The review is compiled on the basis of the operation results of the system of total ozone (TO) monitoring over Russia and adjoining territories, which functions in operational mode at the Central Aerological Observatory. The monitoring system uses data from the national network equipped with M-124 filter ozonometers under the methodological supervision of the Main Geophysical Observatory. The quality of the functioning of the entire system is operationally controlled based on the OMI satellite equipment observations (NASA, USA). Basic TO observation data are generalized for each month of the third quarter of 2025 and for the entire third quarter. The data of routine observations of surface ozone in the Moscow region are also presented.
Ivanova et al. (Mon,) studied this question.