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- W2316736039 abstract "Antarctic snow preserves an atmospheric archive that enables the study of global atmospheric changes and anthropogenic disturbances from the past. We report atmospheric deposition rates of platinum group elements (PGEs) in Antarctica during the last ∼50 years based on determinations of Pt, Ir, and Rh in snow samples collected from Queen Maud Land, East Antarctica to evaluate changes in the global atmospheric budget of these noble metals. The 50-year average PGE concentrations in Antarctic snow were 17 fg g–1 (4.7–76 fg g–1) for Pt, 0.12 fg g–1 (<0.05–0.34 fg g–1) for Ir, and 0.71 fg g–1 (0.12–8.8 fg g–1) for Rh. The concentration peaks for Pt, Ir, and Rh were observed at depths corresponding to volcanic eruption periods, indicating that PGEs can be used as a good tracer of volcanic activity in the past. A significant increase in concentrations and crustal enrichment factors for Pt and a slight enhancement in enrichment factors for Rh were observed after the 1980s. This suggests that there has been large-scale atmospheric pollution for Pt and probably for Rh since the 1980s, which may be attributed to the increasing emissions of these metals from anthropogenic sources such as automobile catalysts and metal production processes." @default.
- W2316736039 created "2016-06-24" @default.
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- W2316736039 date "2011-06-21" @default.
- W2316736039 modified "2023-09-25" @default.
- W2316736039 title "A 50-Year Record of Platinum, Iridium, and Rhodium in Antarctic Snow: Volcanic and Anthropogenic Sources" @default.
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- W2316736039 doi "https://doi.org/10.1021/es2005732" @default.
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