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Analysis of PM2.5 Concentration and Contribution Characteristics in South Korea according to Seasonal Weather Patterns in East Asia : Focusing on the Intensive Measurement Periods in 2015

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2019, 28(3), pp.183-200
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering
  • Published : June 30, 2019

Kipyo Nam ORD ID 1 Daegyun Lee 2 Limsuk Jang 2

1국립환경과학원
2국립환경과학원 대기질통합예보센터

Accredited

ABSTRACT

In this study, the characteristics of seasonal PM2.5 behavior in South Korea and other Northeast Asian regions were analyzed by using the PM2.5 ground measurement data, weather data, WRF and CMAQ models. Analysis of seasonal PM2.5 behavior in Northeast Asia showed that PM2.5 concentration at 6 IMS sites in South Korea was increased by long-distance transport and atmospheric congestion, or decreased by clean air inflow due to seasonal weather characteristics. As a result of analysis by applying BFM to air quality model, the contribution from foreign countries dominantly influenced the PM2.5 concentrations of Baengnyeongdo due to the low self-emission and geographical location. In the case of urban areas with high self-emissions such as Seoul and Ulsan, the PM2.5 contribution from overseas was relatively low compared to other regions, but the standard deviation of the season was relatively high. This study is expected to improve the understanding of the air pollutant phenomenon by analyzing the characteristics of PM2.5 behavior in Northeast Asia according to the seasonal weather condition change. At the same time, this study can be used to establish the air quality policy in the future, knowing that the contribution of PM2.5 concentration to the domestic and overseas can be different depending on the regional emission characteristics.

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