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DOI	10.1016/j.atmosenv.2012.06.006
	Geochemical evidence on the source regions of Tibetan Plateau dusts during non-monsoon period in 2008/09
	Li, Chaoliu; Kang, Shichang; Zhang, Qianggong; Gao, Shaopeng
发表日期	2012
ISSN	1352-2310
卷号	59
英文摘要	Geochemical characteristics, source regions and related transport patterns of dust over the Tibetan Plateau (TP) are still unclear. To address these issues, major (Na, Mg, Al, K and Ca), trace (e.g. Li, Cr, Ni, As, Cd, Cs, Pb and U) and rare earth elements of dust samples from five snow-pits over the TP and its fringe areas during the non-monsoon period in 2008/2009 were analyzed. The results indicate that rare earth element compositions of snow-pit dust are similar to those of the upper continental crust. Enrichment factors of all the elements of snow-pit dust are identical to those of the <20 mu m fraction of TP surface soils, especially for typical pollution elements (e.g. Cu and Ni) and elements like Li. As and Cs that are concentrated in surface soils. In contrast, concentrations of some typical pollution elements (e.g. Cr and Cd) of snow-pit dust are lower than those of dusts derived from the Sahara Desert and the That Desert surrounding the TP. Additionally, the compositions of rare earth elements and high field strength elements (Hf, Zr and Nb) of snow-pit dust are also similar to those of surface soils and different from dusts of these two deserts. The combined evidence, including dust transport patterns around the TP, supports the conclusion that the TP itself is the main source region of snow-pit dusts of the inner TP. It is unlikely that those particle-bound pollutants are transported into the TP from outside sources during the non-monsoon period. (C) 2012 Elsevier Ltd. All rights reserved.
关键词	Snow-pit Dust transportation Geochemical composition
学科领域	Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
来源期刊	ATMOSPHERIC ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111647
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,et al. Geochemical evidence on the source regions of Tibetan Plateau dusts during non-monsoon period in 2008/09[J]. 中国科学院西北生态环境资源研究院,2012,59.
APA	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,&Gao, Shaopeng.(2012).Geochemical evidence on the source regions of Tibetan Plateau dusts during non-monsoon period in 2008/09.ATMOSPHERIC ENVIRONMENT,59.
MLA	Li, Chaoliu,et al."Geochemical evidence on the source regions of Tibetan Plateau dusts during non-monsoon period in 2008/09".ATMOSPHERIC ENVIRONMENT 59(2012).