ACTIVE-LAYER DYNAMICS IN WEST SIBERIA
E. S. Melnikov, A. A. Vasiliev, M. O. Leibman, N. G. Moskalenko
Earth Cryosphere Institute SB RAS, 625000, Tyumen, P/O box 1230, Russia
Keywords: Active-layer monitoring, climate fluctuations, landscapes, West Siberian cryolithozone
Pages: 23-32
Abstract
The Earth Cryosphere Institute of the Russian Academy of Sciences, Siberian Branch, undertook studies in West Siberia within the framework of Circumpolar Active-Layer Monitoring (CALM) International Program. The paper summarizes the results of active-layer monitoring that started in early 1970-s at profiles and grids, to which CALM sites were added in 1990-s. The results obtained at the CALM sites and the previously established grids and profiles allow estimating the main tendencies in the active-layer dynamics in different landscapes of two bio-climatic zones (tundra and taiga) under climate fluctuations. It is established that: climatic trends are not evident in tundra and low in taiga; active-layer fluctuations in general follow the climate changes; there are variations in response of different landscapes to climate changes; atmospheric precipitation plays an important role in active-layer annual fluctuations.
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