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New results of stand-alone simulations with the TERRA module

New results of stand-alone simulations with the TERRA module. G. Vogel and J. Helmert. Deutscher Wetterdienst. Lindenberg/Ger. Improvements of Bowen ratio. Bondville/USA. Options: Bare soil evap ( BS ) Depletion of rooting densitiy with depth ( RD ) Rigid lid ( RL )

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New results of stand-alone simulations with the TERRA module

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  1. New results of stand-alone simulations with the TERRA module G. Vogel and J. Helmert Deutscher Wetterdienst

  2. Lindenberg/Ger Improvements of Bowen ratio Bondville/USA Options: Bare soil evap (BS) Depletion of rooting densitiy with depth (RD) Rigid lid (RL) Enlarged infiltr (eINF) Satbsd LAI+plcov (SAT) Satbsd LAI+plcov with modifications (SATm) vs. Standard version Tongyu/China

  3. snow, fully humid, hot summer (Dfa) Bondville/USA 2003 Cropland (corn)

  4. snow, fully humid, hot summer (Dfa) Bondville/USA 2004 Cropland (soy beans)

  5. 2003 2007 Current options (RL+RD+BS+SAT) vs. Standard code (reference) Falkenberg

  6. Falkenberg 2007 Improvement due to enabled ground-water exchange Further improvement possible due to enlarged infiltration Dx74 Dx26 New set (GW+RD+BS +SAT) vs. former options (RL+RD+BS+SAT) New set with enlarged infiltration rate vs. new set of options

  7. Increased performance of Bowen ratio Standard code Current set of options (RL, RD, BS, SAT) New set of options (GW+RD+BS+SAT+ eINF)

  8. Experimental runs A2 (6795) without SMA A3 (7004) with SMA vs. operational COSMO-EU Soil moisture (Falkenberg) Falkenberg 0-1cm 3-9cm March -April 2009 9-27cm

  9. Impact on boundary layer processes in the daily cycle Experimental run with the options GW + RD + BS vs. operat. run March 2009

  10. 9-27cm Soil moisture 27-81cm April 2009 (Falkenberg) Precipitation

  11. Experimental run with the options GW + RD + BS vs. operat. run Impact on turbulent fluxes and temperature 2009,17-27 April Falkenberg

  12. The performance of the TERRA module can be improved if the bare soil evaporation, the water withdraw from soil by the vegetation and the wa- ter transfer at the lower hydrological boundary are modified. Besides a realistic ratio of the turbulent fluxes, their accurate amounts are likewise important to achieve a realistic soil water content in the an- nual cycle as well. Both experimental model runs (with SMA/ without SMA) should be con-tinued to estimate the chosen options more reliably. To consolidate the findings similar validation studies are recommended at other boundary layer sites with different local conditions. Conclusions

  13. 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)

  14. Lindenberg/Ger Improvements of Bowen ratio Bondville/USA Options: Bare soil evap (BS) Root depletion with depth (RD) Rigid lid (RL) Enlarged infiltr (eINF) Satbsd LAI+plcov (SAT) Satbsd LAI+plcov with modif (SATm) vs. Standard version Tongyu/China

  15. 2007 2003

  16. Experimental runs A2 (6795) without SMA A3 (7004) with SMA vs. operational COSMO-EU Falkenberg March -April 2009

  17. Experimental with the options GWc + RD + BS vs. operational run Impact on evapotransporation and 10m specific humidity March 2009

  18. 9-27cm Soil moisture 27-81cm April 2009 (Falkenberg) 3-9cm

  19. Experimental run with the options GW + RD + BS vs. operat. run Impact on sensible and latent heat fluxes at surface April, 1-27 April, 17-27

  20. Experimental run with the options GW + RD + BS vs. operat. run Impact on sensible and latent heat fluxes at surface April, 1-27 April, 17-27

  21. Experimental run with the options GW + RD + BS vs. operat. run Impact on temperature

  22. Impact on sensible and latent heat fluxes at surface Experimental run with the options GW + RD + BS vs. operat. run April 2009

  23. Experimental run with the options GW + RD + BS vs. operat. run Impact on sensible and latent heat fluxes at surface April, 1-27 April, 17-27

  24. Experimental run with the options GW + RD + BS vs. operat. run Impact on temperature April, 1-27 April, 17-27

  25. Experimental run with the options GW + RD + BS vs. operat. run Impact on turbulent fluxes and temperature 2009,17-27 April Falkenberg

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