Polar Stratospheric Cloud Measurements by Multispectral Lidar at Sodankyla in Winter 1994/95

Lidar measurements at 4 wavelengths and two polarizations were performed during the SESAME campaign in Sodankyla, Finland (67.37N, 26.65E). Using the wavelength dependence of the particle scattering the aerosol size distribution and the refractive index of the PSC particles were retrieved. A liquid PSC with a refractive index of 1.36 could be observed. We assume that this PSC consists of ternary solution particles in contradiction to the NAT-hypothesis.