Sensitivity of Antarctic surface climate to a new spectral snow albedo and radiative transfer scheme in RACMO2.3p3

Abstract. This study investigates the sensitivity of modeled surface melt and subsurface heating on Antarctic ice sheet to a new spectral snow albedo radiative transfer scheme in Regional Atmospheric Climate Model (RACMO), version 2.3p3 (Rp3). We tune Rp3 observations by performing several experiments assess impact temperature incrementally changing one parameter at time. When fully tuned, compares well with situ remote sensing mass energy balance, melt, near-surface (sub)surface temperature, grain specific area. Near-surface is especially sensitive prescribed fresh area dry metamorphism. These processes, together refreezing water size heating, are important for around margins sheet. Moreover, small changes aforementioned processes can lead an order magnitude overestimation locally leading runoff reduced balance.