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Czasopismo
2017 | 59 | 1 |
Tytuł artykułu

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

Treść / Zawartość
Warianty tytułu
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 l1 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.
Wydawca
-
Czasopismo
Rocznik
Tom
59
Numer
1
Opis fizyczny
p.28-36,fig.,ref.
Twórcy
autor
  • Laboratoire de Genie Cotier et Environnement (LGCE), Cerema/DTecEMF/DS, Plouzane, France
autor
  • Laboratoire de Genie Cotier et Environnement (LGCE), Cerema/DTecEMF/DS, Plouzane, France
  • ODE-DYNECO-PELAGOS, Ifremer, Centre de Bretagne, Technople Brest-Iroise, Plouzane, France
autor
  • Laboratoire de Genie Cotier et Environnement (LGCE), Cerema/DTecEMF/DS, Plouzane, France
autor
  • ODE-DYNECO-PELAGOS, Ifremer, Centre de Bretagne, Technople Brest-Iroise, Plouzane, France
Bibliografia
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-cb69d4da-d5a4-41e4-97db-1871344ac9ee
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