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Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China
Hui Zhang;  Xuewu Fu;  Che-Jen Lin;  Lihai Shang;  Yiping Zhang;  Xinbin Feng;  Cynthia Lin
2016
Source PublicationAtmospheric Chemistry & Physics
Pages13131–13148
Abstract

To better understand the influence of monsoonal climate and transport of atmospheric mercury (Hg) in southwestern China, measurements of total gaseous mercury (TGM, defined as the sum of gaseous elemental mercury, GEM, and gaseous oxidized mercury, GOM), particulate bound mercury (PBM) and GOM were carried out at Ailaoshan Station (ALS, 2450 m a.s.l.) in southwestern China from May 2011 to May 2012. The mean concentrations (± standard deviation) for TGM, GOM and PBM were 2.09 ± 0.63 ng m−3, 2.2 ± 2.3 pg m−3 and 31.3 ± 28.4 pg m−3, respectively. TGM showed a monsoonal distribution pattern with relatively higher concentrations (p = 0.021) during the Indian summer monsoon (ISM, from May to September) and the East Asia summer monsoon (EASM, from May to September) periods than that in the non-ISM period. Similarly, GOM and PBM concentrations were higher in the ISM period than in the non-ISM period. This study suggests that the ISM and the EASM have a strong impact on long-range and transboundary transport of Hg between southwestern China and South and Southeast Asia. Several high TGM events were accompanied by the occurrence of northern wind during the ISM period, indicating anthropogenic Hg emissions from inland China could rapidly increase TGM levels at ALS due to strengthening of the EASM. Most of the TGM and PBM events occurred at ALS during the non-ISM period. Meanwhile, high CO concentrations were also observed at ALS, indicating that a strong south tributary of westerlies could have transported Hg from South and Southeast Asia to southwestern China during the non-ISM period. Consequently, southwestern China is an important anthropogenic source region of ALS during the ISM period. The biomass burning in Southeast Asia and anthropogenic Hg emissions from South Asia should be the source of atmospheric Hg in remote areas of southwestern China during the non-ISM period.

KeywordAtmospheric Mercury Indian Summer Monsoon Transboundary Transport Southwestern China Southeast Asia
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8419
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, PR China
2.enter for Advances in Water and Air Quality,Lamar University, Beaumont, Texas 77710, United States
3.Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China
4.The McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
Recommended Citation
GB/T 7714
Hui Zhang;Xuewu Fu;Che-Jen Lin;Lihai Shang;Yiping Zhang;Xinbin Feng;Cynthia Lin. Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China[J]. Atmospheric Chemistry & Physics,2016:13131–13148.
APA Hui Zhang;Xuewu Fu;Che-Jen Lin;Lihai Shang;Yiping Zhang;Xinbin Feng;Cynthia Lin.(2016).Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China.Atmospheric Chemistry & Physics,13131–13148.
MLA Hui Zhang;Xuewu Fu;Che-Jen Lin;Lihai Shang;Yiping Zhang;Xinbin Feng;Cynthia Lin."Monsoon-facilitated characteristics and transport of atmospheric mercury at a high-altitude background site in southwestern China".Atmospheric Chemistry & Physics (2016):13131–13148.
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