The temperature characteristics of biological active period of the peat soils of Bakchar swamp

3rd International Conference Environment and Sustainable Development of Territories: Ecological Challenges of the 21st Century

生态环境科学;地球科学;经济学

Kiselev, M.V.^1 ; Dyukarev, E.A.^1 ; Voropay, N.N.^1,2

Institute of Monitoring of Climatic and Ecological System, Siberian Branch, Russian Academy of Sciences, Akademicheskii str., 10/3, Tomsk

634055, Russia^1

V B Sochava Institute of Geography, Siberian Branch, Russian Academy of Sciences, St. Ulan-Bator, 1, Irkutsk

664033, Russia^2

关键词: Annual cycle;    Frozen layer;    Minimum temperatures;    Soil temperature regimes;    Surface temperatures;    Temperature characteristic;    Temperature regimes;    Western siberia;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/107/1/012032/pdf
DOI  :  10.1088/1755-1315/107/1/012032

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The results of the study of the peculiarities of the temperature regime in the five basic ecosystems of oligotrophic bogs in the south taiga zone of Western Siberia in 2011-2016 are presented. The soil temperature regime was studied using the atmospheric-soil measuring complex at different depths from surface to 240 cm. All sites were divided into two groups according the bog water level: flooded sites (hollow and open fen) and drained sites (ridge, tall and low ryam). Waterlogged sites are better warmed in the summer period, and slowly freeze in the winter period. The analysis of the annual cycle of temperature showed that the maximum surface temperature is observed in July. The minimum temperature on the surface observed in February or January. The greatest temperature gradient was recorded in the upper 2 cm layer. The gradient at the open fen was -2 °C•cm-1in February and 1.1 °C•cm-1in October. The peak of formation of the seasonally frozen layer occurs at the end of autumn, beginning of winter. The degradation of the seasonally frozen layer was observed both from top and bottom, but degradation from the top is faster.