A sensitivity study on parameterization scheme of snow internal and interfacial processes in snow model

In order to develop a seasonal snow model of land surface process as accura tely as possible for climatic study. it is necessary to fully understand th e effects of important snow internal processes and interaction with air and to get an insight into influence of several relevant parameterization sche mes with parameters' uncertainty to some degree. Using the snow model (SAST ) developed by first author and other one and some useful field observation data, this paper has conducted a series of sensitivity studies on the para meterization schemes. They are relative to compaction process, snow thermal conduction, methodology of layering snow pack and to key parameters such a s snow albedo, water holding capacity. Then, based on the results from the sensitivity studies, some useful conclusions for snow cover model improveme nt are obtained from the analysis of the results.