Environmental Science and Pollution Research

, Volume 23, Issue 21, pp 21631–21640 | Cite as

Monsoon-driven transport of atmospheric mercury to the South China Sea from the Chinese mainland and Southeast Asia—Observation of gaseous elemental mercury at a background station in South China

  • Ming Liu
  • Laiguo ChenEmail author
  • Donghai XieEmail author
  • Jiaren Sun
  • Qiusheng He
  • Limei Cai
  • Zhiqiang Gao
  • Yiqiang Zhang
Research Article


Concentrations of gaseous elemental mercury (GEM) were continuously monitored from May 2011 to May 2012 at the Wuzhishan State Atmosphere Background Monitoring Station (109°29′30.2″ E, 18°50′11.0″ N) located in Hainan Island. This station is an ideal site for monitoring long-range transport of atmospheric pollutants from mainland China and Southeast Asia to South China Sea. Annual average GEM concentration was 1.58 ± 0.71 ng m−3 during the monitoring period, which was close to background values in the Northern Hemisphere. GEM concentrations showed a clear seasonal variation with relatively higher levels in autumn (1.86 ± 0.55 ng m−3) and winter (1.80 ± 0.62 ng m−3) and lower levels in spring (1.16 ± 0.45 ng m−3) and summer (1.43 ± 0.46 ng m−3). Long-range atmospheric transport dominated by monsoons was a dominant factor influencing the seasonal variations of GEM. The GEM diel trends were related to the wind speed and long-range atmospheric mercury transport. We observed 30 pollution episodes throughout the monitoring period. The analysis of wind direction and backward trajectory suggested that elevated GEM concentrations at the monitoring site were primarily related to the outflows of atmospheric Hg from mainland China and the Indochina peninsula. The △GEM/△CO values also suggested that GEM was significantly affected by the long-range transport from the anthropogenic sources and biomass burning in Asia and Indochina peninsula.


Gaseous elemental mercury (GEM) Seasonal monsoons Long-range transport Back trajectories GEM/CO ratio 



This study was funded by the Commonwealth and Environmental Protection Project of the Ministry of Environmental Protection of the People’s Republic of China (MEP) (No. 200809011), the National Science Foundation of China (Nos. 41273107, 41573123 and 41172316) and Special Scientific Research Funds for Environmental Protection Commonweal Section (PM-zx021-201311-038). Dr. Xuewu Fu from the Institute of Geochemistry of Chinese Academy of Sciences reviewed the manuscript.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Ming Liu
    • 1
  • Laiguo Chen
    • 1
    Email author
  • Donghai Xie
    • 2
    Email author
  • Jiaren Sun
    • 1
  • Qiusheng He
    • 3
  • Limei Cai
    • 4
  • Zhiqiang Gao
    • 1
  • Yiqiang Zhang
    • 1
  1. 1.Urban Environment and Ecology Research Center, the Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences (SCIES)Ministry of Environmental Protection (MEP)GuangzhouChina
  2. 2.Hainan Research Academy of Environmental SciencesHaikouChina
  3. 3.School of Environment and SafetyTaiyuan University of Science and TechnologyTaiyuanChina
  4. 4.Ministry of Education Key Laboratory of Oil and Gas Resources and Exploration TechnologiesYangtze UniversityWuhanChina

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