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Evaluation of HARMONIE using a single column model in the KNMI Parameterization Testbed Cisco de Bruijn and Wim de Rooy Thanks to Roel Neggers.

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Presentation on theme: "Evaluation of HARMONIE using a single column model in the KNMI Parameterization Testbed Cisco de Bruijn and Wim de Rooy Thanks to Roel Neggers."— Presentation transcript:

1 Evaluation of HARMONIE using a single column model in the KNMI Parameterization Testbed Cisco de Bruijn and Wim de Rooy Thanks to Roel Neggers

2 EMS Berlin sept 2011 Introduction: 1.KNMI Parameterization Testbed (KPT) 2.HARMONIE (mesoscale model 2.5 km) Cases: 1.Improved massflux profile in cloud layer 2.Improved fog forecast 3.Windprofile stable boundary layer Conclusions Outlook Content

3 EMS Berlin sept 2011 KPT

4 EMS Berlin sept 2011 Driving Model LES SCM supersite LS subsidence Horizontal advection Dynamical tendencies prescribed Fast physical processes Relaxation to driving model Framework for quick experiments KPT

5 EMS Berlin sept 2011 Cabauw observations KPT

6 EMS Berlin sept 2011 HARMONIE=ALADIN + HIRLAM HARMONIE

7 EMS Berlin sept 2011 AROME/HARMONIE physics Radiation. Convection/Turbulence. Microphysics of warm clouds. Microphysics for atmospheric ice. Sub-grid condensation (Cloud scheme). Surface processes (SURFEX package). HARMONIE

8 EMS Berlin sept 2011 z inv Eddy Diffussivity Mass Flux (Siebesma et al. 2007) HARMONIE

9 EMS Berlin sept 2011 EDKF (Pergaud et al, 2009) One updraft Lateral entrainment/detrainment (Kain Fritsch, 1990) EDMF Two updrafts (Neggers et al, 2008) Lateral entrainment/detrainment (De Rooy and Siebesma, 2008) Convection scheme, differences HARMONIE

10 EMS Berlin sept 2011 In EDKF updraft stops too early due to lack of heat coagulation. Moisture was trapped in a too shallow layer. Improved Mass flux profile in the cloud layer EDKF EDMF

11 EMS Berlin sept 2011 EDMF EDKF LES Improved Mass flux profile in the cloud layer

12 EMS Berlin sept 2011 Mass flux [m/s] EDMF EDKF LES Improved Mass flux profile in the cloud layer

13 EMS Berlin sept 2011 EDKF Observations, visibility Improved Fog forecast EDMF

14 EMS Berlin sept 2011 Improved Fog forecast 3D HARMONIE, two successive runs EDMF with modified cloud scheme Analysis time:14 Feb 12 UTC Analysis time:15 Feb 00 UTC

15 EMS Berlin sept 2011 EDKF EDMF WRF TEMF OBS Windprofile stable ABL

16 EMS Berlin sept 2011 EDKF EDMF WRF TEMF OBS 3D HARMONIE 3D RACMO Windprofile stable ABL

17 EMS Berlin sept 2011 Dynamical tendencies have to be accurate SCM and KPT are useful tools Model has been improved (bug fixes) New parameterizations have been succesfully tested Conclusions

18 EMS Berlin sept 2011 Need for accurate tendencies (mesoscale) for the SCM from HARMONIE 1D/3D model should have the same software cycle Emphasis on other parameterizations like radiation, aerosols and soil physics Outlook


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