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ARPEGE and LMDz physics on EUROCS cumulus case

ARPEGE and LMDz physics on EUROCS cumulus case. M-P Lefebvre 1 , J-L Dufresne 2 , J-Y Grandpeix 2 , J-F Guéremy 3, F Hourdin 2 , P Marquet 3 ,C Rio 2 1 Météo-France/IPSL, Paris, France 2 IPSL/LMD, Paris, France 3 CNRM/GMGEC/EAC, Toulouse, France. PLAN. Project objectives

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ARPEGE and LMDz physics on EUROCS cumulus case

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  1. ARPEGE and LMDz physics on EUROCS cumulus case M-P Lefebvre1, J-L Dufresne2, J-Y Grandpeix2, J-F Guéremy3, F Hourdin2, P Marquet3,CRio2 1 Météo-France/IPSL, Paris, France 2 IPSL/LMD, Paris, France 3 CNRM/GMGEC/EAC, Toulouse, France

  2. PLAN • Project objectives • Structure of the SCM • Eurocs-Cumulus case • Conclusion & prospect Workshop on shallow convection - Toulouse, july 3-4 2006

  3. Project objectives • Development of physical parametrizations is a major issue for GCM community • Since october 2003, IPSL and Meteo France decided to collaborate concerning physical parametrizations in their models Workshop on shallow convection - Toulouse, july 3-4 2006

  4. Project objectives • Share parametrizations • Make common analysis of the results • It’s not « common physics » nor 2 physics but 2 environments of parametrizations • First step: 1D model • 3 domains: • Waves • Radiation • Boundary layer/convection/clouds Workshop on shallow convection - Toulouse, july 3-4 2006

  5. Project objectives • Model: Arpege 1D (cycle 25) • Using existing cases • To call the entire physics of LMDz in Arpege 1D Workshop on shallow convection - Toulouse, july 3-4 2006

  6. Comparison of models’ codes Workshop on shallow convection - Toulouse, july 3-4 2006

  7. Call to the physics routines master.F90 Reading Arpege forcings & profiles Initialize LMDz common Temporal loop: Physique Arpege / Physique LMDz ARPEGE physics: APLPAR LMDz physics: APLLMD Writing output files Workshop on shallow convection - Toulouse, july 3-4 2006

  8. Eurocs-Cumulus case • Idealized case of small cumulus over land • Observations made at the Southern Great Plains on 21st june 1997 from 11h30UTC, during 15h • Surface latent & sensible heat fluxes are prescribed • Small tendencies representing the effect of large scale advection and SW radiation are prescribed • Vertical resolon: 40 levels • Time step : 1 min. Workshop on shallow convection - Toulouse, july 3-4 2006

  9. Key characteristics of the SCM Workshop on shallow convection - Toulouse, july 3-4 2006

  10. Cloud cover Arpege LMD4_KE LMD4_TK LMD4_TH Workshop on shallow convection - Toulouse, july 3-4 2006

  11. LES cloud cover Workshop on shallow convection - Toulouse, july 3-4 2006

  12. SCM results from Lenderink and al (QJRMS,2003) 1730UTC Potential temperature (K) INIT---- LES ---- ARPEGE LMD_KE LMD_TK LMD_TH 2130UTC

  13. SCM results from Lenderink and al (QJRMS,2003) 1730UTC Total water (g/Kg) INIT---- LES ---- ARPEGE LMD_KE LMD_TK LMD_TH 2130UTC

  14. SCM results from Lenderink and al (QJRMS,2003) 1730UTC Cloud cover ARPEGE LMD_KE LMD_TK LMD_TH 2130UTC

  15. SCM results from Lenderink and al (QJRMS,2003) 1730UTC Cloud liquid water (g/kg) INIT---- LES ---- ARPEGE LMD_KE LMD_TK LMD_TH 2130UTC

  16. Resolution dependency : 40 vs 19 levels ___ 40 ----- 19 ARPEGE LMD_KE LMD_TK LMD_TH Total water (g/Kg) at 21h30UTC

  17. Conclusion and prospect • Switching of the physics is now « stabilized » and runs on a PC • Cases: Toga_Coare, Bomex, Eurocs (2) • Future cases: RICO, Fire, IHOP, Ayotte, AMMA … • Project SCUM : run different physics like Arpege, Aladin, Arome, Hirlam • Intercomparison of radiative code (RTMIP) for next IPCC report • Test of new ECMWF LW code (ECMWF) : RTTM is in progress Workshop on shallow convection - Toulouse, july 3-4 2006

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