Multi-year monitoring of atmospheric total gaseous mercury at a remote high-altitude site (Nam Co, 4730 m a.s.l.) in the inland Tibetan Plateau region

doi:10.5194/acp-18-10557-2018

	Multi-year monitoring of atmospheric total gaseous mercury at a remote high-altitude site (Nam Co, 4730 m a.s.l.) in the inland Tibetan Plateau region
	de Foy, B (de Foy, Benjamin)4; Ma, YM (Ma, Yaoming)2,5; Tong, YD (Tong, Yindong)6; Zhang, W (Zhang, Wei)7; Wang, XJ (Wang, Xuejun)8; Zhang, GS (Zhang, Guoshuai)2; Zhang, QG (Zhang, Qianggong)2,5; Yin, XF (Yin, Xiufeng)1,2,3,4; Kang, SC (Kang, Shichang)1,5
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2018-07-24
卷号	18 期号:14 页码:10557-10574
关键词	ASIAN SUMMER MONSOON LONG-TERM TRENDS ELEMENTAL MERCURY WET DEPOSITION BLACK CARBON SPECIATED MERCURY REACTIVE MERCURY TEMPORAL TREND MT. CHANGBAI MACE-HEAD
ISSN号	1680-7316
DOI	10.5194/acp-18-10557-2018
英文摘要	Total gaseous mercury (TGM) concentrations were continuously measured at Nam Co Station, a remote high-altitude site (4730 m a.s.l.),on the inland Tibetan Plateau, China, from January 2012 to October 2014 using a Tekran 2537B instrument. The mean concentration of TGM during the entire monitoring period was 1 : 33 +/- 0 : 24 ng m(-3) (mean +/- standard deviation), ranking it as the lowest value among all continuous TGM measurements reported in China; it was also lower than most of sites in the Northern Hemisphere. This indicated the pristine atmospheric environment on the inland Tibetan Plateau. Longterm TGM at the Nam Co Station exhibited a slight decrease especially for summer seasons. The seasonal variation of TGM was characterized by higher concentrations during warm seasons and lower concentrations during cold seasons, decreasing in the following order: summer (1.50 +/- 0.20 ng m(-3)) > spring (1.28 +/- 0.20 ng m(-3)) > autumn (1.22 +/- 0.17 ng m(-3)) > winter (1.14 +/- 0.18 ng m(-3)). Diurnal variations of TGM exhibited uniform patterns in different seasons: the daily maximum was reached in the morning (around 2-4 h after sunrise), followed by a decrease until sunset and a subsequent buildup at night, especially in the summer and the spring. Regional surface reemission and vertical mixing were two major contributors to the temporal variations of TGM while long-range transported atmospheric mercury promoted elevated TGM during warm seasons. Results of multiple linear regression (MLR) revealed that humidity and temperature were the principal covariates of TGM. Potential source contribution function (PSCF) and FLEXible PARTicle dispersion model (WRF-FLEXPART) results indicated that the likely high potential source regions of TGM to Nam Co were central and eastern areas of the Indo-Gangetic Plain (IGP) during the measurement period with high biomass burning and anthropogenic emissions. The seasonality of TGM at Nam Co was in phase with the Indian monsoon index, implying the Indian summer monsoon as an important driver for the transboundary transport of air pollution onto the inland Tibetan Plateau. Our results provided an atmospheric mercury baseline on the remote inland Tibetan Plateau and serve as new constraint for the assessment of Asian mercury emission and pollution.
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000439635700002
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8593]
专题	青藏高原研究所_图书馆
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China; 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100039, Peoples R China; 4.St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63108 USA; 5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 6.Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China; 7.Renmin Univ China, Sch Environm & Nat Resources, Beijing 100872, Peoples R China; 8.Peking Univ, Coll Urban & Environm Sci, Beijing 100871, Peoples R China.
推荐引用方式 GB/T 7714	de Foy, B ,Ma, YM ,Tong, YD ,et al. Multi-year monitoring of atmospheric total gaseous mercury at a remote high-altitude site (Nam Co, 4730 m a.s.l.) in the inland Tibetan Plateau region[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS ,2018,18(14):10557-10574.
APA	de Foy, B .,Ma, YM .,Tong, YD .,Zhang, W .,Wang, XJ .,...&Kang, SC .(2018).Multi-year monitoring of atmospheric total gaseous mercury at a remote high-altitude site (Nam Co, 4730 m a.s.l.) in the inland Tibetan Plateau region.ATMOSPHERIC CHEMISTRY AND PHYSICS ,18(14),10557-10574.
MLA	de Foy, B ,et al."Multi-year monitoring of atmospheric total gaseous mercury at a remote high-altitude site (Nam Co, 4730 m a.s.l.) in the inland Tibetan Plateau region".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.14(2018):10557-10574.