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Comparison of Model Results for Variation and Resolution of Meteorological Field Using HY-SPLIT

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2010, 19(3), pp.223-230
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

Chongbum Lee 1 김재철 1 박상진 1 장윤정 1

1강원대학교

Accredited

ABSTRACT

Trajectory dispersion models are used for the dispersion calculations in air quality assessments, Yellow-sand modeling, environmental planning and the emergency response. Meso-scale forcing and coastal circulations are calculated by trajectory model in the East Asia region. In this study the meteorological fields (GDAS and MM5) coupled to the trajectory model (HY-SPLIT) are applied to simulate the transport and the dispersion. Seoul is selected as a starting point of the HY-SPLIT. The sensitivity studies are performed by conducting an ensemble of simulations using the GDAS and the MM5 model for the same dispersion cases. The results in this study show a significant difference depending on the resolution of meteorological models. Additionally, in most cases of the compared tionally,results from MM5and GDAS, the absolute and relative distance, shows significant difference and the difference increased with the increasing distance of HY-SPLIT. Therefore, for the case of small domai for twi d field distefbution over complex terrai , should be used only high model temporal or spatial resolution to improve the HY-SPLIT model results.

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