Tendencies in current climate change and atmospheric circulation variability in the Arctic region of West Siberia

Authors Name:   

Elena V. Kharyutkina, Sergey V. Loginov

Journal: Czech Polar Reports
Issue: 7
Volume: 2
Page Range: 311-320
No. of Pages: 10
Year: 2017


Publishers: muniPress Masaryk University Brno
ISSN:    1805-0689 (Print), 1805-0697 (On-line)
Language: English

The main goal of this study is to carry out the investigation of the climatic parameters variability and the role of global atmospheric circulation in their trends over the Arctic region of West Siberia (60-70°N, 60-90°E) using reanalysis data.  The characteristics of spatial and temporal variability of meteorological parameters (surface air temperature and soil temperature, atmospheric pressure, snow depth and surface albedo) were calculated using ERA-Interim reanalysis data over the period of 1979−2015. It was established that in the beginning of XXI century, there is an air and soil temperature decrease in winter and autumn and its statistically significant increase in spring and summer. The tendency to permafrost area degradation is observed for the Arctic region. The maximal changes are observed in low-temperature permafrost soils than in soils with higher temperature. This trend is accompanied by the decrease in snow cover depth and surface albedo. Global circulation indices variability, its relationships with meteorological parameters in West Siberia and with sea ice cover extent in the Arctic Seas indicate that atmospheric blocking processes, which are responsible for anticyclonic type of weather, were developed in the region during last decades.


Keywords: air temperature, soil temperature, circulation indices, permafrost


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Notes: ASSW