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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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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 flux observations from different climate regions

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


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

Tested options and assumptions

… and various combinations of them

COSMO Meeting Cracow, September 2008


„Rigid lid“ sand, loamy sand, sandy loam and loam)

Soil moisture

(27- 81cm)

measurement

reference run (v4.0)

experimental run

CEOP Lindenberg (Falkenberg) 2003

COSMO Meeting Cracow, September 2008


„Root depletion with depth“ sand, loamy sand, sandy loam and loam)

Soil moisture

(27- 81cm)

measurement

reference run (v4.0)

experimental run

CEOP Lindenberg (Falkenberg) 2003

COSMO Meeting Cracow, September 2008


„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


CEOP Lindenberg (Falkenberg) 2003 (1989)“

Similar improvement also achieved in 2004 – 2006 !

COSMO Meeting Cracow, September 2008


Cropland site (corn) (1989)“

Grassland site

Tongyu (China) 2003

Bondville (USA) 2003

COSMO Meeting Cracow, September 2008


COSMO-DE (1989)“

operational run

experimental run

COSMO Meeting Cracow, September 2008


Latent heat flux (1989)“

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


exp. run (1989)“

COSMO-DE

op. run

COSMO Meeting Cracow, 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.

Conclusions

COSMO Meeting Cracow, September 2008


COSMO Meeting Cracow, September 2008 RL, RD, BSEV and satellite-derived plant cover values are used.


COSMO Meeting Cracow, September 2008 RL, RD, BSEV and satellite-derived plant cover values are used.


Results of soil moisture simulations based on the terra soil module 4 0

Results of soil moisture simulations RL, RD, BSEV and satellite-derived plant cover values are used. based on the TERRA soil module 4.0

G. Vogel, J. Helmert

Deutscher Wetterdienst

F. Ament

ZMAW University Hamburg

COSMO Meeting Cracow, September 2008


CEOP sites RL, RD, BSEV and satellite-derived plant cover values are used.

COSMO Meeting Cracow, September 2008


COSMO Meeting Cracow, September 2008 RL, RD, BSEV and satellite-derived plant cover values are used.


COSMO Meeting Cracow, September 2008 RL, RD, BSEV and satellite-derived plant cover values are used.


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


reference run (V4.0) 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.

experimental run

measurement

CEOP Lindenberg (Falkenberg) 2003

„Rigid lid“

Latent heat flux

Soil moisture

(27-81cm)

COSMO Meeting Cracow, September 2008


„Root depletion with depth“ 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.

reference run (V4.0)

experimental run

measurement

CEOP Lindenberg (Falkenberg) 2003

Soil moisture

Latent heat flux

(27-81cm)

COSMO Meeting Cracow, September 2008


reference run (V4.0) 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.

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


uncertainty range of measurement 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.

M-SMA (ctrl)

COSMO-EU

COSMO Meeting Cracow, September 2008


assimilation COSMO_6.6 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.

uncertainty range of measurement

M-SMA (ctrl)

COSMO-EU

COSMO Meeting Cracow, September 2008


COSMO Meeting Cracow, September 2008 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 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 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-DE 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.

operational run

experimental run

COSMO Meeting Cracow, September 2008


COSMO-DE 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.

operational run

experimental run

COSMO Meeting Cracow, September 2008


exp. run 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-DE

op. run

COSMO Meeting Cracow, September 2008


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