气候变化领域集成服务门户(CCPortal): Characteristics of atmospheric mercury in a suburban area of east China: Sources; formation mechanisms; and regional transport

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DOI	10.5194/acp-19-5923-2019
	Characteristics of atmospheric mercury in a suburban area of east China: Sources; formation mechanisms; and regional transport
	Qin X.; Wang X.; Shi Y.; Yu G.; Zhao N.; Lin Y.; Fu Q.; Wang D.; Xie Z.; Deng C.; Huang K.
发表日期	2019
ISSN	16807316
起始页码	5923
结束页码	5940
卷号	19 期号:9
英文摘要	Speciated atmospheric mercury including gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM) were measured continuously for a 1-year period at a suburban site, representing a regional transport intersection zone, in east China. Annual mean concentrations of GEM, PBM, and GOM reached 2.77 ngm3, 60.8 pgm3, and 82.1 pgm3, respectively. GEM concentrations were elevated in all the seasons except autumn. High mercury concentrations were related to winds from the south, southwest, and north of the measurement site. Combining analysis results from using various source apportionment methods, it was found that GEM concentration was higher when quasi-local sources dominated over long-range transport. Six source factors belonging to the anthropogenic sources of GEM were identified, including the common sectors previously identified (industrial and biomass burning, coal combustion, iron and steel production, cement production, and incineration), as well as an additional factor of shipping emissions (accounting for 19.5% of the total), which was found to be important in east China where marine vessel shipping activities are intense. Emissions of GEM from natural surfaces were also found to be as important as those from anthropogenic sources for GEM observed at this site. Concurrences of high GOM concentrations with elevated O3 and temperature, along with the lagged variations in GEM and GOM during daytime demonstrated that the very high GOM concentrations were partially ascribed to intense in situ oxidation of GEM. Strong gas particle partitioning was also identified when PM2:5 was above a threshold value, in which case GOM decreased with increasing PM2:5. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	annual variation; atmospheric transport; concentration (composition); formation mechanism; mercury (element); source apportionment; suburban area; China
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144438
作者单位	Center for Atmospheric Chemistry Study, Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; Shanghai Environmental Monitoring Center, Shanghai, 200030, China; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China; Institute of Eco-Chongming (IEC), No. 20 Cuiniao Road, Chen Jiazhen, Shanghai, 202162, China
推荐引用方式 GB/T 7714	Qin X.,Wang X.,Shi Y.,et al. Characteristics of atmospheric mercury in a suburban area of east China: Sources; formation mechanisms; and regional transport[J],2019,19(9).
APA	Qin X..,Wang X..,Shi Y..,Yu G..,Zhao N..,...&Huang K..(2019).Characteristics of atmospheric mercury in a suburban area of east China: Sources; formation mechanisms; and regional transport.Atmospheric Chemistry and Physics,19(9).
MLA	Qin X.,et al."Characteristics of atmospheric mercury in a suburban area of east China: Sources; formation mechanisms; and regional transport".Atmospheric Chemistry and Physics 19.9(2019).