The External factors have a substantial influence on the metamorphism of the snow cover. Metamorphism of snow depth includes surface changes of the crystal shapes and sizes, their internal deformations and mutual displacement of crystals or their parts with the violation of the links between them. The temperature regime is one of the main factors of the environment, which determines the direction and intensity of the sublimation of water vapor, which is in turn a controlling factor of metamorphism of snow depth.
However, the speed of metamorphism of the snow cover will be determined not only by the direction and intensity of water vapor sublimation, but also the volume of water vapour contained in the vapour space and the underlying surface, as well as the proximity of sources of water saturation.
During the four winter seasons the full-sized observations for the speed of metamorphism of snow depth on the two control areas with different degree of hydro amorphous landscape facies was conducted by us. The plot № 1 is characterized by moderate hydro amorphous type of facies, but the Plot № 2 is characterized by heavy hydro amorphous facies type.
The coefficients of recrystallization and secondary stratification of snow depth, and coefficient textures were calculated by us, as the parameters to quantify the speed of snow metamorphism.
The speed of crystals growth in the preserved layer was determined. The obtained data about the growth rate of the crystals diameter allow us to judge the speed of metamorphism of a single layer.
In the observed seasons the coefficient textures took the highest values in January at both sites, and the smallest in February, and on the Plot № 1 the values of texture is higher, than at the Plot №2, which is commented on it more sheltered position. In march the texture is improved in comparison with February, but the values of January is does not reach.
Maximum values of the coefficient of secondary stratification in the winter seasons takes in February, and minimum in January. We can also observe that at the Plot №2 the coefficient of the secondary stratification more than at the Plot №1, which can be explained by greater moisture of Plot №2 and accordingly by a large number of water vapor.