Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Quantitative Estimation of Precipitation Scavenging and Wind Dispersion Contributions for PM10 and NO2 Using Long-term Air and Weather Monitoring Database during 2000~2009 in Korea

장기간 대기오염 및 기상측정 자료 (2000~2009)를 이용한 PM10과 NO2의 강수세정 기여율과 바람분산 기여율의 정량적 추정연구

  • Lim, Deuk-Yong (Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University) ;
  • Lee, Tae-Jung (Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University) ;
  • Kim, Dong-Sool (Department of Environmental Science and Engineering, College of Engineering, Kyung Hee University)
  • 임득용 (경희대학교 공과대학 환경학 및 환경공학과 대기오염연구실) ;
  • 이태정 (경희대학교 공과대학 환경학 및 환경공학과 대기오염연구실) ;
  • 김동술 (경희대학교 공과대학 환경학 및 환경공학과 대기오염연구실)
  • Received : 2012.02.21
  • Accepted : 2012.04.24
  • Published : 2012.06.30
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Abstract

Long-term air and weather data monitored during the period of 2000 to 2009 were analyzed to quantitatively estimate the precipitation scavenging and wind dispersion contributions of ambient $PM_{10}$ and $NO_2$ in Korea. Both air pollutants and meteorological data had been respectively collected from 120 stations by the Ministry of Environment and from 20 weather stations by the Korea Meteorological Administrations in all parts of Korea. To stochastically identify the relation between a meteorological factor and an air pollutant, we initially defined the SR (scavenging ratio) and the DR (dispersion ratio) to separately calculate the precipitation and wind speed effects on the removal of a specific air pollutant. We could then estimate the OSC (overall scavenging contribution) and the ODC (overall dispersion contribution) with considering sectoral precipitation and wind speed probability density distributions independently. In this study, the SRs for both $PM_{10}$ and $NO_2$ were generally increased with increasing the amounts of precipitation and then the OSCs for $PM_{10}$ and $NO_2$ were estimated by 22.3% and 15.7% on an average in Korea, respectively. However, the trend of the DR was quite different from that of SR. The DR for $PM_{10}$ was increased with increasing wind speed up to 2.5 m/s and further the DR for $NO_2$ showed a minimum in the range of $1<WS{\leq}1.5$. The ODCs for $PM_{10}$ and $NO_2$ were estimated by 14.9% and 1.0% in Korea, respectively. Finally, we have also provided an interesting case study observed in Seoul.

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References

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