云的红外辐射模型综述

Overview of infrared radiation models for cloud

介绍了云的分类和组成,以及云的红外辐射模型(包括二流近似、灰体近似和黑体近似模型),测量了云的红外光谱辐射。分析表明:二流近似模型可用于云层对太阳和大气中红外波段的反射、透射和云自身的辐射。黑体近似模型和灰体近似模型主要用于对云层较粗略的估算,灰体模型可近似描述8～12μm波段的辐射,且形式上比较简单,是一种常用的简化模型。

It is introduced that the classification, compositions, as well as the infrared radiation models of the clouds, including the twostream approximation model, the blackbody approximation model and the grey body approximation model. The infrared spectrum radiation of some cloud types was measured. The results of analysis indicate that twostream approximation model can be used to calculate the cloud reflectivity and transmissivity of the infrared wavebands from the sun and air, and the radiation from the clouds themselves. Both the blackbody and the gray body models are primarily used to evaluate the clouds approximately. The gray body model can describe approximately the radiation in 8～12μm wave bands, and is rather easy in form and so is a simplified model commonly used.