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Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Testing the stand-alone module.

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Presentation on theme: "Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Testing the stand-alone module."— Presentation transcript:

1 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) 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 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) CEOP sites Lindenberg/D Tongyu/China snow, fully humid, hot summer (Dfa) warm temperate, fully humid, warm summer (Cfb) snow, winter dry, hot summer (Dwa) 812 mm/a Bondville/USA COSMO Meeting Cracow, September 2008 2003 375 mm/a312 mm/a

3 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Tested options and assumptions  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 … and various combinations of them COSMO Meeting Cracow, September 2008

4 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) CEOP Lindenberg (Falkenberg) 2003 COSMO Meeting Cracow, September 2008 reference run (v4.0) measurement experimental run „Rigid lid“ Soil moisture (27- 81cm)

5 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 CEOP Lindenberg (Falkenberg) 2003 reference run (v4.0) measurement experimental run „Root depletion with depth“ (27- 81cm) Soil moisture

6 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) CEOP Lindenberg (Falkenberg) 2003 COSMO Meeting Cracow, September 2008 reference run (v4.0) measurement experimental run „Bare soil evaporation according to Noilhan & Planton (1989)“ (3 - 9cm) Soil moisture

7 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 CEOP Lindenberg (Falkenberg) 2003 Similar improvement also achieved in 2004 – 2006 !

8 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 Bondville (USA) 2003 Tongyu (China) 2003 Cropland site (corn)Grassland site

9 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 operational runexperimental run COSMO-DE

10 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 7 June 2007, 00 UTC Comparison of COSMO-DE runs with different soil moisture assimilations Latent heat flux Sensible heat flux area average

11 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) op. run exp. run COSMO Meeting Cracow, September 2008 COSMO-DE

12 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Conclusions  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. COSMO Meeting Cracow, September 2008

13 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

14 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

15 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008)

16 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Results of soil moisture simulations based on the TERRA soil module 4.0 G. Vogel, J. Helmert Deutscher Wetterdienst F. Ament ZMAW University Hamburg COSMO Meeting Cracow, September 2008

17 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) CEOP sites COSMO Meeting Cracow, September 2008

18 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

19 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

20 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 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.

21 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Soil moisture Latent heat flux CEOP Lindenberg (Falkenberg) 2003 COSMO Meeting Cracow, September 2008 „Rigid lid“ measurement reference run (V4.0)experimental run (27-81cm)

22 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Soil moistureLatent heat flux COSMO Meeting Cracow, September 2008 „Root depletion with depth“ measurement reference run (V4.0) experimental run CEOP Lindenberg (Falkenberg) 2003 ( 27-81cm )

23 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) Latent heat flux COSMO Meeting Cracow, September 2008 (3-9cm) Soil moisture Latent heat flux „Bare soil evaporation“ CEOP Lindenberg (Falkenberg) 2003 measurement reference run (V4.0)experimental run

24 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 uncertainty range of measurement COSMO-EU M-SMA (ctrl)

25 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 uncertainty range of measurement COSMO-EU M-SMA (ctrl) assimilation COSMO_6.6

26 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

27 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

28 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008

29 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 operational runexperimental run COSMO-DE

30 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) COSMO Meeting Cracow, September 2008 operational runexperimental run COSMO-DE

31 Deutscher Wetterdienst Lindenberg Meteorological Observatory Richard Aßmann Observatory Vogel / MOL-RAO (September 2008) op. run exp. run COSMO Meeting Cracow, September 2008 COSMO-DE

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