Sensitivity of a new hectometric scale snow transport scheme to various parameterizations for sublimation and accumulation/erosion

SnowPappus, a new wind snow transport model coupled with Crocus snowpack model, was developed to quantify and model snow drift at a hectometric scale. To reproduce the high spatial variability of the snow cover in Alpine regions, we represent the impact of wind and topography on the simulated snowpack properties. The accurate simulation of the impact of wind is key to anticipate natural hazard related to the snow cover and improve  hydrological predictions. Simulations were performed on a 902 km² French Alps region at 250 m resolution. Here we present the comparison of our snow drift model SnowPappus with in situ measurements and Sentinel 2 snow products, using various sublimation parametrizations and different numerical schemes to represent the horizontal divergence of blowing snow fluxes responsible for accumulation/erosion patterns.