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Analysis of Recent Trends of Particulate Matter Observed in Busan - Comparative Study on Busan vs. Seoul Metropolitan Area (I)

부산지역 미세먼지 최근 경향 분석 - 수도권과 비교연구 (I)

  • Kim, Jong-Min (Atmospheric Sciences Major, Department of Earth Environmental System, Pusan National University) ;
  • Jo, Yu-Jin (Atmospheric Sciences Major, Department of Earth Environmental System, Pusan National University) ;
  • Yang, Geum-Hee (Atmospheric Sciences Major, Department of Earth Environmental System, Pusan National University) ;
  • Heo, Gookyoung (Policy Support Team, National Center for Fine Dust Information) ;
  • Kim, Cheol-Hee (Atmospheric Sciences Major, Department of Earth Environmental System, Pusan National University)
  • 김종민 (부산대학교 지구환경시스템학부 대기과학전공) ;
  • 조유진 (부산대학교 지구환경시스템학부 대기과학전공) ;
  • 양금희 (부산대학교 지구환경시스템학부 대기과학전공) ;
  • 허국영 (환경부 국가미세먼지정보센터 정책지원팀) ;
  • 김철희 (부산대학교 지구환경시스템학부 대기과학전공)
  • Received : 2020.01.31
  • Accepted : 2020.02.12
  • Published : 2020.02.29

Abstract

We analyzed the recent characteristics of Particulate Matter (PM) including PM10 (PM with diameter of less than 10 ㎛) and PM2.5 (PM with diameter of less than 2.5 ㎛) observed in Busan metropolitan area, and compared them with those measured in Seoul metropolitan area. This analysis includes the monthly, seasonal, and annual variations and differences, in emissions and chemical compositions observed in both Busan and Seoul areas. Synoptic meteorological conditions were investigated at the time when high PM concentrations occurred in each of the two areas. The results showed clearly decreasing trends of annual mean concentrations with strong seasonal variations: lower in summer and higher in winter in both areas. In comparison with Seoul, the seasonal variation in Busan demonstrated relatively lower, but showed greater summer fluctuations than in Seoul metropolitan area. This is implying the importance of secondary generation of PM in summer via active photochemical reaction in Busan area. In high concentration days, Busan's chemical composition of sulfate was higher than that of nitrate in summer, whereas nitrate was higher than sulfate in Seoul. The ratios of NO3- to SO42-(N/S ratio) showed lower in Busan approximately by a factor of 1/2(half of N/S ratio) in Busan compared with that in Seoul. Others such as synoptic characteristics and emission differences were also discussed in this study.

Acknowledgement

Supported by : 부산대학교

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