气候变化领域集成服务门户(CCPortal): Perfluorinated alkyl substances in snow as an atmospheric tracer for tracking the interactions between westerly winds and the Indian Monsoon over western China

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DOI	10.1016/j.envint.2018.12.057
	Perfluorinated alkyl substances in snow as an atmospheric tracer for tracking the interactions between westerly winds and the Indian Monsoon over western China
	Wang, Xiaoping; Chen, Mengke; Gong, Ping; Wang, Chuanfei
通讯作者	Wang, XP (通讯作者)
发表日期	2019
ISSN	0160-4120
EISSN	1873-6750
起始页码	294
结束页码	301
卷号	124
英文摘要	Snow is an efficient scavenger for the deposition of contaminants. Atmospheric transport and snow deposition jointly control the distribution of pollutants in remote mountain/polar regions. But can the contaminants contained within snow be used to reflect the interactions of air circulation patterns? The physicochemical properties of perfluoroalkyl substances (PFASs) are unique because of their high water solubilities. Taking advantage of this, 15 surface-snow and 3 snow-pit samples were collected across a vast area of western China (spanning 20 degrees of latitude and 25 degrees of longitude), to investigate the concentrations, composition profiles (fingerprints), and deposition fluxes of PFASs. Both a high concentration (3974 pg/L) and deposition flux (4.0 mu g/m(2)/yr) for a total of 16 PFASs were found in the snow at Yulong, the most southern sample site, possibly because of its close proximity to source regions of pollutants in South Asia and high rate of snow deposition. Perfluorobutanoic acid was the most commonly found chemical in snow, but in general the PFAS composition in the snow of western China showed large spatial differences, with long-chain (C > 10) PFASs being relatively dominant in the north and west of the region and short-chain (C < 6) PFASs in the south and east. On the basis of the different compositions of PFASs in the snow of western China and the previously reported features of pollutant sources in Europe and India, we found that PFASs in snow can be used as an atmospheric tracer for tracking the interactions between westerly winds and the Indian Monsoon. The belt along 33 degrees N is a key location where both the Indian Monsoon and westerly winds can arrive/interact; however, the contribution of the monsoon was found to be above 70%, while that of the westerly winds can be lower than 30%. The western part of the 33 degrees N belt was found to be more vulnerable to the Indian Monsoon, and could be grouped into the monsoon domain, while the influence of the westerly winds increased from west to east along the belt. This finding is opposite to previous results, which reported that the western part of the 33 degrees N belt was mainly under the influence of the westerly winds, and for the first time quantifies the relative contribution of westerly winds and the Indian Monsoon to the atmospheric transport of chemicals.
关键词	PERSISTENT ORGANIC POLLUTANTS POLYCYCLIC AROMATIC-HYDROCARBONS PERFLUOROALKYL SUBSTANCES POLYFLUOROALKYL SUBSTANCES SPATIAL-DISTRIBUTION TIBETAN PLATEAU SURFACE RUNOFF NORTH PACIFIC CONTAMINATION TRANSPORT
英文关键词	Atmospheric tracer; Perfluorinated alkyl substances; Fingerprints
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000457122700029
来源期刊	ENVIRONMENT INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259425
推荐引用方式 GB/T 7714	Wang, Xiaoping,Chen, Mengke,Gong, Ping,et al. Perfluorinated alkyl substances in snow as an atmospheric tracer for tracking the interactions between westerly winds and the Indian Monsoon over western China[J]. 中国科学院青藏高原研究所,2019,124.
APA	Wang, Xiaoping,Chen, Mengke,Gong, Ping,&Wang, Chuanfei.(2019).Perfluorinated alkyl substances in snow as an atmospheric tracer for tracking the interactions between westerly winds and the Indian Monsoon over western China.ENVIRONMENT INTERNATIONAL,124.
MLA	Wang, Xiaoping,et al."Perfluorinated alkyl substances in snow as an atmospheric tracer for tracking the interactions between westerly winds and the Indian Monsoon over western China".ENVIRONMENT INTERNATIONAL 124(2019).