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10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Multi-scale Analysis of the Impact of Soil Moisture on Convective Precipitation
C. Kottmeier, C. Hauck, G. Schädler, N. KalthoffInstitute for Meteorology and Climate Research,
University of Karlsruhe
Renewal proposal KO 924/9-2
1. unique soil moisture network
-100
0
100
200
300
400
500
600
700
fluxe
s in
W m
-2
00 03 06 09 12 15 18 21 00time in UTC
B10
H0
V0
Q0
Baden-Airpark, 26.07.2007
-100
0
100
200
300
400
500
600
700
fluxe
s in
W m
-2
00 03 06 09 12 15 18 21 00time in UTC
B10
H0
V0
Q0
Hornisgrinde, 26.07.2007
2. analysis of high-resolution data sets from the COPS-IOPs
-50%
+25% +50%
-25%-50%
+25% +50%
-25%
3. GME/COSMO-DE modelling: influence of soil moisture variability on convective precipitation
precipitation for modified SM
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
• Quantification of the effects of the variability of soil moisture, evapotranspiration and water content in the PBL on convective precipitation processes based on a combined observation/model approach
• observations: soil moisture, soil temperature, energy balance, atmospheric moisture content
• modelling: GME/COSMO-DE; special focus on SVAT formulation
• Identification of the temporal and spatial scales on which such variability influences convective precipitation
• scales: short-term (local impact of soil-atmosphere transport processes) & seasonal scale (soil moisture – precipitation feedback)
General ObjectivesGeneral Objectives::
Aims of the project
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
• Installation soil moisture & soil temperature station network• Soil moisture measurements (will be maintained during the project)• Quality control• Validation & spatial interpolation on COSMO grid
Work Package 1Work Package 1: soil moisture measurement network: soil moisture measurement network
Time schedule & Work Packages
• Selection of case studies, data compilation• Moisture transport in the PBL and energy exchange processes• Comparison with modelled data sets
Work Package 2Work Package 2: : analysis of COPS-IOP’sanalysis of COPS-IOP’s
Time scheduleTime schedule::• Start: 01.07.2006 (PhD student Liane Krauss 01.01.2007)• Soil moisture network: 01.06.2007 – min 01.06.2009; COPS Jun-Aug 2007• if confirmed by DFG: one open position for the modelling part
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Work Package 3Work Package 3: GME/: GME/COSMO modellingCOSMO modelling• Compilation of soil data• SVAT model analysis• High-resolution analysis of COSMO soil moisture representation• Analysis of model deficiencies• Determination and quantification of QPF improvement
Work Packages & Cooperation
CooperationCooperation::• Surface fluxes and valley convection (Foken, Wirth, Kalthoff)• Contribution of lower and upper tropospheric forcing to the initiation and
inhibition of convection over complex terrain (Barthlott, Kalthoff)• Bundle of proposals to exploit the data of the Convective and
Orographically Induced Precipitation Study (COPS)
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Installation of soil moisture network
at least 2007 – 2009installed at existing DWD/LUBW stations
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Stations of the soil moisture monitoring networknumber of stations operating period
COPS specific
sites
COPS Supersites with energy balance station and IMK soil moisture station 3 01.06.07 – 31.08.07
01.06.07 – 01.06.08
COPS Supersites with energy balance station and soil moisture station run by collaborating institutes
2 variable
IMK energy balance station with IMK soil moisture station 7 01.06.07 – 31.08.07
energy balance station and soil moisture stations run by collaborating institutes 4 01.06.07 – 31.08.07
COPS indepen
dent stations
IMK soil moisture stations 41 01.06.07 -
soil moisture stations run by collaborating institutes 3 01.06.07 -
TOTAL 60
Soil moisture measurements
preliminary calibrationpreliminary calibration
[Krauss, Barthlott et al. submitted to Meteorol. Zeitschr.][Krauss, Barthlott et al. submitted to Meteorol. Zeitschr.]
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Soil moisture measurements
Waghäusel (N)Waghäusel (N)
Simonswald (S)Simonswald (S)
[Krauss et al. submitted][Krauss et al. submitted]
July 2007July 2007
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Comparison with GME values
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
COSMO-DE case studies
[Krauss et al. submitted][Krauss et al. submitted]
COPS IOP 8bCOPS IOP 8b15.07.0715.07.07
obs – sim (COSMO-DE)obs – sim (COSMO-DE)at 5 cm depthat 5 cm depth
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Outlook: observations during COPS
COPS IOP 11
• higher latent heat flux and lower sensible heat flux at Baden Airpark due to the larger amount of vegetation and larger evaporation from the soil
• soil moisture at 5 cm depth at Baden Airpark decreased by almost 3 Vol% between 9 am and 5 pm while soil moisture at Hornisgrinde remains unchanged
10.04.2008
KIT – die Kooperation vonForschungszentrum Karlsruhe GmbHund Universität Karlsruhe (TH)
Outlook
• Model simulations with modified soil moisture fields changes in convective precipitation
-50% +25% +50%-25%
• Site specific calibration of sensors• Spatial interpolation/upscaling approaches• COPS-IOP analyses• COSMO-DE simulations with modified soil moisture fields