Abstract
The results of the study of the thermal structure of early and latewood in the annual rings formed in 1993-2002 in the trees of Arctic white birch (Betula tortuosa Ledeb) and Siberian larch (Larix sibirica Ledeb) grows in the alpine tundra ecotone of The Kuznetsky Alatau. An analysis of the correlation between thermodynamics and mean temperatures and precipitation showed that mainly the June-August weather conditions determine the component composition of early and late birch wood. Air temperature has a noticeable influence on the component composition during the synthesis of cell walls of early and latewood, precipitation - late. The component composition of the early and late foliage trachea was not as sensitive to changing weather conditions. The evaporation rate of the bound latewood water is only observed to be dependent on summer temperatures.
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