro continental shelf
Sediment resuspension
Sediment fluxes
author Palanques, Albert
Puig, Pere
Guillén, Jorge
Jiménez-Quintana, José Antonio
Gràcia, Vicenç
Sánchez-Arcilla, Agustín
Madsen, O.
author_sort Palanques, Albert
title Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)
title_short Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)
title_full Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)
title_fullStr Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)
title_full_unstemmed Near-bottom suspended sediment fluxes on the microtidal low-energy Ebro continental shelf (NW Mediterranean)
title_sort near-bottom suspended sediment fluxes on the microtidal low-energy ebro continental shelf (nw mediterranean)
publisher Pergamon Press
publishDate 2002-01
url http://hdl.handle.net/10261/194258
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100007273
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