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Simple but realistic cases from Cabauw for GABLS

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. Content. Next steps in GABLS Case selection from Cabauw Available Observations

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Simple but realistic cases from Cabauw for GABLS

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  1. 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

  2. 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

  3. Next steps in GABLS } GEWEX theme: “The diurnal cycle” - Land Atmosphere coupling - Inertial oscillation and Low Level Jets - Onset of decoupling - Morning time transition GABLS workshop, Stockholm, 19-21 June 2007

  4. ~1 km Cabauw GABLS workshop, Stockholm, 19-21 June 2007

  5. ~10 km Cabauw GABLS workshop, Stockholm, 19-21 June 2007

  6. 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

  7. Wind speed for 9 cases GABLS workshop, Stockholm, 19-21 June 2007

  8. Wind speed for 9 cases GABLS workshop, Stockholm, 19-21 June 2007

  9. Wind direction for 9 cases GABLS workshop, Stockholm, 19-21 June 2007

  10. Wind direction for 9 cases GABLS workshop, Stockholm, 19-21 June 2007

  11. Potential temperature for 9 cases GABLS workshop, Stockholm, 19-21 June 2007

  12. Synoptics 01/02 July 2006 GABLS workshop, Stockholm, 19-21 June 2007

  13. Hodogram 18:00 - 06:00 01/02 July 2006 GABLS workshop, Stockholm, 19-21 June 2007

  14. Richardson number and friction velocity 01/02 July 2006 GABLS workshop, Stockholm, 19-21 June 2007

  15. Sensible and latent heat flux for 01/02 July 2006 GABLS workshop, Stockholm, 19-21 June 2007

  16. Energy budget for 01/02 July 2006 (60 and 180 absent) GABLS workshop, Stockholm, 19-21 June 2007

  17. Profiles of wind direction and -speed, potential- and dew-point temperature for 01/02 July 2006. GABLS workshop, Stockholm, 19-21 June 2007

  18. Convective Boundary Layer 02 July 2006 GABLS workshop, Stockholm, 19-21 June 2007

  19. Preliminary model results (HIRLAM) 01/02 July 2006 GABLS workshop, Stockholm, 19-21 June 2007

  20. 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

  21. Proposed model intercomparison experimentwith simple but realistic case from Cabauw • 3 model experiments starting from 12:00 1st July 2006 • Prescribed surface forcing (Temperature or Flux) • Simple soil-vegetation model • Each model with its own SVAT, but parameters set for Cabauw. GABLS workshop, Stockholm, 19-21 June 2007

  22. 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. GABLS workshop, Stockholm, 19-21 June 2007

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