As a result of the conducted research, the emission of CO from soils of the southern tundra ecosystems of the north-eastern Russian Plain was estimated using the example of the environs of Vorkuta. The soil cover of the studied area is represented by Histic Turbic Cryosol, Histic Reductaquic Glacic Cryosol, Reductaquic Glacic Cryosol and Reductaquic Glacic Cryosol. Atypically high values of CO emission from soils (2.13 ± 0.13 g C/(m day)) are largely due to the weather of the 2022 growing season: high air temperatures and low precipitation. 60% of the variability in the emission value is due to the content of microbial biomass carbon and extractable soil carbon, temperature and soil moisture. High spatial variation in the content of extractable carbon and microbial biomass carbon and parameters of the hydrothermal regime of soils was revealed. The soils were characterized by low values of extractable organic carbon and soil microbial biomass carbon (224 ± 18 and 873 ± 73 mg C / kg soil, respectively). The thickness of the organogenic horizon of the soils determines 72% of the variability in the content of microbial biomass carbon and 79% of the variability in the content of extractable carbon. Systematic measurements of CO emissions from soils of tundra ecosystems of the north-eastern Russian Plain should be given special attention, as this will improve the accuracy of assessing global greenhouse gas flows.
A.A. Bobrik (Wed,) studied this question.