2016年6月
Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica
GEOPHYSICAL RESEARCH LETTERS
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- 巻
- 43
- 号
- 11
- 開始ページ
- 5878
- 終了ページ
- 5885
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/2016GL069482
- 出版者・発行元
- AMER GEOPHYSICAL UNION
The sulfur stable isotopic values (S-34) of sulfate aerosols can be used to assess oxidation pathways and contributions from various sources, such as marine biogenic sulfur, volcanoes, and sea salt. However, because of a lack of observations, the spatial distribution of S-34 values in Antarctic sulfate aerosols remains unclear. Here we present the first sulfur isotopic values from surface snow samples along a latitudinal transect in eastern Dronning Maud Land, East Antarctica. The S-34 values of sulfate showed remarkably uniform values, in the range of 14.8-16.9, and no significant decrease toward the inland part of the transect was noted. These results suggest that net isotopic fractionation during long-range transport is insignificant. Thus, the S-34 values can be used to infer source contributions. The S-34 values suggest that marine biogenic sulfur is the dominant source of sulfate aerosols, with a fractional contribution of 8416%.
- リンク情報
- ID情報
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- DOI : 10.1002/2016GL069482
- ISSN : 0094-8276
- eISSN : 1944-8007
- ORCIDのPut Code : 25797986
- Web of Science ID : WOS:000379851800040