Rain or snow reaching the ground as precipitation were measured at a high elevation site and at two locations in the valley over the course of the RACLETS campaign: Gotschnagrat (2285 m above sea level - a.s.l.), as well as Laret (1522 m a.s.l.), and Davos Wolfang (1630 m a.s.l.). The applied instruments were owned and operated by ETH Zurich, EPFL and TROPOS.

The fall velocity and size of hydrometeors were measured with disdrometers (Parsivel, OTT HydroMet), that are laser based optical systems to measure all types of precipitation, e.g. drizzle, rain, snow, hail and hybrid forms of these classes. The disdrotemer data was continously recording liquid precipitation in a particle size range of 0.2 to 8 mm, solid precipitation in a particle size range of 0.2 to 25 mm, with particle fall velocities between 0.2 and 20 m sˉ¹. Precipitation was dicriminated into 32 size classes and corresponded to 32 particle velocity classes.

The precipitation measurements were accompanied by snow measurements at Gotschnagrat and in Davos Wolfgang. Instruments to measure aerosol concentrations, meteorological parameters, wind profiles/velocities, and the CloudNet station were also located in Davos Wolfgang.

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Image 1: Measurement site at Weissfluhjoch. © Claudia Mignani image is missing

Image2: Measurement site at Davos Wolfgang. © Claudia Mignani

Additional Info

Field Value
parent RACLETS Field Campaign