Effect of small-scale snow surface roughness on snow albedo and reflectance

Abstract. The primary goal of this paper is to present a model snow surface albedo accounting for small-scale roughness effects. based on photon recollision probability, and it can be combined with existing bulk volume models, such as Two-streAm Radiative TransfEr in Snow (TARTES). fed situ measurements from plate profile laser scanner data, evaluated by comparing the computed albedos observations. It provides closer results empirical values than volume-scattering-based simulations alone. impact increases progress melting season larger solar zenith angles. In absolute terms, decrease total up about 0.1. As regards bidirectional reflectance factor (BRF), found that backward scattering especially large angle values.