Monitoring of annual variability of thunderstorm activity for climatic stations of Western Siberia

The article presents the study results of the annual variability of thunderstorm activity at nine climatic stations in Western Siberia over a fifty-year period from 1971 to 2020. The study revealed a complex quasi-periodic structure of thunderstorm activity series with the most pronounced amplitude of 7–8-year cycles for the forest-tundra and a 2–4-year cycle for the taiga zone, as well as forest-steppes. A synchronous course of increase and decrease periods in the frequency of thunderstorms for individual decades at the studied climatic stations in Western Siberia was revealed.