Temperature dynamics in sandy and loamy forest-tundra soils of the Polar Urals in relation to climate change

摘要

Long-term data on soil temperatures in the forest-tundra zone of the Polar Urals indicate that each soil is characterized by particular norms of the annual and seasonal climatic parameters. The modern warming of the climate is accompanied by the less pronounced soil cooling during the cold season and longer preservation of heat reserves accumulated in the warm season. The soil freezing takes place later and the soil thawing occurs earlier, so the thawed state of the soils is observed for a longer period. The depth of the seasonal soil freezing and the sum of the accumulated zero and subzero temperatures in the soils have decreased, whereas the sum of accumulated above-zero soil temperatures has increased.