Glider and satellite monitoring of the variability of the suspended particle distribution and size in the Rhône ROFI

Many, Gaël, Bourrin, François, Durrieu De Madron, Xavier, Ody, Anouck, Doxaran, David and Cauchy, Pierre (2018) Glider and satellite monitoring of the variability of the suspended particle distribution and size in the Rhône ROFI. Progress in Oceanography, 163. pp. 123-135. ISSN 0079-6611

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Abstract

An experiment was carried out in the Gulf of Lions (NW Mediterranean) in February 2014 to assess the temporal and spatial variability of the distribution and size of suspended particulate matter (SPM) in the Rhône Region of Freshwater Influence (ROFI). A set of observations from an autonomous underwater glider, satellite ocean color data, and meteorological and hydrological time-series data highlighted the high variability of the Rhône River surface turbid plume and presence of a bottom nepheloid layer (BNL) that depended on wind and river discharge conditions. While continental winds pushed the surface plume offshore, marine winds pressed the plume at the coast and favored the sedimentation of as well as nourishment of the BNL. Moderate storm events favored breakage of the plume stratification and along-shelf transport of Rhône River particles. The spectral slopes of glider and satellite-derived light backscattering coefficients, γ, were used as a proxies of the SPM size distribution. The results clearly showed that the change of the SPM size in the nepheloid layers was induced by the flocculation of fine sediments, which became finer seaward throughout the ROFI, as well as the effect of rough weather in the breakup of flocs.

Item Type: Article
Uncontrolled Keywords: nepheloid layers,rofi,gulf of lions,rhône river,flood,glider
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science
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Depositing User: Pure Connector
Date Deposited: 03 Jun 2017 05:08
Last Modified: 22 Jul 2020 01:35
URI: https://ueaeprints.uea.ac.uk/id/eprint/63678
DOI: 10.1016/j.pocean.2017.05.006

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