한국환경과학회지 (Journal of Environmental Science International)

  • 제28권3호
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  • Pages.341-356
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  • 2019
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  • 1225-4517(pISSN)
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  • 2287-3503(eISSN)
한국환경과학회 (The Korean Environmental Sciences Society)
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Impacts of Local Meteorology caused by Tidal Change in the West Sea on Ozone Distributions in the Seoul Metropolitan Area

  • 김성민 (부산대학교 지구환경시스템학부) ;
  • 김유근 (부산대학교 대기환경과학과) ;
  • 안혜연 (부산대학교 지구환경시스템학부) ;
  • 강윤희 (부산대학교 환경연구원) ;
  • 정주희 (부산대학교 환경연구원)
  • Kim, Sung Min (Division of Earth Environmental System, Pusan National University) ;
  • Kim, Yoo-Keun (Department of Atmospheric Sciences, Pusan National University) ;
  • An, Hye Yeon (Division of Earth Environmental System, Pusan National University) ;
  • Kang, Yoon-Hee (The Institute of Environmental Studies, Pusan National University) ;
  • Jeong, Ju-Hee (The Institute of Environmental Studies, Pusan National University)
  • 투고 : 2018.12.06
  • 심사 : 2019.01.03
  • 발행 : 2019.03.31
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초록

In this study, the impacts of local meteorology caused by tidal changes in the West Sea on ozone distributions in the Seoul Metropolitan Area (SMA) were analyzed using a meteorological model (WRF) and an air quality (CMAQ) model. This study was carried out during the day (1200-1800 LST) between August 3 and 9, 2016. The total area of tidal flats along with the tidal changes was calculated to be approximately $912km^2$, based on data provided by the Environmental Geographic Information Service (EGIS) and the Ministry of Oceans and Fisheries (MOF). Modeling was carried out based on three experiments, and the land cover of the tidal flats for each experiment was designed using the coastal wetlands, water bodies (i.e., high tide), and the barren or sparsely vegetated areas (i.e., low tide). The land cover parameters of the coastal wetlands used in this study were improved in the herbaceous wetland of the WRF using updated albedo, roughness length, and soil heat capacity. The results showed that the land cover variation during high tide caused a decrease in temperature (maximum $4.5^{\circ}C$) and planetary boundary layer (PBL) height (maximum 1200 m), and an increase in humidity (maximum 25%) and wind speed (maximum $1.5ms^{-1}$). These meteorological changes increased the ozone concentration (about 5.0 ppb) in the coastal areas including the tidal flats. The increase in the ozone concentration during high tide may be caused by a weak diffusion to the upper layer due to a decrease in the PBL height. The changes in the meteorological variables and ozone concentration during low tide were lesser than those occurring during high tide. This study suggests that the meteorological variations caused by tidal changes have a meaningful effect on the ozone concentration in the SMA.

키워드

참고문헌

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