THERMAL REGIME OF PEAT DEPOSITS OF PALSAS AND HOLLOWS OF PEAT PLATEAUS IN WESTERN SIBERIA
N.G. Koronatova1, N.P. Mironycheva-Tokareva1, Ya.R. Solomin2
1Institute of Soil Science and Agrochemistry, SB RAS, 8/2, Akad. Lavrent’ev ave., Novosibirsk, 630090, Russia
coronat@mail.ru
2Yugra State University, 16, Chekhova str., Khanty-Mansiysk, Khanty-Mansiysk Autonomous okrug-Yugra, 628012, Russia
Keywords: Температурный режим торфяной залежи, плоскобугристое болото, бугор, топь, криолитозона, Западная Сибирь, Thermal regime of peat deposit, peat plateau, palsa, bog, permafrost, Western Siberia
Abstract
The study has been focused on the thermal regime of peat soils (fibrist histosols) of palsa bogs and peat plateaus in northern West Siberia. Autonomous loggers recorded temperature for 343 days every hour to a depth up to 60 cm in palsas and 120 cm in hollows (pools, lawns) in four mire ecosystems: the forest tundra hollow and palsa, and the northern taiga hollow and palsa. The data on the mean daily temperature, the mean annual temperature, the extremes, the annual amplitude, the active layer dynamics, the sums of positive and negative temperatures at different depths have been adduced. The established differences in the thermal regimes of soils were due to the differences in the ecosystems of mires, rather than in bioclimatic zones they belong to. The high-latitude mires have the largest impact on the annual amplitude and temperature parameters obtained for the cold period.
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