The review is compiled based on the operation results of the system of total ozone (TO) monitoring for Russia and neighboring territories that 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 system functioning is operationally controlled using the OMI satellite equipment observations (NASA, USA). Basic TO observation data are generalized for every month of the fourth quarter of 2025, for the fourth quarter, and for the whole year. Data of routine observations of surface ozone in the Moscow region are also presented.
Ivanova et al. (Sun,) studied this question.