TY CONF TI DYNAMICS OF CHANGES IN THE STRATOSPHERIC AEROSOL LAYER IN THE PERIOD FROM 2018 TO 2025 OVER TOMSK KW remote sensing KW lidar KW stratospheric aerosol JO The XXXI International Symposium "Atmospheric and Ocean Optics. Atmospheric Physics" AU Makeev, A.P. AU Nevzorov, A.V. AU Dolgiy, S.I. AU Sal'nikova, N.S. PY 2025 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences