THERMAL SCIENCE

International Scientific Journal

Roman Desyatkin

,

Alexander Fedorov

,

Alexey Desyatkin

,

Pavel Konstantinov

AIR TEMPERATURE CHANGES AND THEIR IMPACT ON PERMAFROST ECOSYSTEMS IN EASTERN SIBERIA

ABSTRACT
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.
KEYWORDS
air temperature, global warming, permafrost ecosystem, permafrost landscape, Eastern Siberia
PAPER SUBMITTED: 2015-03-20
PAPER REVISED: 2015-06-01
PAPER ACCEPTED: 2015-07-03
PUBLISHED ONLINE: 2015-07-03
DOI REFERENCE: https://doi.org/10.2298/TSCI150320102D
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Supplement 2, PAGES [S351 - S360]
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Air temperature changes and their impact on permafrost ecosystems in eastern Siberia

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence