Diagnosing Tibetan pollutant sources via volatile organic compound   observations

doi:10.1016/j.atmosenv.2017.07.031

CORC > 北京大学 > 环境科学与工程学院

	Diagnosing Tibetan pollutant sources via volatile organic compound observations
	Li, Hongyan ; He, Qiusheng ; Song, Qi ; Chen, Laiguo ; Song, Yongjia ; Wang, Yuhang ; Lin, Kui ; Xu, Zhencheng ; Shao, Min
刊名	ATMOSPHERIC ENVIRONMENT
	2017
关键词	Tibet Volatile organic compounds Tracers Sources Regional transport BLACK CARBON NONMETHANE HYDROCARBONS CENTRAL-HIMALAYAS EMISSION INVENTORY AIR-POLLUTION TRACE GASES RIVER DELTA AMBIENT AIR ICE CORE PLATEAU
DOI	10.1016/j.atmosenv.2017.07.031
英文摘要	Atmospheric transport of black carbon (BC) from surrounding areas has been shown to impact the Tibetan environment, and clarifying the geographical source and receptor regions is crucial for providing guidance for mitigation actions. In this study, 10 trace volatile organic compounds (VOCs) sampled across Tibet are chosen as proxies to diagnose source regions and related transport of pollutants to Tibet. The levels of these VOCs in Tibet are higher than those in the Arctic and Antarctic regions but much lower than those observed at many remote and background sites in Asia. The highest VOC level is observed in the eastern region, followed by the southern region and the northern region. A positive matrix factorization (PMF) model found that three factors-industry, biomass burning, and traffic-present different spatial distributions, which indicates that different zones of Tibet are influenced by different VOC sources. The average age of the air masses in the northern and eastern regions is estimated to be 3.5 and 2.8 days using the ratio of toluene to benzene, respectively, which indicates the foreign transport of VOC species to those regions. Back-trajectory analyses show that the Afghanistan-Pakistan-Tajikistan region, Indo-Gangetic Plain (IGP), and Meghalaya-Myanmar region could transport industrial VOCs to different zones of Tibet from west to east. The agricultural bases in northern India could transport biomass burning-related VOCs to the middle-northern and eastern zones of Tibet. High traffic along the unique national roads in Tibet is associated with emissions from local sources and neighboring areas. Our study proposes international joint-control efforts and targeted actions to mitigate the climatic changes and effects associated with VOCs in Tibet, which is a climate sensitive region and an important source of global water. (c) 2017 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [41501543, 41472311, 41273107]; Shanxi Province Science Foundation for Youths [2015021059]; Special Scientific Research Funds for Environmental Protection Commonwealth Section [20603020802L]; One-hundred Talent Program; Organization Department of Shanxi Province Committee; SCI(E); ARTICLE; 244-254; 166
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470630]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Li, Hongyan,He, Qiusheng,Song, Qi,et al. Diagnosing Tibetan pollutant sources via volatile organic compound observations[J]. ATMOSPHERIC ENVIRONMENT,2017.
APA	Li, Hongyan.,He, Qiusheng.,Song, Qi.,Chen, Laiguo.,Song, Yongjia.,...&Shao, Min.(2017).Diagnosing Tibetan pollutant sources via volatile organic compound observations.ATMOSPHERIC ENVIRONMENT.
MLA	Li, Hongyan,et al."Diagnosing Tibetan pollutant sources via volatile organic compound observations".ATMOSPHERIC ENVIRONMENT (2017).