to the combined effect of measurement errors and orographic effects. The study is based on the availability of long term series of weather data, snow observations and glacier mass balance measurements. The error in precipitation measurement at the uppermost
weather station was assessed by comparison with snow water equivalent data. The error estimates were consistent with the outcomes of a precipitation correction model, with the aerodynamic correction as its main component. This correction procedure was used
to compute correction factors for the entire precipitation gauge network. This paper highlights the need for precipitation correction in precipitation analyses over snow-dominated mountain areas. This study also provides evidence of a considerable interannual
variability in the correction factors for snow at the uppermost weather station. Further improvements in precipitation estimations would require an analysis of the dominant processes controlling this variability. - (NF)