An algorithm to determine cirrus properties from analysis of multiple-scatterimg influence on lidar signal

A Monte Carlo simulation of the multiple-scattering influence on ground-based Raman lidar measurements is presented. An iterative procedure is introduced in order to implement Monte Carlo simulation from experiment result. Our results show that for the typical cirrus cloud, the presence of the multiple scattering can lead to an underestimation of the extinction coefficient as large as 200% whereas the backscattering coefficient is almost unaffected. From the comparison of corrected lidar ratio and the phase function, used in Monte Carlo simulation, the shape and size of scattering particle can be estimated.