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- W2082661476 abstract "Fluxes of biogenic components were determined using time-series sediment trap samples collected at site B (74°01.50′S, 175°05.55′E) in the northern Joides Basin of the Ross Sea from December 1994 to January 1996. In most cases, a great part of the material collected by traps (200 and 540 m depth) was biogenic, opal being the most abundant constituent followed by organic matter. The composition of particles shows a seasonal pattern in the upper trap, which is much less evident at depth. Fluxes showed a marked seasonality due to the presence, in winter, of ice cover. During the sampling period, mass fluxes varied from 0.03 to 120 mg m−2 day−1 and from 24 to 393 mg m−2 day−1 at the upper and bottom level, respectively. Values of 0–64 mg m−2 day−1 of biogenic silica and 0–7.8 mg m−2 day−1 of organic carbon were obtained at 200 m depth. Near-bottom fluxes were almost always much higher: 11–141 and 1.5–19 mg m−2 day−1, respectively. 210Pb fluxes are lower than expected, and this means that particles sink rapidly without reaching an equilibrium with the radiotracer. A mechanism of focusing affects the bottom trap and much more, the seafloor. At site B, we measured particle fluxes that are much lower than those obtained at other locations in the Ross Sea. This can be due to low production and export during the sampling period, and underlies the necessity to further investigate the interannual variability of these processes." @default.
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- W2082661476 date "2000-12-01" @default.
- W2082661476 modified "2023-10-11" @default.
- W2082661476 title "Particle fluxes and biogeochemical processes in an area influenced by seasonal retreat of the ice margin (northwestern Ross Sea, Antarctica)" @default.
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- W2082661476 doi "https://doi.org/10.1016/s0924-7963(00)00069-5" @default.
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