Variational Iteration Method for Infrared Radiative Transfer in a Scattering Medium

被引：24

作者：

Zhang, Feng ^{[1
,2
,3
]}

Shi, Yi-Ning ^{[2
]}

Li, Jiangnan ^{[4
]}

Wu, Kun ^{[2
]}

Iwabuchi, Hironobu ^{[3
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Minist Educ, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China

[2] Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing, Jiangsu, Peoples R China

[3] Tohoku Univ, Grad Sch Sci, Ctr Atmospher & Ocean Studies, Sendai, Miyagi, Japan

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

来源：

JOURNAL OF THE ATMOSPHERIC SCIENCES | 2017年 / 74卷 / 02期

基金：

中国国家自然科学基金; 日本学术振兴会;

关键词：

MULTIPLE-SCATTERING; LAYERED MEDIA; PARAMETERIZATION; CLOUDS; ALGORITHM; ACCURACY; 2-STREAM; FLUXES;

D O I：

10.1175/JAS-D-16-0172.1

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Anew scheme is proposed for using the variational iteration method (VIM) to solve the problem of infrared radiative transfer in a scattering medium. This scheme allows the zeroth-order solution to be identified as the absorption approximation and the scattering effect is included in the first-order iteration. The upward and downward intensities are calculated separately in VIM, which simplifies the calculation process. By applying VIM to two single-layer scattering media and a full radiation algorithm with gaseous transmission, it is found that VIM is generally more accurate than the discrete-ordinates method (DOM), especially for cirrostratus. Computationally, VIM is slightly faster than DOM in the two-stream case but more than twice as fast in the four-stream case. In view of its high overall accuracy and computational efficiency, VIM is well suited to solving infrared radiative transfer in climate models.

引用

页码：419 / 430

页数：12