Earth`s Cryosphere, 2019, Vol. XXIII, № 4, p. 3-12
SEASONALLY FROZEN LAYER OF PEATLANDS IN THE SOUTHERN
TAIGA ZONE OF WESTERN SIBERIA
M.V. Kiselev1, E.A. Dyukarev1,2, N.N. Voropay1,3
1 Institute of Monitoring of Climatic and Ecological Systems, SB RAS,
10/3, Akademicheskii ave., Tomsk, 634055, Russia; dekot@mail.ru
2 Yugra State University, 16, Chekhova str., Khanty-Mansiysk, 628012, Russia
3 Sochava Institute of Geography, SB RAS, 1, Ulan-Batorskaya str., Irkutsk, 664033, Russia
This paper presents results of the 2011–2017 field studies of the thickness of seasonally frozen layer and the temperature regime of peat soils of oligotrophic bogs in the southern taiga zone of Western Siberia. The experimental observations have been carried out using the atmosphere-soil measurement system at different depths from the surface down to 240 cm. The five study sites (plots) included: a hollow and ridge at the ridge-hollow bog complex, open fen, high ryam and low ryam. The analysis result has revealed significant differences in the temperature regime of peat soils and the depth of seasonal freezing at plots with high and low levels of bog waters. The proposed regression model allows to predict the maximum depth of seasonal freezing, using the data on maximum snowpack height and winter mean air temperature.
Peatland ecosystems, microclimate, soil temperature regime, seasonally frozen layer, freezing depth, snowpack, Western Siberia