Application of polarization lidars to study the orientation of crystalline particles in ice clouds

The article presents the results of studying the horizontal orientation of crystalline particles, carried out using a scanning polarizing lidar LOZA-M3. Several series of measurements of the ice cloud structure in the zenith scan mode were carried out in Tomsk in May-July 2021. The dependence of signal intensity at small tilt angles (up to 5°) reflects the distribution of particle deflection relative to the horizontal plane, and is well described by the exponential dependence. Scanning up to angles of 45-50 degrees showed a high probability of the existence of the corner reflection in ice clouds.