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Estimating Influence of Biogenic Volatile Organic Compounds on High Ozone Concentrations over the Seoul Metropolitan Area during Two Episodes in 2004 and 2007 June

자연배출량이 수도권 고농도 오존 사례에 미치는 영향범위 추정: 2004년과 2007년 6월 사례를 중심으로

  • Kim, Soon-Tae (Division of Environmental, Civil & Transportation Engineering, Ajou University)
  • 김순태 (아주대학교 환경건설교통공학부)
  • Received : 2011.07.25
  • Accepted : 2011.10.07
  • Published : 2011.12.31

Abstract

Biogenic Volatile Organic Compound (BVOC) emissions are estimated with BEIS3.12 (Biogenic Emissions Inventory System version 3.12) over the Seoul Metropolitan Area (SMA) and then used in CMAQ (Community Multiscale Air Quality) simulations for two high ozone episodes in 2004 and 2007 June. The first- and second-order sensitivity coefficients of ozone to BVOC emissions are estimated with High-order Decoupled Direct Method (HDDM) simulation in order to estimate the influence of BVOC emissions on ozone using the Zero-Out Contribution (ZOC) approach. ZOC analysis shows that relative contribution of BVOC emissions on daily maximum 1-hr ozone is as high as 30% for high ozone days above 100 ppb. However simulated isoprene concentrations were over-estimated by a factor of 2 when compared to the observations at the PAMS (Photochemical Air Monitoring Station) for the 2007 episode. When assumed that actual BVOC emissions are 50% less than estimated, the ZOC of BVOC emissions on daily maximum ozone drops by more than 10 ppb for the episode. The result indicates that uncertainty in BVOC emissions may have significant impact on high ozone prediction in the SMA.

Keywords

References

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