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Changes in the Atmospheric Fluxes of Arsenic, Antimony, Thallium, and Bismuth to the Antarctic Snow during the Past 50 Years

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Title
Changes in the Atmospheric Fluxes of Arsenic, Antimony, Thallium, and Bismuth to the Antarctic Snow during the Past 50 Years
Other Titles
남극 눈시료에서의 지난 50년간의 As, Sb, Tl, Bi의 조성 변화연구
Authors
Soyol-Erdene
Hur, Soon Do
Huh, Youngsook
Hong, Sungmin
H.Motoyama
Hong, Sang-Bum
Hwang, Heejin
Keywords
Dome Fuji; East Antarctica; Toxic elements; snow pit; volcanic contribution
Issue Date
2010
Citation
Soyol-Erdene, et al. 2010. Changes in the Atmospheric Fluxes of Arsenic, Antimony, Thallium, and Bismuth to the Antarctic Snow during the Past 50 Years. ICHMET. ICHMET. 2010.09.19~.
Abstract
Arsenic, Sb, Tl and Bi are highly toxic elements and found in trace amounts in the earth’s crust. Various investigations documented that the atmospheric load and geochemical cycles of these rare elements in the Northern Hemisphere where industrial activities are intensive, have been controlled by changing emissions from various natural and industrial processes in modern times. In order to understand the atmospheric behavior of As, Sb, Tl, and Bi in the most remote areas in the Southern Hemisphere, we have determined these elements in a continuous series of 80 snow samples from a 4-m snow pit, covering 50 years from 1957 to 2007, at Dome Fuji in East Antarctica. They were measured by ultrasensitive inductively coupled sector field mass spectrometry (ICP-SFMS) under a Class 10 ultraclean condition. Concentrations of As, Sb, Tl, and Bi are extremely low, with mean values of 11.3 pg g-1 for As, 0.29 pg g-1 for Sb, 0.07 pg g-1 for Tl, and 0.12 pg g-1 for Bi, respectively. Our snow profiles show that a large fraction of Sb, Tl, and Bi can be attributed to anthropogenic sources, while more than a half of the total Tl originated from natural sources, especially from volcanic emissions including the Mt. Erebus volcano plume in East Antarctica. Our data suggest that Tl is a unique signature for identifying volcanic aerosol from both quiescently degassing and eruptive volcanoes.
URI
http://repository.kopri.re.kr/handle/201206/8061
Conference Name
ICHMET
Conference Place
ICHMET
Conference Date
2010.09.19~
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