Item: Three dimensional snow transport modeling over mountainous terrain
Title: Three dimensional snow transport modeling over mountainous terrain
Proceedings: 1988 International Snow Science Workshop, Whistler, October 12-15
Authors: T. W. Tesche and Dennis E. McNally
Abstract: The Snow Accumulation and Numerical Transport Algorithms (SANTA) modeling system integrates a Hountain Windfield Hodel (HWH), a sophisticated Transport and Diffusion Hodel (TDH), and a bulk Cloud Hicrophysics Hodel (CHH). The SANTA modeling system treats atmospheric transport, cloud microphysics, snow deposition, and resuspension at comparable levels of sophistication. In its general formulation, SANTA is a three-dimensional, time-dependent, multispecies hydrometeorological model that simulates the time evolution of solid, liquid, and water vapor fields within cold orographic storms over complex mountain topography. It may be applied for both local scale and regional scale analysis. Comparison of hourly and daily average snowfall and water equivalent precipitation predictions for the destructive 30 Harch 1982 Sierra Nevada storm shows that the SANTA model predictions match observations closely. From these preliminary verification exercises, the SANTA model shows potential as a tool in avalanche hazard forecasting.
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Keywords: forecasting, snowfall, terrain, santa model
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