Microclimatic Component of Geosystems in the Mountainous Areas of the Central Pribaikalie Region

Abstract

The purpose is to identify the features of the thermal regime of the upper altitudinal zones of the Primorsky Ridge (including areas susceptible to pyrogenic eff ects) against the background of changes in temperature indicators in the foothill territories of the Central Pribaikalie Materials and methods. The data of meteorological monitoring using autonomous thermographs Thermochron iButton DS1925L-F5 for 2021-2022 at three sites in the northern part of the Primorsky Ridge, as well as data from the Roshydromet network (Bayandai, Uzur, and Kachug stations) were used in this work. Results and discussion. The fi rst results of monitoring observations of surface air temperature in the upper zones of the Primorsky Ridge in 2021-2022 were obtained in comparison with the indicators at the foothill stations. The annual dynamics of air temperature was determined, the sums of positive temperatures and the duration of frost-free period for diff erent locations were calculated. Conclusions. The average annual air temperature in the upper zones of the Primorsky Ridge has negative values of -0.8÷-2.3 ºС; it is lower compared to the surrounding foothill landscapes; the annual amplitude of air temperature also decreases in the high-mountain part by 2.5-9 ºС. The dates of transition of stable air temperatures through 0 º, +5 º; +10 º; +15 ºС for the subalpine and mountain taiga zones are similar, except for the autumn period, when the transition below +5 ºС in the subalpine zone was 19 days earlier. Burnt areas are characterized by higher absolute and dynamic air temperatures compared to areas untouched by fi re.