Dendroclimatic potential of the Scots pine of the Volga upland of the Ulyanovsk region

The article presents the results of the analysis of annual rings of Scots pine growing on the territory of the Volga Upland (Terengulsky District, Ulyanovsk Region). 10 old trees were investigated, with an average age of 157 years, a maximum of 182 years. On the basis of the chronologies of the growth of model trees of the trial area, one generalized tree-ring chronology of ULN (1837-2012) was obtained, the duration of the series was 176 years. In the constructed chronology, the years with the minimum increment were identified: 1839, 1891, 1921, 1943, 1984, 2010; with the maximum: 1854, 1857, 1886, 1919, 1951, 1990. The greatest rise in growth was observed in 1943-1952. Wavelet analysis in chronology revealed cycles with a period of 13 and 20 years. Correlation analysis showed a positive response of annual rings to June precipitation and January temperature. Thus, the pine of the Volga Upland of the Ulyanovsk Region is sensitive to the lack of precipitation in the summer period, so it has a large dendroclimatic potential, for example, for the reconstruction of droughts of the Volga region.