Fig. 1. The backscattering（a, b） and attenuation cross sections（c, d） of non-spherical ice crystals to 340 GHz wave

Fig. 2. The change of the radar reflectivity factor （Z_e） of ice-crystal clouds with the median dimension （D_m） （a₁、a₂、a₃）and IWC（b₁、b₂、b₃）

Fig. 3. （a） The attenuation coefficient of ice-crystal cloudand, and （b） the ratio of attenuation coefficients of two frequency bands

Fig. 4. The change of the equivalent radar reflectivity factor （Z_e） with the ice water content （IWC） and D_m

Fig. 5. The changes of dual wavelength reflectivity ratio （DWR） with the D_mand IWC

Fig. 6. The DWR based on the Baum volume scattering model

Fig. 7. h=5∼7 km, （a）the vertical profiles of the water content, （b）the equivalent radar reflectivity factors and the radar reflectivity factor after attenuation from 340 cloud radar, and （c） the DWR