6. One paragraph description of your model (e.g. abstract from report or paper); The model deals with all main processes which occur in the snow cover and freezing soil. In the beginning of the cold season these processes include accumulation of snow at the surface; coverage of vegetation by snow with corresponding changes of albedo and aerodynamic roughness; cooling of thin upper soil layer below 0^C due to the energy exchange at the surface; moving of the frosen zone into the soil considering the external cooling and heat flux from the deeper layers; freezing of the soil water keeping the zero temperature near the freezing front; upward flux of liquid water to the front with its freezing. The main processes of the melting period are: snow melting (due to heat income with rain or warm fog, or excess of energy income at upper or lower boundary) with secondary refreezing of melt water in the snow cover; melting of the upper soil layer due to the excess of available heat; melt water infiltration into the frozen layers with partial refreezing. Except for meteorological parameters need for the model as forcing, one needs the ground temperature at a depth lower than the soil layer (for example, 3 m) once a week or a month. If the water table is located closely enough to the lower soil boundary, its depth must be specified too. In this case the water table provides additional water influx to the soil where the water can freeze. 50. Please provide references relevant to the model description and use.Shmakin, A.B., 1998: The updated version of SPONSOR land surface scheme: PILPS-influenced improvements. Global and Planetary Change, 19(1-4), 49-62.
Shmakin, A.B., 1999: Testing of cryologic landsurface parameterization scheme for seasonally frozen ground and seasonally melt permafrost. Preprints, 14th Conference on Hydrology, 10-15 January 1999, Dallas, TX, pp., 425-426.