Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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A Study on Spatial Differences in PM2.5 Concentrations According to Synoptic Meteorological Distribution

종관 기상 분포에 따른 PM2.5 농도의 공간적 차이에 관한 연구

  • Da Eun, Chae (Department of Earth Science, Pusan National University) ;
  • Soon-Hwan, Lee (Department of Earth Science Education, Pusan National University)
  • 채다은 (부산대학교 지구과학과) ;
  • 이순환 (부산대학교 지구과학교육과)
  • Received : 2022.11.11
  • Accepted : 2022.12.05
  • Published : 2022.12.31
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Abstract

To investigate the reason for the spatial difference in PM2.5 (Particulate Matter, < 2.5 ㎛) concentration despite a similar synoptic pattern, a synoptic analysis was performed. The data used for this study were the daily average PM2.5 concentration and meteorological data observed from 2016 to 2020 in Busan and Seoul metropolitan areas. Synoptic pressure patterns associated with high PM2.5 concentration episodes (greater than 35 ㎍/m3) were analyzed using K-means cluster analysis, based on the 900 hPa geopotential height of NCEP (National Centers for Environmental Prediction) FNL (Final analysis) data. The analysis identified three sub-groups related to high concentrations occurring only in Busan and Seoul metropolitan areas. Although the synoptic patterns of high PM2.5 concentration episodes that occur independently in Busan and Seoul metropolitan areas were similar, there was a difference in the intensity of pressure gradient and its direction, which tends to be an important factor determining the movement time of pollutants. The spatial difference in PM2.5 concentration in the Korean Peninsula is due to the difference and direction of the atmospheric pressure gradient that develops from southwest to northeast direction.

Keywords

Acknowledgement

본 연구는 부산대학교 기본연구지원사업(2년)의 지원으로 수행되었습니다.

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