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http://dx.doi.org/10.5572/KOSAE.2009.25.5.392

Measurement of Optical Properties of Ice-crystal Cloud using LIDAR System and Retrieval of Its Radiative Forcing by Radiative Transfer Model  

Noh, Young-Min (Department of Environmental Science & Engineering, Gwangju Institute of Science & Technology)
Shin, Dong-Ho (Department of Environmental Science & Engineering, Gwangju Institute of Science & Technology)
Lee, Kyung-Hwa (Department of Environmental Science & Engineering, Gwangju Institute of Science & Technology)
Muller, Detlef (Department of Environmental Science & Engineering, Gwangju Institute of Science & Technology)
Kim, Young-J. (Department of Environmental Science & Engineering, Gwangju Institute of Science & Technology)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.25, no.5, 2009 , pp. 392-401 More about this Journal
Abstract
Ice-crystal clouds observation was conducted using a GIST/ADEMRC Multi-wavelength Raman lidar system in order to measure vertical profile and optical depth at Gwangju ($35^{\circ}$10'N, $126^{\circ}$53'E), Korea in December 2002, and March and April 2003. Ice-crystal clouds at high altitude can be distinguished from atmospheric aerosols by high depolarization ratio and high altitude. Ice-crystal clouds were observed at 5~12 km altitudes with a high depolarization ratio from 0.2 to 0.5. Optical depth of ice-crystal clouds had varied from 0.14 to 1.81. The radiative effect of observed ice-crystal cloud on climate system was estimated to be negative net flux in short wavelength (0.25~$4.0{\mu}m$) and positive net flux in short+long wavelength (0.25~$100{\mu}m$) at top of the atmosphere. Net flux by ice-crys tal cloud per unit optical depth was comparable to that of Asian dust.
Keywords
Ice-crystal cloud; Lidar; Depolarization ratio; Optical depth; Radiative forcing;
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Times Cited By KSCI : 2  (Citation Analysis)
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