1. Development of a European Land Data Assimilation System (ELDAS) Combined Research/Demonstration project EU 5th framework

2. Motivation Pilot study, to combine (European) expertise on soil moisture assimilation Provide a European contribution to GLDAS research Prepare/apply use of satellite data for soil moisture assimilation –MSG: thermal/visible –SMOS: microwave

3. Partners SMHI CEH Wallingford ECMWF Vienna Univ INM Madrid KNMI Alterra Wageningen Univ Bonn DWD/GPCC CNRM Plus User Advisory Board

4. Design of assimilation system precipitation radiation evaporation Soil moisture correction scheme Soil moisture content (sub)surface runoff Observations driving soil moisture correction Synops data METEOSAT or MSG Land surface parameterization scheme Boundary layer scheme

5. Observations: precipitation Raw radar data

6. Observations: precipitation Corrected radar data

7. Observations: precipitation Interpolation to ELDAS grid

8. Observations: precipitation Blend with gauge data

9. ELDORADO LW & SW Radiation Simple data assimilation of METEOSAT TOA products in NWP RT model Verified against BSRN & local SW networks

10. Impact of forcings T Td Loobos, NL

11. Trial assimilation of surface heating rates (Murex) Soil moisture Days when SHR is available (50% data missing, 25% cloudy) + observations -- control -- only SHR assimilated -- only T & RH assimilated -- all assimilated

12. Assimilation of  -wave data (SGP97) T & RH All data Tb only

13. Validation sites

15. 20yr ‘PILPS’-climatology (driven by ERA40) 15mnth CTL with obs P & R 15mnth DA with obs P & R

16. Effect of data assimilation One  of dW Accumulated increment Change of evaporation Change of runoff Change of soil water

17. …and for various classes Classic Mediterranean Frozen groundIrrigation (?)

18. Use of increments to change evaporation Frozen ground Classic Mediterranean Irrigation

19. (Atmospheric) constraint of evaporation Classic Mediterranean Frozen groundIrrigation (?) Precipitation Runoff Storage Evaporation

20. Dealing with increments in ERA40 hydrological budget analysis 1.Subtract I from runoff 2.If runoff < 0, compensate with dW

21. Dealing with increments in ERA40 hydrological budget analysis 1.Subtract I from runoff 2.If runoff < 0, compensate with dW

22. Wrap up Infrastructural developments are involved Demo & Validation in progress Analysis of analyses: fairly inefficient in terms of changing evaporation –Calls for adjustment of  E/  W instead of W

23. Final Workshop 8-11 nov 2004 ECMWF, Reading