A STUDY OF THE RELATION BETWEEN RAININESS, EXTINCTION OF RAIN CLOUD AND PARAMETERS MEASURED BY A DUAL LINEAR POLARIZATION RADAR
Cai Qiming Xu Baoxiang Liu Liping (Lanzhou Institute of Plateau Atmospheric Physics, Academia Sinica)
Aimed at developing a dual linear polarization radar, we have calculated backscattering, extinction and absorbing cross sections of oblate spheroidal raindrops by using the extended boundary condition method. The scattering intensities and the differential reflectivities (Z DR) for different hydrometeors with any spectral parameters have been obtained. We have also given the relationships between rain rates, extinction coefficients and the parameters measured by the dual linear polarization radar. This work has laid the foundation of quantitative measurement of rain rate and the discussion of extinction properties of radar wave in rain clouds.