Net Exchange Reformulation of Radiative Transfer in the CO2 15-μm Band on Mars
Net Exchange Reformulation of Radiative Transfer in the CO2 15-μm Band on Mars
复制标题
火星上 CO2 15 μm 波段辐射传输的净交换重构
DOI：
10.1175/jas3537.1
复制
发表时间：
2005
影响因子：
3.1
通讯作者：
Frérédric Hourdin
中科院分区：
文献类型：
--
作者：
J. Dufresne;R. Fournier;Christophe Hourdin;Frérédric Hourdin
净交换公式(NEF)是通常的辐射传递公式的一种替代方法。它是由两位作者在1967年提出的，但到目前为止，这个公式只在极少数情况下用于大气研究。本文的目的是介绍NEF及其主要优势，并以火星为例进行说明。在NEF中，不再考虑辐射通量。基本变量是每对大气层i，j之间的净交换率。NEF提供了辐射交换的有意义的矩阵表示，允许限定对局部加热率的主要贡献，并提供了一个总体框架来建立满足辐射传输的互易性以及热力学第一和第二原理的近似。这可能对开发用于GCM的快速辐射代码非常有用。为火星的GCM提供了一个沿着这些线发展的辐射程序。计算结果表明，计算最重要的运算量是可行的。
Abstract The net exchange formulation (NEF) is an alternative to the usual radiative transfer formulation. It was proposed by two authors in 1967, but until now, this formulation has been used only in a very few cases for atmospheric studies. The aim of this paper is to present the NEF and its main advantages and to illustrate them in the case of planet Mars. In the NEF, the radiative fluxes are no longer considered. The basic variables are the net exchange rates between each pair of atmospheric layers i, j. NEF offers a meaningful matrix representation of radiative exchanges, allows qualification of the dominant contributions to the local heating rates, and provides a general framework to develop approximations satisfying reciprocity of radiative transfer as well as the first and second principles of thermodynamics. This may be very useful to develop fast radiative codes for GCMs. A radiative code developed along those lines is presented for a GCM of Mars. It is shown that computing the most important op...