Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Radiative Properties at King Sejong Station in West Antarctica with the Radiative Transfer Model : A Surface UV-A and Erythemal UV-B Radiation Changes

대기 복사 모형에 의한 남극 세종기지에서의 복사학적 특징 : 지표면에서 UV-A와 Erythemal UV-B 자외선 양 변화

  • Lee, Kyu-Tae (Department of Atmospheric and Environmental Sciences, Kangnung National University) ;
  • Lee, Bang-Yong (Polar Sciences Laboratory, KORDI) ;
  • Won, Young-In (Polar Sciences Laboratory, KORDI) ;
  • Jee, Joon-Bum (Department of Atmospheric and Environmental Sciences, Kangnung National University) ;
  • Lee, Won-Hak (Department of Atmospheric and Environmental Sciences, Kangnung National University) ;
  • Kim, Youn-Joung (Department of Atmospheric and Environmental Sciences, Kangnung National University)
  • 이규태 (강릉대학교 대기환경과학과) ;
  • 이방용 (한국해양연구원 극지연구본부) ;
  • 원영인 (한국해양연구원 극지연구본부) ;
  • 지준범 (강릉대학교 대기환경과학과) ;
  • 이원학 (강릉대학교 대기환경과학과) ;
  • 김윤정 (강릉대학교 대기환경과학과)
  • Published : 2003.03.31
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Abstract

A solar radiation model was used to investigate the UV radiation at the surface offing Sejong Station in West Antarctica. The results calculated by this model were compared with the values measured by UV-Biometer and UV-A meter during 1999-2000. In this study, the parameterization of solar radiative transfer process was based on Chou and Lee(1996). The total ozone amounts measured by Breve. Ozone Spectrophotometer and the aerosol amounts by Nakajima et al.(1996) was used as the input data of the solar radiative transfer model. And the surface albedo is assumed to be 0.20 in summer and 0.85 in winter. The sensitivity test of solar radiative transfer model was done with the variation of total ozone, aerosol amount, and surface albedo. When the cosine of solar zenith angle is 0.3, Erythemal UV-B radiation decreased 73% with the 200% increase of total ozone from 100 DU to 300 DU, but the decrease of UV-A radiation is about 1%. Also, for the same solar zenith angle, UV-A radiation was decreased 31.0% with the variation of aerosol optical thickness from 0.0 to 0.3 and Erythemal UV-B radiation was decreased only 6.1%. The increase of Erythemal W-B radiation with the variation of surface albedo was twice that of UV-A increase. The surface Erythemal UV-B and UV-A radiation calculated by solar raditive transfer model were compared with the measured values fer the relatively clear day at King Sejong Station in West Antarctica. The model calculated Erythemal UV-B radiation at the surface coincide well with the measured values except for cloudy days. But the difference between the model calculated UV-A radiation and the measured value at the surface was large because of cloud scattering effect. So, the cloud property data is needed to calculate the UV radiation more exactly at King Sejong Station in West Antarctica.

Keywords

References

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