A Sensitivity Study of Parameterization Scheme in Snow Cover Model Used in Climate Research
用于气候研究的雪盖模型参数化方案敏感性研究

In order to obtain an optimal seasonal snow scheme in climate studies, it is necessary to conduct deep and comprehensive studies. The sensitivity study should involve internal processes of seasonal snow cover and its interact with the atmosphere above as well as the parameterization schemes, which include many parameters with uncertainty, for the processes and interact, and corresponding physical model structure. By using the seasonal snow cover model (SAST) developed by the authors, several sensitivity studies have been conducted. The sensitivity study included the test of different parameterization schemes (such as compaction process, phase change and its effect, melted snow water process and scheme of layering snow pack) as well as of different parameter values (such as snow surface albedo, effective thermal conductivity and snow water holding capacity), which are all related to the important key physical processes. From the study, some meaningful results have been obtained, which will benefit to seasonal snow model improvement as well will be helpful for land surface process modeling in climate studies.