Ya. A. Virolainen and Yu. M. Timofeev

Remote Sensing of Atmospheric Ozone. 1. Ground-based Methods.

5

Yu. M. Timofeev, A. V. Polyakov, and Ya. A. Virolainen

Remote Sensing of Atmospheric Ozone. 2. Satellite Methods

Yu. M. Timofeev, A. V. Polyakov, L. S. Kramareva, V. D. Bloshchinskii,
G. M. Nerobelov, P. M. Nerobelov, A. A. Filei, Yu. A. Shamilova,
A. V. Boroditskaya, Ya. A. Virolainen, Yu. I. Bordovskaya, and G. V. Kobzar’

Comparison of Atmospheric Total Ozone Estimated from Arktika-M High-elliptical Satellite Data with Ground-based Observations and Independent Satellite Measurements

43

N. S. Ivanova

Total Ozone Trends in High Latitudes over Russia in Warm Seasons

54

N. S. Ivanova

Solar Activity and Polar Ozone

62

Yu. E. Belikov, S. V. Dyshlevsky, S. Sh. Nikolayshvili, and A. Yu. Repin

Photochemical Reactions and Catalytic Cycles of Ozone Destruction Involving Charged Particles in the Polar Stratosphere

73

N. V. Balugin, V. A. Yushkov, A. Ya. Sukhanov, V. N. Marichev, and D. A. Bochkovskii

Determination of Microphysical Characteristics of Stratospheric Aerosols from the Results of the Multiwave Lidar and Balloon Experiment

86

V. I. Grigor’evskii and Ya. A. Tezadov

Measurements of Surface Absolute Air Humidity and Atmospheric Moisture Content Using a Solar Photometer in the 1651–1653 nm Range

97

V. M. Bykov and N. V. Klimovskii

Peculiarities of Distribution of Nutrients in the Northern Dvina Mouth Area according to Long-term Monitoring

104

V. A. Vorob’ev and F. A. Andreev

Applying Gamma Methods for Remote Monitoring of Snow Water Equivalent Using Unmanned Aerial Vehicles

115

E. S. Dmitrevskaya

Environmental Pollution and Radiation Situation on the Russian Federation Territory in April 2025

124

E. S. Dmitrevskaya

Environmental Pollution and Radiation Situation on the Russian Federation Territory in May 2025

127

L. N. Parshina

Weather on the Russian Federation Territory in April 2025

130

V. I. Zakharenkova

Weather on the Russian Federation Territory in May 2025

132

B. A. Birman, A. D. Golubev, L. N. Parshina, and K. A. Sumerova

Anomalous Hydrometeorological Phenomena on the Russian Federation Territory in April 2025

133

B. A. Birman, A. D. Golubev, L. N. Parshina, and K. A. Sumerova

Anomalous Hydrometeorological Phenomena on the Russian Federation Territory in May 2025

136

T. M. Dmitrieva, A. V. Klepikov, and A. I. Gusev

WMO Integrated Processing and Prediction System

139

In Memory of G. A. Kokin (1925–2004)

143

I. I. Mokhov (1950–2025)

144