Lidar mapping of atmospheric atomic mercury in the Wanshan area, China

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A novel mobile laser radar system was used for mapping gaseous atomic mercury (Hg0) atmospheric pollution in the Wanshan district, south of Tongren City, Guizhou Province, China. This area is heavily impacted by legacy mercury from now abandoned mining activities. Differential absorption lidar measurements were supplemented by localized point monitoring using a Lumex RA-915M Zeeman modulation mercury analyzer. Range-resolved concentration measurements in different directions were performed. Concentrations in the lower atmospheric layers often exceeded levels of 100 ng/m3 for March conditions with temperature ranging from 5 °C to 20 °C. A flux measurement of Hg0 over a vertical cross section of 0.12 km2 resulted in about 29 g/h. Vertical lidar sounding at night revealed quickly falling Hg0 concentrations with height. This is the first lidar mapping demonstration in a heavily mercury-polluted area in China, illustrating the lidar potential in complementing point monitors.


  • Ming Lian
  • Lihai Shang
  • Zheng Duan
  • Yiyun Li
  • Guangyu Zhao
  • Shiming Zhu
  • Guangle Qiu
  • Bo Meng
  • Jonas Sommar
  • Xinbin Feng
  • Sune Svanberg
Enheter & grupper
Externa organisationer
  • South China Normal University
  • Institute of Geochemistry, Chinese Academy of Sciences

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Meteorologi och atmosfärforskning
  • Atom- och molekylfysik och optik


Sidor (från-till)353-358
Antal sidor6
TidskriftEnvironmental Pollution
StatusPublished - 2018 sep 1
Peer review utfördJa