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

被引：4

作者：

Zhang, Feng ^{[1
]}

Lei, Yadong ^{[1
]}

Yan, Jia-Ren ^{[1
]}

Zhao, Jian-Qi ^{[2
]}

Li, Jiangnan ^{[3
]}

Dai, Qiudan ^{[2
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Joint Int Res Lab Climate & Environm Change,Colla, Nanjing 210044, Jiangsu, Peoples R China

[2] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China

[3] Univ Victoria, Canadian Ctr Climate Modeling & Anal, Victoria, BC, Canada

来源：

ADVANCES IN ATMOSPHERIC SCIENCES | 2017年 / 34卷 / 05期

基金：

中国国家自然科学基金;

关键词：

radiative transfer; canopy; asymmetry factor; Eddington approximation; HARMONIC EXPANSION APPROXIMATION; DOUBLING-ADDING METHOD; 2-STREAM; VEGETATION; SCATTERING; PHOTOSYNTHESIS; SCHEMES; ENERGY; ANGLE;

D O I：

10.1007/s00376-016-6139-2

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

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.

引用

页码：613 / 622

页数：10

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