Heliocyclical Factors in Interdecadal Variability of Climate and Natural Processes on the Example of Yakutia

The natural systems of Yakutia (Eurasian north-east) serve as example in examining the problem of interdecadal variability of climate and natural processes. The work explores the response of heat and moisture supply of the climate and of tree trunk growth for the pines of aufeis valleys of Central Yakutia over the modulation of odd and even 11-year solar cycles. The climatic forecasting for slowing down of winter warming and enhancing the role of summer drought seasons within the next decade is substantiated. In the aufeis valleys we can expect the recovery of aufeis formation, forest fires and slowing down of forest stand trunk growth. The most consequential natural process abnormalities (extremal cooling and warming, droughts, flood waves, forest fires, etc.) are to develop in the segments of rise and fall of the 11-year cycles, in proximity to the periods of solar activity extremums (the maximums and the minimums). Today we have one of such extremums (the minimum of 11-year cycle №25).