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DOI	10.5194/acp-21-6721-2021
	Isotopic compositions of atmospheric total gaseous mercury in 10 Chinese cities and implications for land surface emissions
	Fu X.; Liu C.; Zhang H.; Xu Y.; Zhang H.; Li J.; Lyu X.; Zhang G.; Guo H.; Wang X.; Zhang L.; Feng X.
发表日期	2021
ISSN	1680-7316
起始页码	6721
结束页码	6734
卷号	21 期号:9
英文摘要	Land surface emissions are an important source of atmospheric total gaseous mercury (TGM); however, its role on the variations of TGM isotopic compositions and concentrations has not been properly evaluated. In this study, TGM isotope compositions, a powerful tracer for sources and transformation of Hg, were measured at 10 urban sites and one rural site in China. TGM concentrations were higher in summer than in winter in most cities except in Guiyang and Guangzhou in the low latitudes. The summertime high TGM concentrations coincided with prevailing low TGM delta202Hg and high TGM Δ199Hg signatures. These seasonal patterns were in contrast with those typically observed in rural areas in the Northern Hemisphere, suggesting that atmospheric oxidation chemistry, vegetation activity and residential coal combustion were likely not the dominant mechanisms contributing to the TGM concentration and isotopic composition seasonality in Chinese cities. The amplitudes of seasonal variations in TGM concentrations and Δ199Hg (or TGM delta202Hg) were significantly positively (or negatively) correlated with that of the simulated soil GEM emission flux. These results suggest that the seasonal variations in TGM isotopic compositions and concentrations in the 10 Chinese cities were likely controlled by land surface emissions that were observed or reported with highly negative delta202Hg signatures. © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	atmospheric chemistry; concentration (composition); emission; isotopic composition; land surface; mercury (element); seasonal variation; urban atmosphere; 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/246926
作者单位	State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong SAR, China; Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Fu X.,Liu C.,Zhang H.,et al. Isotopic compositions of atmospheric total gaseous mercury in 10 Chinese cities and implications for land surface emissions[J],2021,21(9).
APA	Fu X..,Liu C..,Zhang H..,Xu Y..,Zhang H..,...&Feng X..(2021).Isotopic compositions of atmospheric total gaseous mercury in 10 Chinese cities and implications for land surface emissions.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Fu X.,et al."Isotopic compositions of atmospheric total gaseous mercury in 10 Chinese cities and implications for land surface emissions".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).