降水层状水云的光学特性及其参数化

本文根据Mie散射理论计算了分别由7种不同谱分布构成的四种降水层状水云的单次散射反照率、不对称因子和削弱系数,给出它们的参数化公式,考虑的波长范围是0.3μm～4.7μm的太阳辐射。对光学厚度参数化公式用Stephons的列表数据进行了检验,结果表明拟合精度很高。

OPTICAL PROPERTIES OF PRECIPITATING LAYER WATER CLOUDS

In this paper, the three important single scattering parameters, i. e. the single scattering albedo, the asymmetry factor and the extinction coefficient are computed accordingg to Mie theory for the four kinds of precipitating layer water clouds, which are composed of seven different droplet size distributions respectively, the accounting solar radiation wavelength range is from 0. 3 nm to 4. 7um. The parameterization formulas are proposed for the mean spectrum single albedo, asymmtry factor, and optical depth of precipitating layer water clouds respectively. The parameterization formula for optical depth is checked by Stephens' tabular data. The results indicate that its fitting degree of accuracy is very high.