Journal of Atmospheric and Environmental Optics ›› 2010, Vol. 5 ›› Issue (1): 19-25.

• 论文 • Previous Articles     Next Articles

Cloud Radiative Transfer Simulation Using LibRadtran and Comparisons with SBDART

SUN Yu1, LIN Long-fu2, ZHAO Zeng-liang2, YAN Wei1, YAO Zhi-gang2   

  1. (1 Institude of Meteorology, PLA University of Science and Technology, Nanjing 211101, China; 
    2 Beijing Institude of Applied Meteorology, Beijing 100029, China)
  • Received:2009-09-07 Revised:2009-11-20 Online:2010-01-28 Published:2010-01-26

Abstract:

Parameterization of water cloud and ice cloud optical properties included in the libRadtran software package are introduced. These optical properties contain single-scattering albedo, extinction coefficient and asymmetry factor. Then simulations for water cloud and ice cloud at 0.65um、1.64 um and 2.13 um are conducted. Comparison with SBDART simulation shows that there are similar results in the visible region and significant differences in the solar near-infrared region. Parameterization of ice cloud for various particle habits in the libRadtran have better approximation than Mie calculation for sphere ice particles used in the SBDART. A pre-computed look-up table (LUT) of the bidirectional reflection in retrieving ice clouds optical thickness and effective particle radius could be improved by libRadtran.

Key words: radiative transfer simulation, libRadtran, SBDART

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