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Evaluation of HARMONIE using a single column model in the KNMI Parameterization Testbed

Evaluation of HARMONIE using a single column model in the KNMI Parameterization Testbed. Cisco de Bruijn and Wim de Rooy Thanks to Roel Neggers. Introduction: KNMI Parameterization Testbed (KPT) HARMONIE (mesoscale model 2.5 km) Cases: Improved massflux profile in cloud layer

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Evaluation of HARMONIE using a single column model in the KNMI Parameterization Testbed

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  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: KNMI Parameterization Testbed (KPT) HARMONIE (mesoscale model 2.5 km) Cases: Improved massflux profile in cloud layer Improved fog forecast Windprofile stable boundary layer Conclusions Outlook Content

  3. EMS Berlin sept 2011 KPT

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

  5. EMS Berlin sept 2011 KPT Cabauw observations

  6. EMS Berlin sept 2011 HARMONIE=ALADIN + HIRLAM HARMONIE

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

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

  9. EMS Berlin sept 2011 HARMONIE Convection scheme, differences • 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)

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

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

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

  13. EMS Berlin sept 2011 Improved Fog forecast Observations, visibility EDKF 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 Windprofile stable ABL EDKF EDMF WRF TEMF OBS

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

  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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