Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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The Fluctuation of Aerosol Number Concentration by Wind Field Variation during Snowfall at the Southwestern Coastal Area

남서해안지역 강설시 바람장 변화에 따른 에어로솔 수 농도 변동

  • Lee, Dong-In (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kang, Mi-Young (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Seo, Kil-Jong (Department of UR Interdisciplinary Program of Earth Environmental Engineering, Pukyong National University) ;
  • You, Cheol-Hwan (Korea Meteorological Administration) ;
  • Park, Sung-Hwa (Department of UR Interdisciplinary Program of Earth Environmental Engineering, Pukyong National University) ;
  • Kim, Poo-Kyoung (Department of UR Interdisciplinary Program of Earth Environmental Engineering, Pukyong National University) ;
  • Park, Nam-Sik (Environmental conservation Division, Busan Metropolitan city)
  • 이동인 (부경대학교 환경대기과학과) ;
  • 강미영 (부경대학교 환경대기과학과) ;
  • 서길종 (부경대학교 지구환경공학연협동과정) ;
  • 유철환 (기상청) ;
  • 박성화 (부경대학교 지구환경공학연협동과정) ;
  • 김부경 (부경대학교 지구환경공학연협동과정) ;
  • 박남식 (부산시청 환경보전과)
  • Published : 2008.06.30
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Abstract

To understand the development mechanism of the aerosols in the surface boundary layer, the variation in the aerosol number concentration due to the divergence and convergence of the wind fields was investigated. The aerosol number concentration was measured in the size ranges of $0.3{\sim}10.0{\mu}m$ using a laser particle counter(LPC) from 0000 LST on 03 Feb. to 0600 LST on 07 Feb. 2004 at Mokpo in Korea during snowfall. The Velocity Azimuth Display(VAD) technique was used to retrieve the radar wind fields such as the horizontal wind field, divergence, and deformations including the vertical air velocity from a single Doppler radar. As a result, the distribution of the aerosol number concentration is apparently different for particles larger than $1{\mu}m$ during snowfall, and it has a tendency to increase at the beginning of the snowfall. The increase and decrease in the aerosol concentration due to the convergence and divergence of the wind fields corresponded to the particles with diameters greater than $1{\mu}m$. It is found that the fluctuations in the aerosol number concentration are well correlated with the development and dissipation of snowfall radar echoes due to the convergence and divergence of horizontal wind fields near the surface boundary layer in the inland during the snowfall.

Keywords

References

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