SNTHERM (SNow THERmal Model) is a physically based snow and soil model that is forced by meteorologically determined surface fluxes. It simulates most in-snow properties and processes, such as heat conduction, water flow, melt, vapor flow, compaction, grain growth, and in-depth solar absorption. As output, it provides snow depth, profiles of snow temperature, water content, density, grain size, and surface fluxes of sensible heat and evaporation. Optionally, it computes fluxes of solar and longwave radiation and albedo. The underlying soil component contains only a thermal equation, and thus models temperature profiles and frost depth, but not water or vapor flow. Any number of user-supplied soil strata or material types are permitted. The code has been publicly available for several years and is widely used both in the United States and abroad by government agencies, universities, and private industry. SNTHERM is written in FORTRAN 77 and runs on UNIX and PC-based platforms. |
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