6. One paragraph description of your model (e.g. abstract from report or paper); A simple four layer snow model is based on the energy and mass conservation and includes the diffusion of temperature through the pack, the extinction of short wave radiation, melting and freezing, and physically based snow albedo. The variables describing each snow layer are: depth in snow water equivalent, temperature and density. Discretization of the snowpack depth into layers changes with snowfall, melting, sublimation, densification etc... . The snow density changes with time due to compaction, settling and melting and refreezing processes. 50. Please provide references relevant to the model description and use. a paper is being written up describing model physics and validation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Eva Kowalczyk Time Zone: GMT+10 Telephone: (+61 3) 9239 4524 Division of Atmospheric Research, Fax: (+61 3) 9239 4444 CSIRO, email: eva.kowalczyk@dar.csiro.au PMB 1, Aspendale, Victoria 3195, Australia ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~