The impact of tides and waves on near-surface suspended sediment concentrations in the English Channel

• Autorzy: Guillou N. , Rivier A. , Chapalain G. , Gohin F.

Identyfikatory

DOI

10.1016/j.oceano.2016.06.002

• Języki publikacji: EN

Abstrakty

EN

Numerous ecological problems of continental shelf ecosystems require a refined knowledge of the evolution of suspended sediment concentrations (SSC). The present investigation focuses on the spatial and temporal variabilities of near-surface SSC in coastal waters of the English Channel (western Europe) by exploiting numerical predictions from the Regional Ocean Modeling System ROMS. Extending previous investigations of ROMS performances in the Channel, this analysis refines, with increased spatial and temporal resolutions, the characterization of near-surface SSC patterns revealing areas where concentrations are highly correlated with evolutions of tides and waves. Significant tidal modulations of near-surface concentrations are thus found in the eastern English Channel and the French Dover Strait while a pronounced influence of waves is exhibited in the Channel Islands Gulf. Coastal waters present furthermore strong SSC temporal variations, particularly noticeable during storm events of autumn and winter, with maximum near-surface concentrations exceeding 40 mg l⁻¹ and increase by a factor from 10 to 18 in comparison with time-averaged concentrations. This temporal variability strongly depends on the granulometric distribution of suspended sediments characterized by local bimodal contributions of silts and sands off coastal irregularities of the Isle of Wight, the Cotentin Peninsula and the southern Dover Strait.

Słowa kluczowe

EN

sediment transport; numerical modelling; satellite; ROMS; Regional Ocean Modeling System; MERIS; MODIS

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2017
• Tom: No. 59 (1)
• Strony: 28--36
• Opis fizyczny: Bibliogr. 38 poz., mapy, wykr.

Twórcy

autor

Guillou N.

• Laboratoire de Génie Côtier et Environnement (LGCE), Cerema/DTecEMF/DS, Plouzané, France

autor

Rivier A.

• Laboratoire de Génie Côtier et Environnement (LGCE), Cerema/DTecEMF/DS, Plouzané, France
• ODE-DYNECO-PELAGOS, Ifremer, Centre de Bretagne, Technople Brest-Iroise, Plouzané, France

autor

Chapalain G.

• Laboratoire de Génie Côtier et Environnement (LGCE), Cerema/DTecEMF/DS, Plouzané, France

autor

Gohin F.

• ODE-DYNECO-PELAGOS, Ifremer, Centre de Bretagne, Technople Brest-Iroise, Plouzané, France

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).