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A comparison of dissolved and particulate mn and al distributions in the western north-atlantic ArchiMer
Yeats, Pa; Dalziel, Ja; Moran, Sb.
The dissolved Mn distribution on an oceanographic section along 50-degrees-W in the western North Atlantic shows decreasing concentrations in the offshore direction in the surface layer and with depth at the deep water stations. Leachable particulate Mn concentrations are low in the open ocean surface waters and elevated at intermediate depths. Dissolved Al concentrations in the surface layer are higher in the open ocean than on the shelf and the vertical distributions are characterized by surface maxima, a subsurface minimum at almost-equal-to 1 000 m and increasing concentrations in the deep waters. Leachable particulate Al concentrations are elevated on the shelf and in open ocean surface waters compared to the intermediate and deep waters. The Deep...
Tipo: Text Palavras-chave: ALUMINUM; MANGANESE; NORTH ATLANTIC OCEAN; REMOVAL MECHANISMS; MANGANESE OXIDATION.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00101/21186/18803.pdf
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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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