Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Characteristics of Long-Range Transport of Air Pollutants due to Different Transport Patterns over Northeast Asia

동북아시아 대기오염물질의 이동 패턴에 따른 장거리 수송 특성 연구

  • Park, Sin-Young (Department of Atmospheric Sciences, Pusan National University) ;
  • Kim, Yun-Jong (Department of Atmospheric Sciences, Pusan National University) ;
  • Kim, Cheol-Hee (Department of Atmospheric Sciences, Pusan National University)
  • 박신영 (부산대학교 지구환경시스템학부 대기과학전공) ;
  • 김연종 (부산대학교 지구환경시스템학부 대기과학전공) ;
  • 김철희 (부산대학교 지구환경시스템학부 대기과학전공)
  • Received : 2011.11.04
  • Accepted : 2012.03.09
  • Published : 2012.04.30
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Abstract

This paper investigates the physical and chemical characteristics of long-range transport (LRT) process of air pollutants by employing the MM5-CMAQ and its comparison with local emission dominant (LED) case over northeast Asia. We first classified high air pollution days into LRT and LED cases based on the synoptic meteorological variables of vorticity and geostrophic wind speed/direction at a geopotential level of over 850hPa. LRT cases are further categorized into three types of transport patterns (LRT-I-III) according to the air mass pathways from source regions. LRT-I-III are originated from northern, central, and southern China, respectively, identified by back trajectory analysis. Three LRT-I-III groups have different and unique locations of high pressure and transport pathways. The chemical characteristics showed that the simulated spatial distributions varied in terms of locations of maximum concentrations and the temporal variation of surface concentrations. The primary air pollutants such as $NO_x$, $PM_{10}$ and $SO_2$ of all of three LRT cases are well transported into Korea peninsula with different concentration levels. Of LRT cases, LRT-II has the greatest effect on air quality of Korea peninsula, followed by LRT-I and LRT-III. In comparison with LRT, the LED case shows relatively higher air pollution concentrations in general, but showed a variety of different air quality levels following the emission strength pattern. These widely varying patterns are impling the case dependent multi-directional approach for the development of indicators of long-range transport process over northeast Asia.

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References

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