Earth’s Cryosphere, 2025, Vol. XXIX, No. 1, p. 22-31.
GEOLOGICAL CRYOGENIC PROCESSES AND FORMATIONS
PARAGENESIS OF DEGRADATION AND AGGRADATION PROCESSES IN FROZEN GROUND
F.M. Rivkin1,*, S.N. Buldovich2, D.A. Kaverin3
1 Earth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch of the Russian Academy of Sciences, Malygina St. 86, Tyumen, 625026 Russia
2 Lomonosov Moscow State University, Faculty of Geology, Leninskie Gory 1, Moscow, 119991 Russia
3 Institute of Biology, Komi Science Centre, Ural Branch of the Russian Academy of Sciences, Kommunisticheskaya St. 28, Syktyvkar, 167982 Russia
*Corresponding author; e-mail: f-rivkin@narod.ru
The regularities of the new formation of frozen ground near the southern boundary of permafrost against the background of a positive climate trend and permafrost degradation are considered. New formation of permafrost against the background of long-term thawing of frozen ground is considered as a paragenetic processes. The spatial heterogeneity of frost heaving and thawing of soils leads to the formation of local irregularities within initially flat hydromorphic areas, where conditions become favorable for the new formation of frozen ground. Even minor altitudinal differentiation of the original surface (0.05–0.20 m) can lead to a radical change in geocryological conditions and formation of fairly low-temperature permafrost. Thus, new formation of frozen ground can take place against the background of general climate warming and permafrost degradation.
Keywords: permafrost, deep position of a permafrost table, frozen ground thaw subsidence, aggradation of frozen ground, perennial ground freezing, frost heaving.
Recommended citation: Rivkin F.M., Buldovich S.N., Kaverin D.A., 2025. Paragenesis of degradation and aggradation processes in frozen ground. Earth’s Cryosphere XXIX (1), 22–31.
Received June 26, 2024
Revised August 8, 2024
Accepted November 28, 2024
Translated by Yu.A. Dvornikov