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Photochemical Analysis of Ozone Levels in the Gulf of Gwangyang in the Spring and Summer of 2009

2009년 봄, 여름철 광양만 지역 오존의 광화학적 특성 분석

  • Shon, Zang-Ho (Department of Environmental Engineering, Dong-Eui University) ;
  • Song, Sang-Keun (Division of Earth Environmental System, Pusan National University) ;
  • Lee, Gang-Woong (Department of Environmental Sciences, Hankuk University of Foreign Studies)
  • 손장호 (동의대학교 환경공학과) ;
  • 송상근 (부산대학교 지구환경시스템학부) ;
  • 이강웅 (한국외국어대학교 환경과학과)
  • Received : 2010.01.08
  • Accepted : 2010.04.19
  • Published : 2010.04.30

Abstract

We examined high ozone episodes observed during the intensive measurement periods (11 May~21 June and 30 July~11 August 2009) in the Gulf of Gwangyang. During that period, there were a few events (or days) in which 1 hr averaged ozone concentrations were greater than 100 ppbv. The analysis of ozone budget and photochemical characteristics related to the ozone production was carried out using a photochemical box model. Ozone sensitivity to $NO_x$ and VOCs was also examined in the study area during the measurement period. Diurnal variation of ozone during the episodes was similar to that of odd hydrogen radicals ($HO_2,CH_3O_2$, and $RO_2$), suggesting significant correlation with photochemical production of ozone during the episodes. In general, ozone concentration in the study area during the measurement period was sensitive to VOCs, whereas ozone was sensitive to $NO_x$ under certain conditions. Ozone sensitivity assessment using a radical budget analysis and $NO_x$/VOCs-control strategy was consistent with that using indicator species ($H_2O_2/HNO_3$ ratio).

Acknowledgement

Grant : 고농도 오존발생 원인 규명을 위한 정밀 조사

Supported by : 한국환경산업기술원

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