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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Characteristics of cryogenic soils along the latitudinal transect in the northwestern Siberia, Russiaтезисы доклада
- Авторы: Matyshak G.V., Walker D.A., Epstein H.E., Leibman M.O., Moskalenko N.G., Orekhov P.T., Frost G.V., Goncharova O.U., Bobrik A.A.
- Сборник: Arctic Summit Science Week 2017: "A Dynamic Arctic in Global Change"
- Тезисы
- Год издания: 2017
- Место издания: CZECH-IN Prague, Czech Republic
- Первая страница: 140
- Последняя страница: 141
- Аннотация: The Russian permafrost affected soils cover more than 65% of the total territory. Though the area of cryogenic soils is only about 16% of the total soil area, they store 50% of the soil organic carbon in the upper meter. At the same time their properties are very different in different landscape zones and in different parts of Siberia. So it is particularly important to study the cryogenic soils and the relationship it with temperature, active-layer thickness, vegetation, soil texture. Here we present a synthesis of the soil information relevant to permafrost, plants and parent material along the Eurasia Arctic Transect (EAT). During the 4 years (usually in August) we have studied the soil cover of 4 landscape areas (forest-tundra, tundra, arctic desert) along the EAT. Soil pits were described and soil samples were collected from 6 locations at a distance of more than 1500km. All locations had representative key sites on zonal loamy or sandy parent material and soils investigations covered complete cycle of the surface cryogenic microrelief patterns. We also measured in the field the active-layer thickness, soil moisture and temperature and CO2 fluxes. In the lab we analyzed soil chemical and physical properties. In general soils of EAT is similar and support moist acidic conditions. Most of soils characterized by well drained, weak texture and low organic matter content. Largely the soil properties determined by climate, the parent material and cryogenic processes. Most soils have strongly developed cryogenic features, including warped, broken and distorted soil horizons due the intense cryoturbation. They have a small thickness of the organic horizons (< 40 cm) and a low biological activity (CO2 emission <150 mg / m2 / h). The differences between soils are due to local conditions, cryogenic processes and the decrease the intensity of soil processes from south to north.
- Добавил в систему: Матышак Георгий Валерьевич