Reliability validation and results analysis of polarization-Mie lidar for atmospheric sounding

A new polarization-Mie lidar(PML) used for detecting extinction and polarization characteristic of aerosol and cirrus is described.Three methods for validate reliability of PML are presented.Firstly,the main performance parameters of PML itself are determined.Secondly,the comparison experiments between PML and homogeneous lidar are completed.Finally,aerosol optical depth compared between PML and solar radiometer are finished.The validation results show that PML is steady and reliable.The detected results of depolarization ratio for cirrus over Hefei from February to May in 2007 are also presented and discussed.The cirrus is generally present in the altitude from 7km to 12km,and the depolarization ratio varies from 0.2 to 0.5 with average 0.36±0.06.At the meanwhile,depolarization ratio appears a climbing tendency with the increased height.