Large-Scale Atmospheric Circulation over Siberia by Data from Surface Synoptic Maps and Reanalysis
https://doi.org/10.15356/0373-2444-2015-3-94-99
Abstract
The results of the comparative analysis of the characteristics of pressure centers which influenced the weather in Siberia in 1976–2011 according to the surface synoptic maps and maps constructed using NCEP/DOE AMIP II reanalysis are presented. The area of study was limited by 50–70°N, 60–110°E. Such characteristics as number of cyclones and anticyclones, pressure in their centers, pressure gradient, duration of live are investigated. It is found that reanalysis data represent the qualitative picture of the temporal variability of pressure centers quite correctly. In the second half of the studied period cyclones have become less deep and anticyclones have become less intensive. The average value of the pressure gradient of pressure centers obtained using surface synoptic maps is less than that obtained using reanalysis data by factor of two or three. Average long-term duration of the impact on the territory of the pressure centers using the surface synoptic maps and reanalysis data is almost the same. In general, for Siberia over the period of 1976–2011, according to surface synoptic maps data, duration of anticyclonic weather had increased, but according to reanalysis data, duration of cyclonic weather had increased.
About the Author
N. V. Podnebesnykh
Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch,
Russian Academy of Sciences
Russian Federation
Tomsk
Russian Federation
Tomsk
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For citations:
Podnebesnykh N.V. Large-Scale Atmospheric Circulation over Siberia by Data from Surface Synoptic Maps and Reanalysis. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2015;(3):94-99. (In Russ.) https://doi.org/10.15356/0373-2444-2015-3-94-99
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