Asian Journal of Atmospheric Environment

Korean Society for Atmospheric Environment (한국대기환경학회)
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Seasonal Variations in Mercury Deposition over the Yellow Sea, July 2007 through April 2008

  • Ghim, Young Sung (Department of Environmental Science, Hankuk University of Foreign Studies) ;
  • Oh, Hyun Sun (Department of Environmental Science, Hankuk University of Foreign Studies) ;
  • Kim, Jin Young (Green City Technology Institute, Korea Institute of Science and Technology) ;
  • Woo, Jung-Hun (College of Global Integrated Studies, Konkuk University) ;
  • Chang, Young-Soo (Environmental Science Division, Argonne National Laboratory)
  • Received : 2016.05.17
  • Accepted : 2016.08.28
  • Published : 2016.09.30
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Abstract

Spatial and temporal variations of mercury, including dry and wet deposition fluxes, were assessed over Northeast Asia, targeting the Yellow Sea, using meteorology and chemistry models. Four modeling periods, each representative of one of the four seasons, were selected. Modeling results captured general patterns and behaviors, and fell within similar ranges with respect to observations. However, temporal variations of mercury were not closely matched, possibly owing to the effects of localized emissions. Modeling results indicated that dry deposition is correlated with wind speed, while wet deposition is correlated with precipitation amount. Overall, the wet deposition flux of $66ng/m^2-day$ was about twice as large as the dry deposition flux of $32ng/m^2-day$, when averaged over the four modeling periods. Dry deposition occurred predominantly in the form of reactive gaseous mercury (RGM). In contrast, RGM accounted for only about two-thirds of wet deposition, while particulate mercury accounted for the remainder.

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References

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