A New Parameterization of Canopy Radiative Transfer for Land Surface Radiation Models

作     者：Feng ZHANG Yadong LEI Jia-Ren YAN Jian-Qi ZHAO Jiangnan LI Qiudan DAI 

作者机构：Key Laboratory of Meteorological DisasterMinistry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisasterNanjing University of Information Science & Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid DynamicsInstitute of Atmospheric PhysicsChinese Academy of Sciences Canadian Center for Climate Modeling and AnalysisUniversity of Victoria 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2017年第34卷第5期

页      面：613-622页

核心收录：

学科分类：07[理学] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.41305004,41675003 and 91537213) the PAPD (Priority Academic Program Development) of Jiangsu Higher Education Institutions 

主　　题：radiative transfer canopy asymmetry factor Eddington approximation 

摘      要：A new parameterization of canopy asymmetry factor on phase function,which is dependent on the leaf normal distribution and leaf reflection/transmission,is derived. This new parameterization is much more accurate than the existing scheme. In addition,the new solutions for both the diffuse and direct radiation can be obtained using the Eddington approximation. It is found that the direct radiation can be described as a function of the diffuse radiation. This new approach offers a substantial improvement in accuracy,as compared with the hemispheric constant method,for both isotropic and anisotropic cases. Given the analytical nature of the solution and its high accuracy,we recommend the new parameterization for application in land surface radiation modeling.