Surface radiation budget measurements Micro-Scale

PMOD/WRC deployed an instrumental set-up to determine the surface radiation balance by measuring the down-welling and up-welling components of the short-wave and long-wave irradiance. The setup features a Kipp and Zonen CM22 and CM21 pyranometer to measure the short-wave radiation and an Eppley-PIR and Kipp and Zonen CG4 pyrgeometer to measure the long-wave components. All radiometers were calibrated against the respective World standard groups hosted by the World Radiation Center (WRC) at Davos in order to guarantee high quality measurements. The setup was additionally equipped with a modified CGR3 pyrgeometer from Kipp and Zonen which is only sensitive to the 8-14 micrometer band. In combination with the measurements of the broadband pyrgeometer, it is possible to derive the effective radiative temperature of the boundary layer with high temporal resolution (1 min data).