1. COPS Workshop 2008 University of Hohenheim, Stuttgart; 27 to 29 February 2008 IMGI‘s contribution to the COPS 2007 field experiment Simon Hölzl & Alexander Gohm Institute of Meteorology and Geophysics (IMGI) Innsbruck, Austria

2. Introduction Introduction • Description of IMGI station network • State of data preparation • Data availability • GOP overview • Case study: 4 July 2007 • Conclusion

3. Description of IMGI station network - Overview Description of IMGI station network • 10 Automatic weather stations (MOMAA) • 6 Tipping bucket rain gauges (DAVIS) • 2 Laser disdrometers (THIES) • 1 Weighing rain gauge (OTT PLUVIO) Enz Valley Murg Valley Hornisgrinde

4. Description of IMGI station network - Measured parameters Measured parameters • MOMAA AWS • time resolution: 1 min • Air temperature • Soil temperature • Relative humidity • Wind speed and wind direction • Net radiation • Pressure • precipitation rate (0.1 mm resolution) • DAVIS tipping bucket rain gauge • time resolution: 10 min • precipitation rate (0.2 mm resolution)

5. Description of IMGI station network - Measured parameters Measured parameters • OTT PLUVIO weighing rain gauge • time resolution: 1 min • accumulated precipitation • precipitation rate • THIES laser disdrometer • time resolution: 1 min • precipitation rate [mm/h] • accumulated precipitation • SYNOP/METAR encoding • visibility • radar reflectivity • preciptitation particle size distribution

6. Data preparation Data preparation • Formatting of raw data • Creating data sets of equal length and format • Filling up gaps • Quality control • checking data foroutliers and biases • flagging of missingor questionabledata • Calibration – Bias removal bad data

7. Data availability Data availability MOMAA: 93 % DAVIS: 78 % THIES: 79 % OTT: 76 %

8. GOP overview – Daily accumulated precipitation Daily accumulated precipitation sensor failure moist period

9. GOP overview – Accumulated precipitation for whole SOP Accumulated precipitation for whole SOP Enz Valley Murg Valley ~ 69 % more precipitation Hornisgrinde THIES MOMAA MOMAA THIES OTT

10. Case study – 4 July 2007 Case study – 4 July 2007 ~ 108 % more precipitation Enz Valley Murg Valley THIES MOMAA THIES MOMAA OTT convective events Hornisgrinde

11. Conclusion Conclusion • IMGI deployed 10 AWS equipped with tipping bucket rain gauges, 6 tipping bucket rain gauges, 2 laser disdrometers and 1 weighing rain gauge during the COPS 2007 field experiment • The data set is nearly continuous (> 90 % for MOMAA precipitation data) and has a high spatial and temporal resolution (~ 5 x 5 km, 1 – 10 min) • Possible applications of the IMGI data set: • Instrument intercomparison study • Validation of radar-derived rain rates • Investigation of small scale precipitation variability • Verification of numerical models

12. Thank you for your attention!