Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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A Quantitative Analysis of the Effect of Ocean Emissions on the Simulated Ozone Concentration in South Korea

국내 오존 모의 농도에 대한 해양 배출량의 영향 정량 분석

  • Park, Jaehyeong (Division of Earth Environmental System, Pusan National University) ;
  • Jeon, Wonbae (Department of Atmospheric Sciences, Pusan National University) ;
  • Mun, Jeonghyeok (Division of Earth Environmental System, Pusan National University) ;
  • Kim, Dongjin (Division of Earth Environmental System, Pusan National University)
  • 박재형 (부산대학교 지구환경시스템학부) ;
  • 전원배 (부산대학교 대기환경과학과) ;
  • 문정혁 (부산대학교 지구환경시스템학부) ;
  • 김동진 (부산대학교 지구환경시스템학부)
  • Received : 2021.05.11
  • Accepted : 2021.05.20
  • Published : 2021.05.31
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Abstract

In this study, we quantitatively analyze the effect of ocean emission sources on the simulated O3 concentrations in South Korea using the community multi-scale air quality (CMAQ) model. To analyze changes in O3 concentrations by ocean emissions, two different CMAQ simulations considering ocean emissions (OE case) and without considering ocean emissions (NE case) were conducted during the Korea-United States air quality (KORUS-AQ) campaign period (May-June 2016). The changes in the simulated O3 concentrations due to the effect of ocean emissions (OE case-NE case) appeared mostly in the ocean areas (+1.201 ppbv). The effect of ocean emissions was positive during the daytime (+1.813 ppbv), but negative during the nighttime (-0.612 ppbv). Analysis using the integrated process rate (IPR) confirmed that the increase or decrease in O3 concentration by ocean emissions was mainly due to chemical processes. Further analysis using the integrated reaction rate (IRR) showed that the daytime increase in O3 concentration was mainly attributable to the increased O3 production via O + O2 + M → O3 + M reaction as photolysis of NO2 increased due to the added ocean emissions. The nighttime decrease in O3 concentration was mainly due to the increased O3 titration by NO (NO + O3 → O2 + NO2) due to the increased NO emission. These results indicate that the changes in the concentration O3 in the sea area by the effect of ocean emissions are mainly due to increased NOx emissions. However, there could be a number of uncertainties in ocean emissions data used in this study, thus continuous comparative research using the most updated data will need to be carried out in the future.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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