摘要
为了用双线偏振雷达识别降水粒子相态的需要,本文用研究不均匀物体散射特性的扩展边界条件法计算了不同相态下扁椭球、锥状模式雹块的后向散射截面、衰减截面及吸收截面,得到了这些模式雹块的Z_(DR),Z_H值及对5.6cm波长雷达波的衰减特点,为实际观测冰雹的存在提供了依据。
In order to distinguish the different phases of hydrometeors by using a dual-linear polarization radar, in this work we have calculated the backscattering, extinction and absorption cross sections of oblate spheroidal and conical model hails with different phases by using the extended boundary condition method for an inhomogeneous body.We have got the ZDR and ZH values of these model hails and their extinction properties at 5.6 cm wavelength.This work has provided an operational approach to identify hail by using radar.
出处
《高原气象》
CSCD
北大核心
1991年第1期26-33,共8页
Plateau Meteorology
基金
国家自然科学基金资助项目
关键词
冰雹
雹块
观测
雷达波
不同相态
Backscattering cross section
Extinction cross section
Differential reflectivity Z_(DR)
