Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Analysis of Photochemical Ozone Formation Regime in Busan - Comparative Study on Busan vs. Seoul Metropolitan Area(Ⅳ)

부산지역 광화학 오존 생성 regime 분석 - 수도권과 비교연구 (Ⅳ)

  • Seung-Hee Baek (Department of Atmospheric Sciences, Pusan National university) ;
  • Hyo-Jung Lee (Department of Atmospheric Sciences, Pusan National university) ;
  • Cheol-Hee Kim (Department of Atmospheric Sciences, Pusan National university)
  • 백승희 (부산대학교 대기환경과학과) ;
  • 이효정 (부산대학교 대기환경과학과) ;
  • 김철희 (부산대학교 대기환경과학과)
  • Received : 2022.12.02
  • Accepted : 2023.05.04
  • Published : 2023.05.31
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Abstract

This study analyzed characteristics of ozone (O3) formation regimes in Busan over a period of recent five years (2015~2019) and compared the findings with those obtained in Seoul. We employed four observed variations: early morning commuting-hour (i.e., 06:00-09:00 LST) nitrogen dioxide (NO2), peak-hour (i.e., 12:00-16:00 LST) O3, 8-hour average O3 (MDA8 O3), and △O3 (=O3_max- O3_min) in Busan and Seoul. In addition, the NO2-O3 relation was assessed to interpret which of NOx-limited or volatile organic compound (VOC)-limited was dominant. In Busan, the annual mean O3 concentration was relatively higher than in Seoul, whereas there were fewer high-concentration days. The Pearson correlation coefficients (R) between Early morning-hour NO2 and the Peak-hour O3 was positive (but close to zero) in Busan and negative in Seoul. Likewise, the R between the Early morning-hour NO2 and the △O3 showed a relatively considerable positive correlation (R=+0.4~0.5)(R=+0.4~0.5) in Busan, while a weak positive correlation (R=+0.1~0.2) in Seoul. From this result, it can be inferred that the O3 formation regime in Busan was intrepreted to be nearly neutral or relatively closer to the NOx-limited regime than Seoul, while Seoul to the VOC-limited regime. The study findings imply that O3 control strategies should be applied differently in Busan and Seoul. The results here were inferred from surface NO2 and O3 observations, and the varification studies based on in-situ VOCs measurements would be needed.

Keywords

Acknowledgement

이 논문은 2020년도 정부(교육부)의 재원으로 한국연구재단 기초연구사업의 지원을 받아 수행된 연구입니다(No. 2020R1A6A1A03044834). 본 논문을 세심하게 심사해 주신 심사위원분들께 감사드립니다.

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