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Distribution spatio-temporelle des éléments Fe, Al, Mn, Ca, Mg, Ti et V particulaires dans le détroit du Pas-de-Calais ArchiMer
Douez, C; Statham, P; Auger, Y; Choisy, P; Deram, L; Dupont, Jp; Fischer, Jc; Puskaric, E; Wartel, M.
Within the framework of the European Fluxmanche programme, 92 samplings of suspended particulate matter were collected during eight cruises through the Dover Strait. The mean concentrations obtained for Al (44.3 mg/g), Fe (27.4 mg/g) and Ca (110 mg/g) are comparable to those obtained by Nolting and Eisma in January 1980. However, the concentrations of Mn (0.585 mg/g) Ti (3.14 mg/g) and V (0.225 mg/g) are twice as large. An important gradient of concentration is observed between the coastal and offshore waters, reflecting coastal erosion and human activities. Detailed examination of the contents of the major elements indicates that these remain practically constant in the particulate matter during a tidal cycle. On the other hand, the concentrations of...
Tipo: Text Palavras-chave: SUSPENDED MATTER; TRACE-METAL; DOVER STRAIT; MANGANESE; SEA WATER.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00100/21141/18761.pdf
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Annual variations in suspended particulate matter within the Dover Strait ArchiMer
Dupont, Jp; Collins, Mb; Lafite, R; Nash, L; Huault, Mf; Shimwell, Sj; Chaddock, S; Brunet, C; Wartel, M; Lamboy, M.
During a survey at six stations in the Dover Strait, from July 1990 to November 1991, water samples were collected to measure : suspended sediment load and its organic content; particle characteristics; photosynthesis pigments; and heavy metals. In this contribution, particle measurements are interpreted in terms of hydrodynamical effects and seasonal evolution. Multi-modal grain size spectra are indicative of depth and cross-sectional variations, from die coastline to the central waters. Tidal variations, biological productivity and wind effects can be identified. Suspended particulate matter (SPM) components (determined using SEM, when combined with size spectra) illustrate hydrodynamical, geomorphological and biological effects on the composition of the...
Tipo: Text Palavras-chave: SUSPENDED MATTER; DIATOMS; DOVER STRAIT; ENGLISH CHANNEL.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00099/21073/18698.pdf
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