Atmospheric water parameters measured by a ground-based microwave radiometer and compared with the WRF model

Cossu, Federico; Hocke, Klemens; Martynov, Andrey; Martius, Olivia; Mätzler, Christian (2015). Atmospheric water parameters measured by a ground-based microwave radiometer and compared with the WRF model. Atmospheric science letters, 16(4), pp. 465-472. Wiley 10.1002/asl.583

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The microwave radiometer TROWARA measures integrated water vapour (IWV) and integrated cloud liquid water (ILW) at Bern since 1994 with a time resolution of 7 s. In this study, we compare TROWARA measurements with a simulation of summer 2012 in Switzerland performed with the Weather Research and Forecasting (WRF) model. It is found that the WRF model agrees very well with TROWARA’s IWV variations with a mean bias of only 0.7 mm. The ILW distribution of the WRF model, although similar in shape to TROWARA’s distribution, overestimates the fraction of clear sky periods (83% compared to 60%).

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