COPS - FRANCE

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A N R. Agence nationale de la recherche. COPS - FRANCE. LA, Toulouse IPSL, Paris CNRM, Toulouse LaMP, Clermont-Ferrand. Meso-NH IOP 8B. COPS - France. Instrumentation on supersite V Lidar Juan Cuesta Radar Joël Van Baelen Reinforcement of the GPS network Cédric Champollion - PowerPoint PPT Presentation

Transcript of COPS - FRANCE

  • COPS - FRANCELA, ToulouseIPSL, ParisCNRM, ToulouseLaMP, Clermont-Ferrand

  • COPS - FranceInstrumentation on supersite V Lidar Juan Cuesta Radar Jol Van Baelen Reinforcement of the GPS network Cdric ChampollionSafire Falcon / Leandre II operation Cyrille FlamantNumerical modelling Jean-Pierre Chaboureau Evelyne RichardHigh-resolution assimilation Pierre BrousseauOlivier Caumont Other case studies see Chaboureau

  • DLR Poldirad at Waltenheim sur Zorn14:00 UTC14:20 UTC14:40 UTC15:00 UTC15:20 UTC15:40 UTC16:00 UTCIOP 8B : 15 July 2007

  • Montancy radar observations(2dBz contour PPI 1)Meso-NH (2km - ECMWF driven)(0.1 mm precip contour)Time evolution : Observation versus simulation

  • Time evolution :Observation versus simulationMeso-NH (2km - ARPEGE driven)(0.1 mm precip contour)Montancy radar observations(2dBz contour PPI 1)

  • Montancy radar observations(2dBz contour PPI 1)Meso-NH (2km - ECMWF driven)(0.1 mm precip contour)Time evolution (close up view) : Observation versus simulation

  • Montancy radar observations(2dBz contour PPI 1)Meso-NH (500m - ECMWF driven)(0.1 mm precip contour)Time evolution : Observation versus simulation

  • 2km Meso-NH simulation : 13:00 UTCSurface streamlines / CAPE / precipitation ( )ECMWFARPEGE

  • 2km Meso-NH simulation : 14:00 UTCSurface streamlines / CAPE / precipitation ( )ECMWFARPEGE

  • Vertical cross sections of reflectivity along storm propagationMeso-NH (2km - ECMWF driven)Meso-NH (2km - ARPEGE driven)

  • ConlusionHigh sensitivity to initial conditionsMore convection with ARPEGE CI than with ECMWF CI ( with the truth in between!)Earlier triggering with ARPEGE CI (too early) but a more realistic life cycleMajor role of the low-level convergence

    No significant improvement when :Resolution is increased from 2km to 500m(Triggering occurs too much upwind3D turbulence is accounted for(very weak impact) More on that topic : Trentmann (U. Mainz) and Cardwell (U. Manchester)

  • Mso-NH (500m ECMWF driven)1dBz reflectivity contour

  • Montancy Radar ObservationsMeso-NH simulation (ECMWF)Meso-NH simulation (ARPEGE)15/07/07

  • Time evolution :Impact of the turbulence scheme (1D/3D)Meso-NH (2km 1D turbulence)(0.1 mm precip contour)Meso-NH (2km 3D turbulence)(0.1 mm precip contour)

  • Time evolution :Impact of the initial / forcing conditions Meso-NH (2km - ARPEGE driven)(0.1 mm precip contour)Meso-NH (2km - ECMWF driven)(0.1 mm precip contour)

  • Meso-NH (500m ECMWF driven) (0.1 mm precip contour)Time evolution : Impact of the resolution (2km/ 500m) Meso-NH (2km - ECMWF driven)(0.1 mm precip contour)

  • Meso-NH Forecasts http://mesonh.aero.obs-mip.fr/mesonh/cops/ 3 domains (32, 8, and 2 km) with 2-way interaction. Vertical grid with 50 levels up to 20 km with a grid length varying from 60 m to 600 m. Initial and coupling fields with ECMWF operational forecasts 30 h forecast starting at 00 UTC Parameterization schemes: o 1.5-order turbulence scheme o ECMWF radiation package o ISBA surface scheme o Mixed-phase bulk microphysics: cloud, rain, ice, snow, graupel, and hail (hail is simulated for the inner model only) o Deep and shallow convection scheme for the 32 and 8 km models only

  • OutlineBasic model evaluation Raingauges precipitation measurementsMeteosat IR observations

    An example of an isolated thunderstorm forecast 15 July

  • 24h precipitation (P30h P06h): 04 July 2007 (J185)Precip evaluation : BW stations MF automatic stations Model fields interpolated at rain gauge location

    Thanks to M. Kunz and P. Limnaios

  • Time evolution of the spatially averaged 24h precip. Julian day (July/August)P30h-P06h (mm)

  • Time evolution of the spatially averaged 24h precip.