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DOI	10.1016/j.scitotenv.2013.01.003
	Wet deposition of mercury at Lhasa, the capital city of Tibet
	Huang, Jie; Kang, Shichang; Wang, Shuxiao; Wang, Long; Zhang, Qianggong; Guo, Junming; Wang, Kang; Zhang, Guoshuai; Tripathee, Lekhendra
发表日期	2013
ISSN	0048-9697
EISSN	1879-1026
卷号	447
英文摘要	Quantifying the contribution of mercury (Hg) in wet deposition is important for understanding Hg biogeochemical cycling and anthropogenic sources, and verifying atmospheric models. Mercury in wet deposition was measured over the year 2010, in Lhasa the capital and largest city in Tibet. Precipitation samples were analyzed for total Hg (Hg-T), particulate-bound Hg (Hg-P), and reactive Hg (Hg-R). The volume-weighted mean (VWM) concentrations and wet deposition fluxes of Hg-T, Hg-P and Hg-R in precipitation were 24.8 ng L-1 and 82 mu g m(-2) yr(-1), 19.9 ng L-1 and 7.1 mu g m(-2) yr(-1), and 0.5 ng L-1 and 0.19 mu g m(-2) yr(-1), respectively. Concentrations of Hg-T and Hg-P were statistically higher during the non-monsoon season than during the monsoon season, while Hg-R concentrations were statistically higher during the monsoon season than during the non-monsoon season. Most Hg-T, Hg-P and Hg-R wet deposition occurred during the monsoon season. Concentrations of Hg-P and Hg-R were 77% and 5% of the Hg-T on average (VWM), respectively. Concentrations of Hg-T and HgP were weakly negatively correlated with precipitation amount (r(2) = 0.09 and 0.10; p<0.05), indicating that below-cloud scavenging of Hg from the local atmosphere was an important mechanism contributing Hg to precipitation. High Hg-P%, as well as a significant positive correlation between Hg-T and Hg, confirms that Hg wet deposition at Lhasa was primarily occurring in the form of atmospheric Hg-P below-cloud scavenging. Moreover, the Hg-T concentration, rather than the precipitation amount, was found to be the governing factor affecting Hg-T wet deposition flux. A comparison among modeled wet and dry deposition fluxes, and measurements suggested that estimates of both wet and dry Hg deposition fluxes by the GEOS-Chem model were 2 to 3 times higher than the measured annual wet flux. (C) 2013 Elsevier B.V. All rights reserved.
关键词	Mercury Precipitation Deposition GEOS-Chem model Lhasa Tibetan Plateau
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	SCIENCE OF THE TOTAL 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/111690
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Huang, Jie,Kang, Shichang,Wang, Shuxiao,et al. Wet deposition of mercury at Lhasa, the capital city of Tibet[J]. 中国科学院西北生态环境资源研究院,2013,447.
APA	Huang, Jie.,Kang, Shichang.,Wang, Shuxiao.,Wang, Long.,Zhang, Qianggong.,...&Tripathee, Lekhendra.(2013).Wet deposition of mercury at Lhasa, the capital city of Tibet.SCIENCE OF THE TOTAL ENVIRONMENT,447.
MLA	Huang, Jie,et al."Wet deposition of mercury at Lhasa, the capital city of Tibet".SCIENCE OF THE TOTAL ENVIRONMENT 447(2013).