Vol. XXV, No. 1 (January–February 2021) Full issue: view (pdf viewer) download (.pdf) CONTENTS FUNDAMENTAL ISSUES OF EARTH’S CRYOSPHERE Galanin A.A. Late Quaternary sand covers of Central Yakutia (Eastern Siberia): structure, facies composition and paleoenvironment significance PHYSICAL AND CHEMICAL PROCESSES IN FROZEN GROUND AND ICE Sosnovsky A.V., Osokin N.I. Estimation of the freezing intensity of the salt water drops in the course of winter sprinkling METHODS OF CRYOSPHERIC RESEARCH Victorov A.S., Orlov T.V., Kapralova V.N., Trapeznikova O.N. Modeling the ways of the morphological pattern development for thermokarst plains with fluvial erosion CHRONICLE Zheleznyak M.N., Zhang R.V., Shepelev V.V., Grigoriev M.N., Fedorov A.N., Alekseeva O.I. The Melnikov Permafrost Institute, Siberian Branch, Russian Academy of Sciences at the turn of its 60th anniversary ADVERTISING Contact and visit us in the Kolyma region for joint research!