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Atmospheric total gaseous mercury (TGM) concentrations and wet and dry deposition of mercury at a high-altitude mountain peak in south China
X. W. Fu;  X. Feng;  Z. Q. Dong;  R. S. Yin;  J. X. Wang;  Z. R. Yang;  H. Zhang
2009
Source PublicationAtmospheric Chemistry & Physics Discussions
Volume9Issue:6Pages:23465-23504
Abstract

China is regarded as the largest contributor of mercury (Hg) to the global atmospheric Hg budget. However, concentration levels and depositions of atmospheric Hg in China are poorly known. Continuous measurements of atmospheric gaseous elemental mercury (GEM) were carried out from May 2008 to May 2009 at the summit of Mt. Leigong in south China. Simultaneously, deposition fluxes of THg and MeHg in precipitation, throughfall and litterfall were also studied. Atmospheric GEM concentrations averaged 2.80±1.51 ng m−3 , which was highly elevated compared to global background values but much lower than semirural and industrial/urban areas in China. Sources identifi- cation indicates that both regional industrial emissions and long range transport of Hg from central, south and southwest China were corresponded to the elevated GEM level. Seasonal and diurnal variations of GEM were observed, which reflected variations in source intensity, deposition processes and meteorological factors. Precipitation and throughfall deposition fluxes of THg and MeHg in Mt. Leigong were comparable or lower compared to those reported in Europe and North America, whereas litterfall deposition fluxes of THg and MeHg were higher compared to Europe and North America. This highlights the importance of vegetation to Hg atmospheric cycling. In th remote forest ecosystem of China, deposition of GEM via uptake of foliage followed by litterfall was very important for the depletion of atmospheric Hg. Elevated GEM level in ambient air may accelerate the foliar uptake of Hg through air which may partly explain the elevated litterfall deposition fluxes of Hg observed in Mt. Leigong.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8145
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
2.Guizhou Environmental Science Research Institute, Guiyang 550002, China
3.Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
Recommended Citation
GB/T 7714
X. W. Fu;X. Feng;Z. Q. Dong;R. S. Yin;J. X. Wang;Z. R. Yang;H. Zhang. Atmospheric total gaseous mercury (TGM) concentrations and wet and dry deposition of mercury at a high-altitude mountain peak in south China[J]. Atmospheric Chemistry & Physics Discussions,2009,9(6):23465-23504.
APA X. W. Fu;X. Feng;Z. Q. Dong;R. S. Yin;J. X. Wang;Z. R. Yang;H. Zhang.(2009).Atmospheric total gaseous mercury (TGM) concentrations and wet and dry deposition of mercury at a high-altitude mountain peak in south China.Atmospheric Chemistry & Physics Discussions,9(6),23465-23504.
MLA X. W. Fu;X. Feng;Z. Q. Dong;R. S. Yin;J. X. Wang;Z. R. Yang;H. Zhang."Atmospheric total gaseous mercury (TGM) concentrations and wet and dry deposition of mercury at a high-altitude mountain peak in south China".Atmospheric Chemistry & Physics Discussions 9.6(2009):23465-23504.
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