GABLS workshop, Stockholm, 19-21 June 2007 Simple but realistic cases from Cabauw for GABLS Fred Bosveld (KNMI) with contributions from: Peter Baas Gert Jan Steeneveld Cisko de Bruijn Sander Tijm Henk Klein Baltink
GABLS workshop, Stockholm, 19-21 June 2007 Simple but realistic cases from Cabauw for GABLS Fred Bosveld (KNMI) with contributions from: Peter Baas Gert.
Apr 01, 2015
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GABLS workshop, Stockholm, 19-21 June 2007
Simple but realistic cases from Cabauw for GABLS
Fred Bosveld (KNMI)
with contributions from:
Peter BaasGert Jan SteeneveldCisko de BruijnSander TijmHenk Klein Baltink
GABLS workshop, Stockholm, 19-21 June 2007
Content
- Next steps in GABLS
- Case selection from Cabauw
- Available Observations
- First (HIRLAM) model results
- Boundary conditions
- Proposal
GABLS workshop, Stockholm, 19-21 June 2007
Next steps in GABLS
- Land Atmosphere coupling
- Inertial oscillation and Low Level Jets
- Onset of decoupling
- Morning time transitionGEWEX theme: “The diurnal cycle”}
GABLS workshop, Stockholm, 19-21 June 2007
Cabauw ~1 km
GABLS workshop, Stockholm, 19-21 June 2007
Cabauw ~10 km
GABLS workshop, Stockholm, 19-21 June 2007
Case selection from Cabauw
- Cloudless
- Constant geowind
- Geowind ~ 7 m/s
> 6 m/s to allow for turbulence
< 8 m/s LLJ below top of the 200 m tower
- No dew formation
- 9 cases from 2001 - 2007
GABLS workshop, Stockholm, 19-21 June 2007
Wind speed for 9 cases
GABLS workshop, Stockholm, 19-21 June 2007
Wind speed for 9 cases
GABLS workshop, Stockholm, 19-21 June 2007
Wind direction for 9 cases
GABLS workshop, Stockholm, 19-21 June 2007
Wind direction for 9 cases
GABLS workshop, Stockholm, 19-21 June 2007
Potential temperature for 9 cases
GABLS workshop, Stockholm, 19-21 June 2007
Synoptics 01/02 July 2006
GABLS workshop, Stockholm, 19-21 June 2007
Hodogram 18:00 - 06:00 01/02 July 2006
GABLS workshop, Stockholm, 19-21 June 2007
Richardson number and friction velocity 01/02
July 2006
GABLS workshop, Stockholm, 19-21 June 2007
Sensible and latent heat flux for 01/02
July 2006
GABLS workshop, Stockholm, 19-21 June 2007
Energy budget for 01/02 July 2006 (60 and 180
absent)
GABLS workshop, Stockholm, 19-21 June 2007
Profiles of wind direction and -speed, potential- and dew-point temperature for 01/02 July 2006.
GABLS workshop, Stockholm, 19-21 June 2007
Convective Boundary Layer 02
July 2006
GABLS workshop, Stockholm, 19-21 June 2007
Preliminary model results (HIRLAM) 01/02 July
2006
GABLS workshop, Stockholm, 19-21 June 2007
Boundary conditions
- Initial profiles from Windprofiler/RASS and Radio soundings De Bilt, perhaps IPT.
- Radiation from local observations.
- Constant or linear changing geowind from pressure fields.
- Surface parameters: regional <-> local.
- Soil water conditions from local observations.
GABLS workshop, Stockholm, 19-21 June 2007
Proposed model intercomparison experiment
with simple but realistic case from Cabauw
3 model experiments starting from 12:00 1st July 2006
1. Prescribed surface forcing (Temperature or Flux)
2. Simple soil-vegetation model
3. Each model with its own SVAT, but parameters set for Cabauw.
GABLS workshop, Stockholm, 19-21 June 2007
Thank you !
For more on the proposed case see:
http://www.knmi.nl/~bosveld -> research -> gabls
here also links to first results HIRLAM and MM5 can be found.
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