气候变化领域集成服务门户(CCPortal): 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

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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
	Yin, Xiufeng; Kang, Shichang; de Foy, Benjamin; Ma, Yaoming; Tong, Yindong; Zhang, Wei; Wang, Xuejun; Zhang, Guoshuai; Zhang, Qianggong
通讯作者	Kang, SC (通讯作者)
发表日期	2018
ISSN	1680-7316
EISSN	1680-7324
起始页码	10557
结束页码	10574
卷号	18 期号:14
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.
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
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000439635700002
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
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/259334
推荐引用方式 GB/T 7714	Yin, Xiufeng,Kang, Shichang,de Foy, Benjamin,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]. 中国科学院青藏高原研究所,2018,18(14).
APA	Yin, Xiufeng.,Kang, Shichang.,de Foy, Benjamin.,Ma, Yaoming.,Tong, Yindong.,...&Zhang, Qianggong.(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).
MLA	Yin, Xiufeng,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).