Results

First results were presented at the International Snow Science Workshop 2016 and published in the proceedings of the ISSW

  • A mean undercatch of solid precipitation by 20% can be expected at automatic weather stations in the Austrian Alps applying a standard precipitation correction formula according to Goodison et al. (1998).
  • The high accuracy SHM30 optical snow depth sensor data show the capability to be used operationally for calculation of the depth of new snow even using hourly or sub-hourly time intervals.
  • The approximation of new snow density is the key to calculate precipitation from snow depth changes.

ISSW2016_Proceedings_Helfricht_etal

Results of the second work package are presented in  https://www.hydrol-earth-syst-sci.net/22/2655/2018/hess-22-2655-2018.html

  • The average hourly new snow density is 68 kg m−3 with a standard deviation of 9 kgm−3
  • Relationships between new snow density and wet bulb temperature are partly visible in the automated measurements data.
  • Wind speed is a crucial parameter for the inter-station variability of new snow density, with higher new snow density at more windy locations.
  • We recommend instruments with higher accuracy e.g. optical devices for better investigations of the variability of new snow densities on sub daily intervals.