О. О. Rybak, R. Satylkanov, Е. А. Rybak, А. S. Gubanov,
I. A. Korneva, and K. Tanaka

Parameterization of Short-wave Solar Irradiance for Glaciological Applications

5

E. V. Vol’pert and N. E. Chubarova

Long-term Changes in Solar Radiation in Northern Eurasia during the Warm Season According to Measurements and Reconstruction Model

 

21

A. V. Kholoptsev, S. A. Podporin, and V. A. Safonov

Variations in the Kara Sea Level, Their Steric Factors, and Solar Radiation during 1993–2018

 

38

I. N. Kuznetsova, Yu. V. Tkacheva, I. Yu. Shalygina, and E. A. Lezina

Calculation of Air Quality Index and Assessment of Its Informativeness for Russia Based on Monitoring Data for Moscow

 

53

O. M. Potyutko

Assessment of Ecological State of Water Bodies Using Integral Hydrobiological and Hydrochemical Indicators

 

66

L. V. Golovatyuk and R. A. Mikhailov

Hydrochemical State of Rivers in the Semi-desert Zone of the East European Plain (the Eruslan River basin, the Lower Volga)

 

75

A. V. Soromotin, I. N. Ezau, O. S. Sizov, S. A. Lobotrosova,
and K. A. Frank

Microclimatic Features of Sand Dunes in Northern Taiga in Western Siberia

 

88

COMMUNICATIONS

R. Feng

How China Attempts to Vanquish Air Pollution in the 21st Century

 

101

INSTRUMENTS, OBSERVATIONS, AND PROCESSING

A. A. Sin’kevich, B. Boe, S. Pawar, Yu. P. Mikhailovskii,
A. B. Kurov, and V. Gopalakrishnan

Investigation of Radar and Electrical Characteristics of Thunderclouds Seeded with a Glaciogenic Reagent in Karnataka, India

 

112

REVIEWS AND CONSULTATIONS

E. S. Dmitrevskaya, T. A. Krasil’nikova, and O. A. Markova

Environmental Pollution and Radiation Situation on the Russian Federation Territory in May 2021

 

123

N. Yu. Anan’eva, A. D. Golubev, and L. N. Parshina

Weather and Anomalous Hydrometeorological Phenomena on the Russian Federation Territory in May 2021

 

130

N. S. Ivanova, I. N. Kuznetsova, and E. A. Lezina

Ozone Content over the Russian Federation in the Second Quarter of 2021

 

135

CHRONICLES

50 Year to Siberian Regional Research Hydrometeorological Institute

142

Congratulations on Anniversaries

143

A. V. Tsyban’ (1938–2021)

144

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