1. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 Global one-meter soil moisture fields for the calibration of GRACE measurements derived from surface observations and satellite passive microwaves C. Simmer, R. Lindau, A. Battaglia, F. Ament, H. Wilker University of Bonn M.Drusch European Centre for Medium-Range Weather Forecast

2. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 ANOVA of Soil Moisture measurements Variance in mm 2 Number of bins Error of the total mean Seeming external variance Error of external means Internal variance True external variance Relative external variance Annual Cycle 36238851103433383.16% Interstation 4829133101558912385.40% Interannual 82391210654260.25% Total variance External variance Internal variance = Variance between + Mean variance the means of the within the subsamples subsamples

3. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 Local longtime means singlecumulative Climatolog. rain58.6 Soil texture0.569.0 Vegetation37.772.8 Terrain slope2.873.0 73% of the soil moisture variance is explained by four parameters :

4. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 Two-step Retrieval Climatological mean derived from: Longterm precipitation Soil texture Vegetation density Terrain slope Temporal anomalies from: Brightness temperatures at 10 GHz Anomalies of rain and air temperature +

5. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 Application: DEKLIM BALTIMOS within DEKLIM (Deutsches Klimaforschungsprogramm): Validation of a 10-years climate run of the regional model REMO using SMMR. Example: Oder catchment R. Lindau and C. Simmer: Derivation of a root zone soil moisture algorithm and its application to validate model data. Nordic Hydrology, accepted for publ.

6. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 Application: AMSR GEOLAND within GMES (Global Monitoring for Environment and Security): Derivation of global soil moisture fields from AMSR M. Leroy, R. Lacaze, R. Lindau, F. Oleson, L. Pessanha, I. Piccard, A. Rosema, J-L. Roujean, F. Rubel, W. Wagner, M. Weiss, 2004: Towards a European Service Center for Monitoring land surfaces at global and regional Scales: The GEOLAND/ CSP Project International Archives of Photogrammetry and Remote Sensing, XXth ISPRS Congress, Istanbul, 35 (B4), 783-790. Longterm mean Temporal anomaly

7. SPP 1257 Workshop – GFZ Potsdam – 28 th November 2005 Comparison with ECMWF‘s Global Soil Moisture Analysis Every 6 hours, ECMWF performs a global soil moisture analysis for its operational weather prediction model (Integrated Forecast System IFS). The soil moisture analysis is based on the soil moisture values modelled in the IFS and corrected by analysed fields of proxy information (i.e. 2m temperature and relative humidity observations; additional use of satellite passive microwave brightness temperature currently tested by MIUB and ECMWF). Depth of analysed soil moisture: 1 m. Spatial resolution: currently 0.5° lat/lon (0.25° scheduled for next year).