SIMULATION-MODEL OF CLIMATICALLY DETERMINED VARIABILITY OF CONIFERS ANNUAL INCREMENT (ON THE EXAMPLE OF COMMON PINE IN THE STEPPE ZONE)

A brief description is given of a simulation model of the formation of increment (annual rings) of wood, based on physiological and biophysi cal dependences of the seasonal growth rate on temperature, moisture, and illumination. The model was verified on experimental data for the growth of common pine in the steppe zone of Khakasia in several indepe ndent ways: by comparing the results of calculation of intermediate ec ological characteristics (dynamics of moisture in the soil), by compar ing increment indices, and, by comparing calculated and experimental t racheidograms. The high correlation of calculated and experimental val ues (r = 0.8) indicates that the model that was constructed is adequat e and can be used as a theoretical base for dendroclimatological analy sis.