Wet deposition of mercury at Lhasa, the capital city of Tibet (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Wet deposition of mercury at Lhasa, the capital city of Tibet (SCI)
	Huang J. ; Kang S. C. ; Wang S. X. ; Wang L. ; Zhang Q. G. ; Guo J. M. ; Wang K. ; Zhang G. S. ; Tripathee L.
刊名	Science of the Total Environment
	2013
卷号	447 页码:123-132
ISSN号	ISBN/0048-9697
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
收录类别	(SCI)
语种	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.
公开日期	2014-12-19
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/23113]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Huang J.,Kang S. C.,Wang S. X.,et al. Wet deposition of mercury at Lhasa, the capital city of Tibet (SCI)[J]. Science of the Total Environment,2013,447:123-132.
APA	Huang J..,Kang S. C..,Wang S. X..,Wang L..,Zhang Q. G..,...&Tripathee L..(2013).Wet deposition of mercury at Lhasa, the capital city of Tibet (SCI).Science of the Total Environment,447,123-132.
MLA	Huang J.,et al."Wet deposition of mercury at Lhasa, the capital city of Tibet (SCI)".Science of the Total Environment 447(2013):123-132.