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(Article of periodic en Anglais - 2012)

Document title

Estimation of winter precipitation in a high-altitude catchment of the Eastern Italian Alps: validation by means of glacier mass balance observations

Authors(s) and Affiliation(s)

CARTURAN L. ; DELLA FONTANA G. ; BORGA M. ;

Abstract

This work analyses the estimation of winter season (October 1 to May 31) precipitation over a high altitude catchment (Val di Peio) of the Eastern Italian Alps. The extrapolation of precipitation over un-gauged areas is problematic in this basin due 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)

Source

Article of periodic

published at : Geografia fisica e dinamica quaternaria / ISSN 0391-9838

Editor : Comitato glaciologico italiano, Torino - ITALIE (1978)

Millesime : 2012, vol. 35, no1 [pp. 37-48]

Bibliographic references : 87 ref.

Collation : 10 fig., 3 tabl.

Language

Anglais

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