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Biogeochemical markers of organic matter along the Wight-Cherbourg transect (central English Channel) ArchiMer
Ismaili, Mm; Serve, L; Gadel, F; Lafite, R; Texier, H.
Three cruises on the Wight-Cherbourg transect were undertaken during the FluxManche II Programme in order to study the origin, nature and behaviour of organic matter inputs to the waters of the English Channel. Suspended particulate material (SPM) collected from surface and deep waters at each station was analysed at elemental level for Particulate Organic Carbon and Particulate Organic Nitrogen (POC, PON), at molecular level for main classes of organic compounds using Pyrolysis-Gas Chromatography coupled with Mass Spectrometry (Py-GC-MS) and for phenolic compounds, particularly lignin-derived phenols, using High Performance Liquid Chromatography (HPLC). The SPM content increases from the French (south) to the English coast (north) with the lowest values...
Tipo: Text Palavras-chave: Matière particulaire en suspension; Composés organiques; Marqueurs phénoliques; Biogéochimie; Manche; Suspended particulate matter; Organic compounds; Phenolic markers; Biogeochemistry; English Channel.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43603/43922.pdf
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Distribution et caractérisation par fluorescence de la matière organique dissoute dans les eaux de la Manche centrale ArchiMer
Ismaili, Mm; Belin, Colette; Lamotte, M; Texier, H.
Intensity and spectral characteristics of the fluorescence of water samples collected along the transect Cherbourg-Isle of Wight during four cruises for excitations at 370, 313 and 270 nm have been investigated within the framework of the FluxManche II program. Seasonal and spatial differences appeared to reflect on the one hand, variations in terrestrial inputs, and on the other hand, waters masses structuring. The observed linear variation of the fluorescence intensity with salinity indicates a gradual dilution of the continental humic material in going from the coasts to the central part of the English Channel. The largest signal was observed for the English coastal waters in agreement with important terrestrial inputs from the Solent river. While the...
Tipo: Text Palavras-chave: Spectrofluorimétrie; Matière organique dissoute; Manche; Traceur de masse d'eau; Nutriment; Spectrofluorimetry; Dissolved organic matter; English Channel; Tracer of water mass; Nutrient.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00325/43649/43243.pdf
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