A Study of Ozone Photochemistry in Different Physico-chemical Properties of Air Masses around the Mexico City Metropolitan Area (MCMA) Using Aircraft Observations in 2006

항공관측자료를 이용한 2006년 멕시코시티 주변 기류의 물리-화학적 성질에 따른 오존의 광화학적 특성 연구

  • Song, Sang-Keun (Division of Earth Environmental System, Pusan National University) ;
  • Shon, Zang-Ho (Department of Environmental Engineering, Dong-Eui University) ;
  • Kim, Yoo-Keun (Division of Earth Environmental System, Pusan National University)
  • 송상근 (부산대학교 지구환경시스템학부) ;
  • 손장호 (동의대학교 환경공학과) ;
  • 김유근 (부산대학교 지구환경시스템학부)
  • Received : 2009.11.27
  • Accepted : 2010.04.08
  • Published : 2010.04.30


Photochemical characteristics of ozone ($O_3$) and its precursors such as $O_3$ budget and $O_3-NO_x$-VOC sensitivity were analyzed in different physico-chemical properties of air masses around the Mexico City Metropolitan Area (MCMA) using aircraft observations during March 2006. The physico-chemical properties of air masses were categorized into 5 groups: boundary layer (BL), biomass burning (BB), free tropospheric continent (FTCO) and marine (FTMA), and Tula industrial complex (TIC). Results from the $O_3$ budget analysis indicated that $O_3$ production for BL, FTCO, and FTMA (for BB and TIC) was mainly controlled by a photochemical production pathway, a reaction of NO with $HO_2$ (with $RO_2$), while the main pathway of photochemical $O_3$ destruction for BL, FTCO, and FTMA (for BB and TIC) was a reaction of $HO_2$ with $O_3$ (of $H_2$ with $O^1$(D)). In addition, most of air mass categories (especially FTCO) were estimated to be $NO_x$-sensitive for $O_3$ production with lower $NO_y$, higher ratios of the other indicator species (e.g., $O_3/(NO_y-NO_x$), $H_2O_2/HNO_3$, etc.), and the lower removal rate of radicals ($\leq$0.5) by the reaction of OH with $NO_2$ than those of the VOC-sensitive condition.


Supported by : 한국학술진흥재단, 동의대학교


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