气候变化领域集成服务门户(CCPortal): Lead isotopic composition of insoluble particles from widespread mountain glaciers in western China: Natural vs. anthropogenic sources

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DOI	10.1016/j.atmosenv.2013.04.018
	Lead isotopic composition of insoluble particles from widespread mountain glaciers in western China: Natural vs. anthropogenic sources
	Yu, Guangming; Xu, Jianzhong; Kang, Shichang; Zhang, Qianggong; Huang, Jie; Ren, Qian; Ren, Jiawen; Qin, Dahe
发表日期	2013
ISSN	1352-2310
EISSN	1873-2844
卷号	75
英文摘要	Stable lead (Pb) isotopic fingerprints provide opportunities to trace natural and anthropogenic Pb sources in the environment. In order to evaluate Pb deposition from different sources over mountainous areas of western China, Pb isotopic compositions were characterized from modern aeolian dust in 15 snowpit samples collected from 13 typical mountain glaciers between 2008 and 2010. Most of the snowpits sampled cover more than a whole year of accumulation and overlap with each other on deposition date. Pb isotopic variability among all the samples is small, varying in the range of 18.1399-18.9199 for Pb-206/Pb-204, 15.5979-15.8743 for Pb-207/Pb-204, 38.2272-39.9453 for Pb-208/Pb-204, 1.1605-1.2009 for Pb-206/Pb-207 and 2.4433-2.5182 for Pb-208/Pb-207. Three isotopic plots of the different Pb isotope ratios (Pb-207/Pb-204 vs. Pb-206/Pb-204, Pb-208/Pb-204 vs. Pb-206/Pb-204, and Pb-208/Pb-207 vs. Pb-206/Pb-207) in all the samples show identical geographic trends, with more radiogenic in the south and less in the north. This trend is consistent with the distribution of natural dust sources and supports the interpretation of a regional/local source for insoluble particles (IP) to snow/glaciers in this region. Comparison with the Pb isotope results from potential dust sources, however, it shows that the Pb isotopic compositions of IP samples in snow samples are relatively less radiogenic. Parts of these less-radiogenic Pb isotopes are comparable with the ice core results during recent decades, which are shown to be influenced by anthropogenic sources. At sites located along the periphery of western China, the Pb isotopic compositions are much closer to anthropogenic results. Natural and anthropogenic Pb sources are roughly assessed using a simple binary model. The sites with a high anthropogenic fraction are at lower elevations and are relatively close to population centers. (C) 2013 Elsevier Ltd. All rights reserved.
关键词	Stable lead isotopes Insoluble particles Snowpit Qinghai-Xizang (Tibet) Plateau Western China
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/111680
作者单位	Chinese Acad Sci, State Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yu, Guangming,Xu, Jianzhong,Kang, Shichang,et al. Lead isotopic composition of insoluble particles from widespread mountain glaciers in western China: Natural vs. anthropogenic sources[J]. 中国科学院西北生态环境资源研究院,2013,75.
APA	Yu, Guangming.,Xu, Jianzhong.,Kang, Shichang.,Zhang, Qianggong.,Huang, Jie.,...&Qin, Dahe.(2013).Lead isotopic composition of insoluble particles from widespread mountain glaciers in western China: Natural vs. anthropogenic sources.ATMOSPHERIC ENVIRONMENT,75.
MLA	Yu, Guangming,et al."Lead isotopic composition of insoluble particles from widespread mountain glaciers in western China: Natural vs. anthropogenic sources".ATMOSPHERIC ENVIRONMENT 75(2013).