International Scientific Journal


Significant increasing of mean annual air temperatures, freezing index and thawing index - have exerted a considerable impact on the state of permafrost landscapes and ecosystems in Eastern Siberia on the last few decades. Many animals and plants have shifted their ranges and this may be the precursor of northward shifts of the landscape zones. Landscapes that contain ground ice bodies in the underlying permafrost are especially sensitive to climate warming. Increase of mean annual air temperature for 2-3°C over the last three decades has resulted an increase in ground temperature by 0.4-1.3°C in the upper part of permafrost, which in turn has led intensification of negative cryogenic processes. Previous year’s measurements of greenhouses gases emission in the Middle Taiga forest of central Yakutia were found to show high values and spatial variability. The wet meadow soils and shallow lakes have highest methane fluxes, almost comparable with emissions from tropical peatlands. Permafrost ecosystems respond to global warming quite rapidly. This makes the study of their changes somewhat easier, but still requires meticulous attention to observations, research, and analysis of the processes under way.
PAPER REVISED: 2015-06-01
PAPER ACCEPTED: 2015-07-03
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THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Supplement 2, PAGES [S351 - S360]
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