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| Fowler, Sw; Noshkin, Ve; La Rosa, J; Gastaud, J. |
| Vertical fluxes of Pu239+240 and Am-241 and temporal changes in their inventories in the northwestern Mediterranean Sea have been examined through high-resolution water column sampling coupled with direct measurements of the vertical flux of particle-bound transuranics using time-series sediment traps. Water column profiles of both radionuclides showed well-defined sub-surface maxima (Pu239+240 between 100-400 m; Am-241 at 100-200 m and 800 m), the depths of which are a result of the different biogeochemical scavenging behavior of the two radionuclides. Comparison of deep water column (0-2,000 m) transuranic inventories with those derived from earlier measurements demonstrate that the total Pu239+240 inventory had not substantially changed between... |
| Tipo: Text |
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| Ano: 2000 |
URL: https://archimer.ifremer.fr/doc/00220/33139/31637.pdf |
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| Fowler, Sw; Small, Lf; Larosa, J. |
| During a six-year (1978-1984) sediment trap study in the northwestern Mediterranean off the coast of Monaco, large variations in mass flux and carbon flux through 100 and 150 m were observed with maximum flux values occurring in late winter or early spring and minimum flux in late summer. Total particulate carbon flux was linearly related to mass flux. During March through October total particulate carbon flux represented, on average, approximately 7 % of the mass flux, whereas from November through February it averaged about 4.7 %. From recent organic carbon content data collected in the same region, it was estimated that approximately 5 % of the total mass flux through 100 and 150 m in calm seas was organic carbon (calm seas were prevalent during March... |
| Tipo: Text |
Palavras-chave: PARTICULATE CARBON FLUX; FECAL PELLETS; SEDIMENT TRAPS; SEASONAL PARTICLES FLUX. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00102/21281/18890.pdf |
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