Abstract
The Global Precipitation Climatology Project has provided, beginning October 2000, operational 1 degree/daily multi-satellite precipitation e elds. Purpose of the present study is to verify this GPCP-1DD product with ground truth over the Alpine area. The surface e elds for the verie cation were gained from 3 100 daily rain gauge measurements operating during the European MAP project (June/July 1997). We compare the earlier experimental version of the GPCP-1DD with the present operational version. The latter is now free of systematic errors and can therefore be recommended as quantitative precipitation estimate on a monthly scale. On the daily scale, however, the operational precipitation pattern exhibits no better accuracy than already achieved by the experimental version. Zusammenfassung
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