Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Characterizing Regional Ozone Concentration Changes Due to the Adoption of Eco-Friendly Vehicles in South Korea

친환경 자동차 도입에 따른 지역별 오존 농도 변화 특성 분석

  • Chaeyeong Yang (Division of Earth and Atmospheric Sciences, Pusan National University) ;
  • Wonbae Jeon (Department of Atmospheric Sciences, Pusan National University) ;
  • DongJin Kim (Division of Earth and Atmospheric Sciences, Pusan National University) ;
  • Jaehyeong Park (Division of Earth and Atmospheric Sciences, Pusan National University) ;
  • Hyeonsik Choe (Division of Earth and Atmospheric Sciences, Pusan National University) ;
  • Jeonghyeok Mun (Division of Earth and Atmospheric Sciences, Pusan National University)
  • 양채영 (부산대학교 지구환경시스템학부) ;
  • 전원배 (부산대학교 대기환경과학과) ;
  • 김동진 (부산대학교 지구환경시스템학부) ;
  • 박재형 (부산대학교 지구환경시스템학부) ;
  • 최현식 (부산대학교 지구환경시스템학부) ;
  • 문정혁 (부산대학교 지구환경시스템학부)
  • Received : 2023.08.10
  • Accepted : 2023.09.01
  • Published : 2023.09.30
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Abstract

This study investigates the impact of increased adoption of eco-friendly vehicles on ozone (O3) concentrations in South Korea, utilizing the community multiscale air quality (CMAQ) model. In the summer of 2017 (June-August), we conducted two experiments: a BASE experiment, representing baseline emissions, and an R_30 experiment, involving a 30% emission reduction due to eco-friendly vehicles. The contrast between these experiments reveals that, while most air pollutants decreased with reduced vehicle emissions, O3 concentrations surprisingly increased (up to 2.1 parts per billion) across South Korea. A further examination of O3 concentration changes was conducted by analyzing daytime and nighttime variations as well as wind direction. During the daytime, O3 concentrations notably rose near metropolitan areas due to reduced O3 titration (O3 + NO → O2 + NO2) resulting from emission reductions. At nighttime, O3 concentrations exhibited a greater increase, attributed to the transport of daytime-generated O3 to rural regions. Notably, the impact of reduced emissions in metropolitan areas on O3 concentrations in downwind areas varied depending on the prevailing wind direction. These findings highlight that the promotion of eco-friendly vehicles, though effective in lowering certain air pollutants, might not directly influence O3 concentrations. This study underscores the need to comprehensively understand the complicated chemistry of O3 to develop effective strategies for air quality management.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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