gesjGEOGRAPHY, ENVIRONMENT, SUSTAINABILITYGEOGRAPHY, ENVIRONMENT, SUSTAINABILITY2071-93882542-1565Russian Geographical Society10.24057/2071-9388-2021-073gesj-2179Research ArticleSpecial Issue "Permafrost regions in transition"Active Layer Dynamics Near Norilsk, Taimyr Peninsula, RussiaGrebenetsValery I.

Department of Cryolithology and Glaciology, Geographic Faculty

Leninskiye Gory 1, Moscow, 119991

TolmanovVasily A.

Department of Cryolithology and Glaciology, Geographic Faculty

Leninskiye Gory 1, Moscow, 119991

vasiliytolmanov@gmail.comStreletskiyDmitry A.

Department of Geography

2036 H Street, Washington, DC 20052

Lomonosov Moscow State UniversityRussian FederationThe George Washington UniversityUnited States2021281220211445566Copyright © Grebenets V.I., Tolmanov V.A., Streletskiy D.A., 20212021Grebenets V.I., Tolmanov V.A., Streletskiy D.A.Grebenets V.I., Tolmanov V.A., Streletskiy D.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ges.rgo.ru/jour/article/view/2179

This paper provides information on active layer thickness (ALT) dynamics, or seasonal thawing above permafrost, from a Circumpolar Active Layer Monitoring (CALM) site near the city of Norilsk on the Taimyr Peninsula (north-central Siberia) and the influences of meteorological and landscape properties on these dynamics under a warming climate, from 2005 to 2020. The average ALT in loamy soils at this 1 ha CALM site over the past 16 years was 96 cm, higher than previous studies from 1980s conducted at the same location, which estimated ALT to be 80 cm. Increasing mean annual air temperatures in Norilsk correspond with the average ALT increasing trend of 1 cm/year for the observation period. Active layer development depends on summer thermal and precipitation regimes, time of snowmelt, micro-landscape conditions, the cryogenic structure (ice content) of soils, soil water content leading up to the freezing period, drainage, and other factors. Differences in ALT, within various micro landscape conditions can reach 200% in each of the observation periods.

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The authors declare that there are no conflicts of interest present.