TY CONF TI ON THE ORIGIN OF ATMOSPHERIC OSCILLATIONS WITH PERIODS OF 27.32 AND 13.78 DAYS KW atmosphere KW solar indices KW atmospheric oscillations JO The XXXI International Symposium "Atmospheric and Ocean Optics. Atmospheric Physics" AU Percev, N.N. AU Dalin, P.A. AU Perminov, V.I. PY 2025 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences