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J. Mar. Sci. Eng. 2015, 3(2), 193-215; doi:10.3390/jmse3020193

Modeling Near-Surface Suspended Sediment Concentration in the English Channel

1
Laboratoire de Génie Côtier et Environnement, DTEMF/DS, Cerema, Technopôle Brest-Iroise, BP 5, 29280 Plouzané, France
2
ODE-DYNECO-PELAGOS, Ifremer, Centre de Bretagne, Technopôle Brest-Iroise, 29280 Plouzané, France
*
Author to whom correspondence should be addressed.
Academic Editor: Billy Edge
Received: 13 February 2015 / Accepted: 21 April 2015 / Published: 5 May 2015
(This article belongs to the Special Issue Sediment Transport Modeling)
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Abstract

The present study investigates the performances of the three-dimensional multicomponent hydro-sedimentary model ROMS (Regional Ocean Modeling System) to predict near-surface suspended sediment concentrations (SSC) in the English Channel (western Europe). Predictions are assessed against satellite-retrieved observations from raw MODIS and MERIS images for the year 2008 characterized by the highest availability of cloud-free data. Focus is put on improvements obtained with: (1) SSC inputs at the open boundaries; and (2) simple parameterizations of the settling velocity and the critical shear stress. Sensitivity studies confirm the importance of the advection of fine-grained suspended sediments in the central waters of the English Channel exhibiting benefits of refined SSC estimations along the sea boundaries. Improvements obtained with modified formulations of the settling velocity and the critical shear stress finally suggest possible seasonal influences of biological activity and thermal stratification on near-surface SSC. View Full-Text
Keywords: ROMS; satellite; MERIS; MODIS; tide; wave ROMS; satellite; MERIS; MODIS; tide; wave
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Guillou, N.; Rivier, A.; Gohin, F.; Chapalain, G. Modeling Near-Surface Suspended Sediment Concentration in the English Channel. J. Mar. Sci. Eng. 2015, 3, 193-215.

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