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《SCIENTIA ATMOSPHERICA SINICA》 1996-01
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A Theoretical Study of Retrieving Cloud Optical Depth from Total Solar Radiation

Qiu Jinhuan(Institute of Atmospheric Physics,Chinese Academy Of Sciences,Beijing 100029)  
This paper theoretically studies a method of retrieving the cloud optical depth from total solar radiation and analyzes main sources of errors in the optical depth solution.Theoretical analysis and numerical experiments show that accuracy of the cloud optical depth solution mainly depends on the error of aerosol optical property,if the error of the aerosol optical depth is within 30% or the error of its refractive index within 0.01,the error in the solution of cloud optical depth can be less than 15%. Besides,this paper devolops a two-layer δ-Eddington approximation with some empirical correction.The accuracy of this approximation is higher than Eddington and δ-Eddington approximations.The approximation is suitable for the present inversion algorithm by which details of extinction coefficient profiles of cloud and aerosol are not needed.
【Fund】: 国家自然科学基金
【CateGory Index】: P426.51
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1 Yang Jingmei and Qiu Jinhuan (Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029);A Method for Estimating Precipitable Water and Effective Water Vapor Content from Ground Humidity Parameters[J];Chinese Journal of Atmospheric Sciences;2002-01
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