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Deposition at Dome Fuji, Antarctica since the 1950s

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Title
Deposition at Dome Fuji, Antarctica since the 1950s
Other Titles
1950 년 이후 남극 돔 후지 지역에서의 대기 백금족원소 침전 변화 연구
Authors
Tseren-Ochir, Soyol-Erdene
Huh, Youngsook
Kotaro Fukui
Hideaki Motoyama
Hur, Soon Do
Hong, Sungmin
Keywords
Dome Fuji; Iridium; Platinum; Rhodium; flux
Issue Date
2012
Citation
Tseren-Ochir, Soyol-Erdene, et al. 2012. Deposition at Dome Fuji, Antarctica since the 1950s. International Polar Year. International Polar Year. 2012.04.25~.
Abstract
Worldwide production of PGEs has been rising steadily over the past few decades because of the increased use of these metals, such as in catalysts, jewelry, and electronics. Here, we present the first time series for PGE (Pt, Ir, and Rh) deposition in Antarctica and determined the changes in the global background atmospheric level over a recent 50-year period based on determinations of Pt, Ir, and Rh in snow samples collected from Queen Maud Land, East Antarctica. 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.) deposition in Antarctica and determined the changes in the global background atmospheric level over a recent 50-year period based on determinations of Pt, Ir, and Rh in snow samples collected from Queen Maud Land, East Antarctica. 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 volcan
URI
http://repository.kopri.re.kr/handle/201206/8402
Conference Name
International Polar Year
Conference Place
International Polar Year
Conference Date
2012.04.25~
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