Organization of observations and climatic aspects of instrumental measurements at the Borovoe forestry meteorological station (the Southern Urals)
D.Yu. VASILYEV1, A.A. CHIBILEV2
1Ufa University of Science and Technology, Ufa, Russia
2Institute of Steppe, Ural Branch, Russian Academy of Sciences, Orenburg, Russia
Keywords: observation network, air temperature, precipitation, climate change, Buzuluk pine forest
Abstract
The article provides a brief historical overview of the beginning of instrumental measurements at the Borovoe forestry meteorological station. The analysis was based on the average monthly values of air temperature and daily amounts of atmospheric precipitation with a duration of the analyzed observation series of 120 years. The wavelet analysis method was used to identify periodicity in fluctuations in air temperature and precipitation, and the statistical significance of the obtained results was assessed. A number of statistically significant cycles in fluctuations in air temperature and precipitation were identified; they were conditionally divided into two groups: high-frequency cycles with a duration of 2 to 10 years and low-frequency cycles with periods of 10 years or more. The cross-wavelet analysis method was used to reveal the relationship between fluctuations in air temperature and precipitation and climate indices (North Atlantic Oscillation, Atlantic Multidecadal Oscillation, East Atlantic-West Russian Oscillation, and Arctic Oscillation). The coherence of fluctuations in air temperature and precipitation with the North Atlantic Oscillation, Atlantic Multidecadal Oscillation, and East Atlantic-West Russian Oscillation indices was established. A correlation analysis of instrumental measurements of air temperature and precipitation amounts obtained at the Borovoe forestry meteorological station, at stations of the Roshydromet observation network, and NDVI data was carried out. It has been found that the air temperature values from the Borovoe forestry meteorological station are strongly correlated with the NDVI series and data from most meteorological stations located in the European part of Russia (r = 0.55-0.99), while the series of atmospheric precipitation values from the Borovoe forestry meteorological station correlate well with the readings from stations located within the Southern Urals (r = 0.50-0.67).
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