Atmosphere (대기)

Korean Meteorological Society (한국기상학회)
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Analysis of Aerosol Optical Properties in Seoul Using Skyradiometer Observation

스카이라디오미터 관측을 통한 서울 상공 에어러솔의 광학적 특성 분석

  • Koo, Ja-Ho (IEEA, BK21 program, Global Environmental Laboratory/Department of Atmospheric Sciences, Yonsei University) ;
  • Kim, Jhoon (IEEA, BK21 program, Global Environmental Laboratory/Department of Atmospheric Sciences, Yonsei University) ;
  • Kim, Mi-Jin (IEEA, BK21 program, Global Environmental Laboratory/Department of Atmospheric Sciences, Yonsei University) ;
  • Cho, Hi Ku (IEEA, BK21 program, Global Environmental Laboratory/Department of Atmospheric Sciences, Yonsei University) ;
  • Aoki, Kazuma (Department of Earth Science, University of Toyama) ;
  • Yamano, Maki (Center for Climate System Research, University of Tokyo)
  • 구자호 (연세대학교 대기과학과 지구환경연구소) ;
  • 김준 (연세대학교 대기과학과 지구환경연구소) ;
  • 김미진 (연세대학교 대기과학과 지구환경연구소) ;
  • 조희구 (연세대학교 대기과학과 지구환경연구소) ;
  • ;
  • Received : 2007.08.11
  • Accepted : 2007.12.29
  • Published : 2007.12.31
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Abstract

Optical characteristics of aerosols in Seoul are investigated from the measurements of sky radiance by Skyradiometer at Yonsei University from December 2005 to November 2006. Aerosol optical depth (AOD) shows a maximum in June due to weak ventilation and particle growth by aging process and hygroscopic effect. Single scattering albedo (SSA) and Angstrom Exponent (AE) show the lowest value in spring due to the Asian dust. It is clear that coarse mode is dominant in spring and fine mode is dominant in summer from the volume size distribution measured in this study. The explanations on the changes of aerosol loadings are provided through the correlation between AOD and AE, while the pattern of wavelength dependency related to particle size is shown through the correlation between SSA and AE. Backward trajectory analysis by HYSPLIT provides information about origin of aerosol, which allows us to classify the case according to the source region and the path distance. Although the direction of backward trajectory traces back mostly to west, coarse mode particle is dominant in the case of long pathway and fine mode particle is dominant in the case of short pathway. This discrepancy is caused by the regional difference of emitted particles.

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