Retrieval of Optical and Microphysical Characteristics of Postvolcanic Stratospheric Aerosol from the Results of Three Frequency Lidar Sensing

摘要

A method is developed for retrieving the altitude profiles of optical and microphysical parameters (MPPs) of postvolcanic stratospheric aerosol (SA) from atmospheric remote sensing data at wavelengths of 355, 532 and 1064 nm. The method uses robust multiple regressions between optical SA characteristics derived from the statistical optical–microphysical SA model to retrieve the profiles of the aerosol backscat tering coefficient (ABSC) at the mentioned wavelengths. The inverse problem is solved using polynomial multiple regressions between aerosol integral MPPs and spectral ABSC values. Agreement with independent experimental data confirms the reliability of the derived regressions. We present the results of numerical experiments on retrieving ABSC and aerosol MPP profiles corresponding to different states of the postvolca nic stratosphere.