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G. Vogel, J. Helmert Deutscher Wetterdienst F. Ament ZMAW University Hamburg

Testing the stand-alone module TERRA using soil moisture and flux observations from different climate regions. G. Vogel, J. Helmert Deutscher Wetterdienst F. Ament ZMAW University Hamburg. COSMO Meeting Cracow, September 2008. CEOP sites. Lindenberg/D. Bondville/USA. Tongyu/China.

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G. Vogel, J. Helmert Deutscher Wetterdienst F. Ament ZMAW University Hamburg

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  1. Testing the stand-alone module TERRA using soil moisture and flux observations from different climate regions G. Vogel, J. Helmert Deutscher Wetterdienst F. Ament ZMAW University Hamburg COSMO Meeting Cracow, September 2008

  2. CEOP sites Lindenberg/D Bondville/USA Tongyu/China 812 mm/a 2003 375 mm/a 312 mm/a 2003 2003 snow, fully humid, hot summer (Dfa) warm temperate, fully humid, warm summer (Cfb) snow, winter dry, hot summer (Dwa) COSMO Meeting Cracow, September 2008

  3. Reference conditions for different soil types (sand, silty sand, loamy sand, sandy loam and loam) Impermeable lower hydrological boundary (“rigid lid”) Depletion of root density with depth Bare soil evaporation according to Noilhan & Planton (1989) Reduction of root depth (0.2m) Revised parameterization of infiltration allowing higher infiltration rates Moisture drainage and diffusion parameterization according to Brooks & Coorey (DWD soil types) Soil heat conductivity does not depend on soil moisture Satellite derived LAI and plant cover (climatolo- gical annual cycle) Variation of surface roughness Variation of stomatal resistance and wilting point Tested options and assumptions … and various combinations of them COSMO Meeting Cracow, September 2008

  4. „Rigid lid“ Soil moisture (27- 81cm) measurement reference run (v4.0) experimental run CEOP Lindenberg (Falkenberg) 2003 COSMO Meeting Cracow, September 2008

  5. „Root depletion with depth“ Soil moisture (27- 81cm) measurement reference run (v4.0) experimental run CEOP Lindenberg (Falkenberg) 2003 COSMO Meeting Cracow, September 2008

  6. „Bare soil evaporation according to Noilhan & Planton (1989)“ Soil moisture (3 - 9cm) measurement reference run (v4.0) experimental run CEOP Lindenberg (Falkenberg) 2003 COSMO Meeting Cracow, September 2008

  7. CEOP Lindenberg (Falkenberg) 2003 Similar improvement also achieved in 2004 – 2006 ! COSMO Meeting Cracow, September 2008

  8. Cropland site (corn) Grassland site Tongyu (China) 2003 Bondville (USA) 2003 COSMO Meeting Cracow, September 2008

  9. COSMO-DE operational run experimental run COSMO Meeting Cracow, September 2008

  10. Latent heat flux area average area average Sensible heat flux area average 7 June 2007, 00 UTC Comparison of COSMO-DE runs with different soil moisture assimilations COSMO Meeting Cracow, September 2008

  11. exp. run COSMO-DE op. run COSMO Meeting Cracow, September 2008

  12. The Bowen ration can be reasonably simulated if the options RL, RD, BSEV and satellite-derived plant cover values are used. In order to consolidate the findings the stand-alone runs should be extended to further sites and years. In autumn, the model performance depends essentially on vegetation pro- perties. Their typical temporal variations should be considered more than before in the simulations. Systematic sensitivity studies should be made to find out under which con- ditions the soil moisture clearly impacts on cloudiness, convection or preci-pitation. For such studies a preceding comparison between the operational assimilations of COSMO-DE- and COSMO-6.6 would be helpful to detect suitable cases. Conclusions COSMO Meeting Cracow, September 2008

  13. COSMO Meeting Cracow, September 2008

  14. COSMO Meeting Cracow, September 2008

  15. Results of soil moisture simulationsbased on the TERRA soil module 4.0 G. Vogel, J. Helmert Deutscher Wetterdienst F. Ament ZMAW University Hamburg COSMO Meeting Cracow, September 2008

  16. CEOP sites COSMO Meeting Cracow, September 2008

  17. COSMO Meeting Cracow, September 2008

  18. COSMO Meeting Cracow, September 2008

  19. Since January, soil and surface measurements from SP Capofiume (Italy) are continuously used to validate the operational predictions of 2m tem- perature, 2m dewpoint temperature, 10m wind speed, soil moisture, soil temperature and of ra- diation balance available from COSMO-EU, GME and COSMO-I7 forecasts. The work has been done for the Work Package of PBL monitoring. COSMO Meeting Cracow, September 2008

  20. reference run (V4.0) experimental run measurement CEOP Lindenberg (Falkenberg) 2003 „Rigid lid“ Latent heat flux Soil moisture (27-81cm) COSMO Meeting Cracow, September 2008

  21. „Root depletion with depth“ reference run (V4.0) experimental run measurement CEOP Lindenberg (Falkenberg) 2003 Soil moisture Latent heat flux (27-81cm) COSMO Meeting Cracow, September 2008

  22. reference run (V4.0) experimental run measurement CEOP Lindenberg (Falkenberg) 2003 „Bare soil evaporation“ Latent heat flux Soil moisture Latent heat flux (3-9cm) COSMO Meeting Cracow, September 2008

  23. uncertainty range of measurement M-SMA (ctrl) COSMO-EU COSMO Meeting Cracow, September 2008

  24. assimilation COSMO_6.6 uncertainty range of measurement M-SMA (ctrl) COSMO-EU COSMO Meeting Cracow, September 2008

  25. COSMO Meeting Cracow, September 2008

  26. COSMO Meeting Cracow, September 2008

  27. COSMO Meeting Cracow, September 2008

  28. COSMO-DE operational run experimental run COSMO Meeting Cracow, September 2008

  29. COSMO-DE operational run experimental run COSMO Meeting Cracow, September 2008

  30. exp. run COSMO-DE op. run COSMO Meeting Cracow, September 2008

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