This work was supported by the Russian Foundation for Basic Research, project no. 18–55–11005 АF_t, “Mechanisms, Trajectories, and Patchiness of Changes in Arctic Ecosystems Caused by Climate Warming (ClimEco),” project no. 18–05–60222 Arctic, “Cryogenic Relief-Forming Processes in the Arctic Plains with Massive Ground Ice under Modern Climatic Fluctuations along the Kara Sub-Latitudinal Transect” and project no. 19-45-890011, “Assessment of Polygonal Peatlands’ Sustainability to the Anthropogenic Impact under Climate Change in the Northern Part of the Pur-Taz Interfluve.”