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Spatial-temporal variations in surface ozone concentrations in Busan metropolitan area

부산지역 오존농도의 시·공간 분포 변화

  • Kang, Yoon-Hee (The Institute of Environmental Studies, Pusan National University) ;
  • Kim, Yoo-Keun (Department of Atmospheric Sciences, Pusan National University) ;
  • Hwang, Mi-Kyeong (The Institute of Environmental Studies, Pusan National University) ;
  • Jeong, Ju-Hee (The Institute of Environmental Studies, Pusan National University) ;
  • Kim, Hyunsu (Short-term Demand Forecast Team, Korea Power Exchange) ;
  • Kang, Min-Seong (Institute of Human Environment and Prognosis, Dong-Eui University)
  • 강윤희 (부산대학교 환경연구원) ;
  • 김유근 (부산대학교 대기환경과학과) ;
  • 황미경 (부산대학교 환경연구원) ;
  • 정주희 (부산대학교 환경연구원) ;
  • 김현수 (한국전력거래소 수요예측팀) ;
  • 강민성 (동의대학교 휴먼환경예지연구소)
  • Received : 2018.11.05
  • Accepted : 2019.01.22
  • Published : 2019.02.28

Abstract

Temporal and spatial variations in surface ozone concentrations in Busan were investigated by using observation data from urban air quality sites during 2001-2016. The annual ozone concentrations showed a significant increasing trend of $+0.40ppb\;yr^{-1}$ in this period, with a more rapid increase of $+0.81ppb\;yr-1$ since 2010. For the monthly analysis, the increase in ozone concentration was the greatest in August ($+0.68ppb\;yr-1$). These ozone trends were due mainly to rising temperature ($+0.05^{\circ}C\;yr^{-1}$) and weak decreasing precipitation ($-6.42mm\;yr^{-1}$). However, the extreme weather events (heat wave, localized heavy rain, etc.) lead to an increase in short-term variability of ozone since 2010. The relatively low ozone concentrations in the downtown area were caused by high NOx emissions from mobile sources. The increases in ozone concentrations were observed at most of the air quality monitoring sites due to the reductions in anthropogenic emissions of NOx during 2001-2015. However, in the southern coastal area, lower rates of increase in ozone concentrations were observed by $-0.10{\sim}0.25ppb\;yr^{-1}$ due to the significant NOx emitted by ships in the Busan port and Busan new port.

Keywords

Surface ozone;Temperature;Precipitation;Anthropogenic emission;NOx

Acknowledgement

Supported by : 부산대학교

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