The intensive polar stratospheric vortex in the Arctic that shifted to northern Europe in the winter of 2019–2020 caused low temperatures and the frequent occurrence of polar stratospheric clouds followed by a significant decrease in the total ozone content. Polarimetry and multi-color photometry using all-sky cameras in Lovozero (Murmansk Region, Russia, 68.0°N, 35.1°E) together with a new method of cloud field separation against the twilight background allowed for finding the light scattering characteristics related to the particle size distribution of polar stratospheric clouds. The results are compared with lidar and balloon experiments. The conditions of the appearance of visually bright polar stratospheric clouds of type I are discussed.

北极极地平流层强烈的涡流于2019–2020年冬季移至北欧，造成了低温，极地平流层云层的频繁发生，继而使总臭氧含量显着下降。使用洛沃泽罗（俄罗斯摩尔曼斯克州，68.0°N，35.1°E）的全天候相机进行的偏振和多色光度法，以及在暮色背景下进行云场分离的新方法，可以找到与光散射相关的光散射特性。极平流层云的粒径分布。将结果与激光雷达和气球实验进行比较。讨论了视觉上明亮的I型极地平流层云的出现条件。