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| James, Rh; Statham, Pj; Morley, Nh; Burton, Jd. |
| Water column samples have been collected at six stations across the Dover Strait within the framework of the FluxManche programme every month for fifteen months and analyzed for particulate and dissolved trace metals. Important seasonal variations in trace metal distributions have been identified. Dissolved Cu and Ni exhibit similar behaviour in the Strait; while seasonal variation in their distribution may be determined by changes in freshwater input, additional processes including biological uptake and regeneration and benthic input probably perturb water column inventories. Consistently with the suggestion of other authors, Co and Mn in both the dissolved and particulate phase exhibit some degree of covariance; substantial increases in the concentration... |
| Tipo: Text |
Palavras-chave: FLUXMANCHE; TRACE METALS; GEOCHEMISTRY; SHELF SEAS; TEMPORAL VARIATION. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21077/18702.pdf |
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| Statham, Pj; Auger, Y; Burton, Jd; Choisy, P; Fischer, Jc; James, Rh; Morley, Nh; Ouddane, B; Puskaric, E; Wartel, M. |
| Measurements of dissolved and particulate Cd, Co, Cu, Fe, Mn, Ni, Pb and Zn have been made on a regular basis over a fifteen month period at stations across the Strait of Dover, as a part of the Fluxmanche programme. These measurements have been integrated with data on fluxes of water and suspended particulate matter also obtained within the Fluxmanche programme to provide estimates of fluxes of these elements into the southern North Sea. For Fe, Mn, and Pb, particulate fluxes are greater than dissolved fluxes, whilst the reverse is true for Cd, Cu and Ni. Significant daily changes in magnitude of the modelled fluxes of water through the Strait when combined with averaged metal concentrations over longer timescales, result in large changes of fluxes of... |
| Tipo: Text |
Palavras-chave: DISSOLVED TRACE METALS; PARTICULATE TRACE METALS; SEAWATER; FLUXES; STRAIT OF DOVER. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21076/18701.pdf |
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| Bentley, D; Lafite, R; Morley, Nh; James, R; Statham, Pj; Guary, Jc. |
| As part of the MAST I-FluxManche initiative, a monthly (September 1990 to November 1991) sampling programme has been carried out in the Dover Strait. Samples were taken (weather permitting) at two depths at each of six standard stations between Folkestone and Cap Gris-Nez. Data from all surveys, in conjunction with estimates of water movement derived from hydrodynamic numerical model, have been used to calculate fluxes of nutrients between the Channel and the North Sea. Results demonstrate that although nutrient concentrations are lower in the central channel-waters than in the coastal zone, the dissolved nutrient flux to the North Sea is mom important for stations of the central part of the Dover Strait as water. Current concern about possible increases... |
| Tipo: Text |
Palavras-chave: NUTRIENTS; FLUXES; DOVER STRAIT. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00100/21124/18744.pdf |
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| Muller, Fll; Tappin, Ad; Statham, Pj; Burton, Jd; Hydes, Dj. |
| Two transects across the Celtic Sea and adjacent continental slope in August 1985 and August 1988 illustrate the importance of dynamic physical processes on dissolved trace metal distributions (Cd, Ni, Cu, Pb, Co, Fe, Mn). The influence of a coastal frontal zone can be seen in the 1985 transect, while an intrusion of open ocean waters into the shelf environment is the main factor influencing the horizontal distribution of trace metals in 1988. A third transect across the continental slope bordering the Porcupine Seabight (May 1984) reveals marked horizontal fronts in the concentrations of Fe, Mn and Cu at the shelf edge (over a 21 km distance, concentrations fall from 3 to 1 nM for Fe, from 2 to 0.5 nM for Mn, from 2 to 1 nM for Cu) which are unaccompanied... |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00098/20899/18512.pdf |
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