The Greenland ice sheet's mass and energy balance depends on blowing snow mass fluxes. Meteorological observations from the Greenland Climate Network (GC-Net), part of the Program for Arctic Regional Climate Assessment (PARCA), provide quantitative estimates of Greenland s glacial meteorology. Based on wind speed and air temperature profiles, a parameterization scheme was devised to estimate blowing snow mass fluxes. The model uses a temperature-dependant entrainment threshold. Annual wind run and blowing snow mass fluxes correlate significantly with elevation along the slope of the Greenland ice sheet. The empirical relationship between elevation and blowing snow mass flux was used to derive annual mass fluxes for the entire ice sheet using a digital elevation model. The results confirm Loewe's 1970 conclusion that the mass flux of blowing snow off the ice margin is insignificant as compared to the ice sheet's annual precipitation input. However, at low elevations where katabatic winds are strongest, blowing snow can contribute significantly to decreasing accumulation rates, especially in localities where precipitation rates are small. According to this scheme, the blowing snow mass flux for elevations typically below the equilibrium line altitude is equal to that in the larger region above. Hence, Greenland's katabatic winds are responsible for significant precipitation losses by mass redistribution and enhanced sublimation