Abstract：The article uses Ka millimeter wave cloud radar data,ground and highaltitude observation data,and adopts echo feature method and physical quantity analysis method to study the echo characteristics during the hail weather process in Weining County,western Guizhou on April 19,2023.The results indicate that the emissivity factor of millimeter wave cloud radar during hail periods below the melting layer is higher than that above the melting layer,with a maximum intensity exceeding 32 dBZ.A higher rainfall intensity will cause a certain attenuation of the radar reflectivity factor,resulting in a "U" shaped gap.The vertical integrated liquid water content during the development stage is 0.10.7 g/m3.During the hail period,the vertical integrated liquid water content below the melting layer height is relatively high,exceeding 1.0 g/m3.In the development stage of cumulus clouds,the atmospheric refractive constant is -132 to -156 dB,and in the mature stage it is -120 to -132 dB.The atmospheric refractive constant reflects the strength of precipitation.Millimeter wave cloud radar can accurately monitor the fluctuation of echo intensity of particles inside cloud clusters,providing important data support for indepth exploration of the macroscopic characteristics of clouds.
柯莉萍, 邹书平, 蔡军, 张欣, 张艳. Ka波段毫米波云雷达在冰雹天气中的应用研究[J]. 气象水文海洋仪器, 2025, 42(5): 10-13.
Ke Liping, Zou Shuping, Cai Jun, Zhang Xin, Zhang Yan. Application research of Ka millimeter wave cloud radar in hail weather. Meteorological Hydrological and Marine Instrument, 2025, 42(5): 10-13.
2025, Vol. 42 
