采用离散纵标法(DISORT)耦合大气分子吸收散射，考虑地表的热辐射以及地表反射，模拟计算了卷云大气的反射率以及透过率。研究了在红外波段卷云的光学厚度、有效尺寸及不同大气模式等因素对于辐射特性的影响。结果表明，卷云大气反射率受地表热发射的影响很大，且随卷云光学厚度增大减小。大气模式对于卷云大气辐射传输特性影响显著，比较而言，卷云的粒子尺寸影响较小。

The reflective and transmittance characteristics of the cirrus atmosphere with considering the thermal radiation and reflectance of the earth surface have been simulated and calculated by using Discrete Ordinate Radiative Transfer method(DISORT)to couple atmospheric molecular absorption and scattering. The influence of the cirrus optical thickness, particle effective radius, surface thermal emission and different atmospheric models to cirrus radiation characteristics have also been discussed in the infrared band. The results show that the cirrus radiation characteristics are strongly influenced by surface thermal emission and atmospheric model. The reflectance of cirrus decreases with the increase of the optical thickness, but barely changes with particle effective radius.