Thermodynamic Parameters of Khubsugul Mountain Forests (Khordol-Sardag, Mongolia)

Biology Bulletin. 2023. Vol. 50. No. S2. P. S226–S238.

R. B. Sandlerskiy, Petrzhik N. M., Jargalsaikhan T., Shironiya I. I.

The results of using a thermodynamic approach to study the functioning of mountain forest biogeocenoses based on Landsat 8 OLI TIRS multispectral scanner survey for the landscapes of the northwestern Khubsugul region are presented. Using the example of a section of the Khordol-Sardag ridge, the spatiotemporal variation of thermodynamic characteristics calculated within the framework of the non-equilibrium Tsallis thermodynamics model is considered. The order parameters of the thermodynamic system (invariant states) are identified based on the principal component method. For each invariant, the contribution of relief and the leading morphometric characteristics that determine its spatial variation identified are assessed. The vertical temperature gradient in different seasons is estimated. It is shown that, in conditions of a sharply continental climate, the thermodynamic system of mountain forests has three functional subsystems responsible for evaporation, the thermal field, and productivity. It is also shown that an increase in the mass of woody vegetation increases energy absorption and evapotranspiration, but reduces the non-equilibrium of solar energy transformation.

Keywords: самоорганизация, entropy, энтропия, self-organization, Tsallis entropy, рельеф, Kullback-Leibler information, информация Кульбака-Лейблера, exergy, эксергия, приращение информации, relief, absorbed radiation, information increment, q-index, vertical temperature gradient, q-индекс, энтропия Тсаллиса, поглощенная энергия, вертикальный температурный градиент