RETRIEVAL OF RAINDROP SIZE DISTRIBUTION USING C-BAND POLARIMETRIC RADAR MEASUREMENTS

摘要

The radar measurements Z_(HH), Z_(DR), K_(DP), and an empirical N_0 -μ relation were utilized to retrieve the modified gamma DSD parameters. The basic concept of the retrieval method is to minimize sum of variances between the theoretical and observed polarimetric radar measurements. An empirical N_0 -μ relation was added as a constraint that adjust the retrieved N_0 and μ to the empirical relation. It is thought that the retrieval method presented in this study is an useful one for retrieval of the gamma DSD parameters from radar measurements. In the further, we have a plan to analyze the microphysical processes in the topical precipitation systems based on the estimation of the DSD parameters.