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The goal of this study is to reveal the impact of climate warming on vegetation and permafrost in ecosystems of West Siberia permafrost zone. Changes of various ecosystem components—microrelief, vegetation and soil covers, active layer thickness, soil and permafrost temperature, exogenous geological processes—are investigated. The impact of increase of air temperature and the amount of atmospheric precipitation on the development of northern taiga ecosystems is monitored. Results of ecosystem changes under the impact of climatic changes are presented.The ecosystems are detected, in which the local permafrost temperature decrease caused by dynamics of vegetation cover observed on a background of the general tendency of temperature increase.
The nonlinear propagation of
dust-acoustic (DA) shock waves in three-component unmagnetized dusty plasma
consisting of nonextensive electrons, Maxwellian ions and arbitrarily charged mobile
dust grain has been investigated. It is found that the presence of q-nonextensive
electrons and ions can change the nonlinear behavior of shock wave. The
standard reductive perturbation method is employed to study the basic features
(phase speed, amplitude and width) of DA shock waves (DASWs) which are
significantly modified by the presence of Maxwellian ions and nonextensive
electrons. The present investigation can be very effective for understanding
the nonlinear characteristics of the DASWs in space and laboratory dusty plasmas.