Distribution of the current mean January and mean winter temperatures near the places of determination of the isotopic composition of ice wedge veinlets for three periods: a) from 1930 to 1966, b) from 1967 to 2000, c) from 2001 to 2019 (after Vasilchuk, 1992 for the period 1930-1966). The values δ¹⁸O veinlets for the period of 1930-1966 years were used.
Funding was received from the Russian Science Foundation (Award nr. 19-17-00126, field studies and isotope analysis) and the Russian Foundation for Basic Research (Award nr. 18-05-60272, methodology of the study and calculations).