STRATOSPHERIC AEROSOL-SIZE DISTRIBUTIONS FROM MULTISPECTRAL LIDAR MEASUREMENTS AT SODANKYLA DURING EASOE

Multispectral lidar data measured at Sodankyla (67-degrees-N, 26-degre es-E), have been used to characterize stratospheric aerosols. Using de polarization measurements, particles have been classified into PSC and volcanic aerosols. While Pinatubo aerosol could be observed inside th e polar vortex from the beginning of the campaign, only few PSC events have been observed. For Pinatubo aerosol lognormal size distribution parameters have been retrieved, indicating particle distributions with 0.1 mum to 0.3 mum median-radius between 17 and 22 km and up to 0.7 m um below. Height resolved size distribution parameters and aerosol sur face areas are given.