摘要：The analysis of long-term changes of the major climate variables was conducted using a
time series of observations from meteorological stations that had continuous observations
from 65 up to 120 years. The surface air temperature in the region is characterized by
considerable temporal variability which is most apparent in the winter months and thus in the
annual values. The positive regional trends of the surface air temperature vary from 0.2 to
0.6 °C per decade. On a century time scale, a tendency for a reduction of the annual precipitation
totals prevails. However, the trend values are much lower than the interannual variability of
precipitation. Analyzing the historical climatic conditions of the Baikal Region, we found that the
occurrence of drought is possible in any month of the vegetation period, particularly in
May, when the maximum numbers of dry years (33–64%), and the years with strong
droughts (8–15%) were documented. The influence of climatic conditions on annual wood
growth was studied using the response function technique. Results of this analysis show
that in the Middle Priangarye region, the greatest impact upon the tree ring growth of
pine reflects the mean April temperature, and in the Upper Priangarye region,
annual atmospheric precipitation totals (for the hydrological year) control this
growth.
