1 / 13

Objective Evaluation of the Meso-NH Simulations during Hibiscus-Troccinox-Troccibras

Objective Evaluation of the Meso-NH Simulations during Hibiscus-Troccinox-Troccibras. Forecasts for the TROCCINOX campaign Three case studies: 13 Feb, 24 Feb, 3 March. J.-P Chaboureau, J.-P. Cammas, J. Duron, F. Gheusi, C. Mari, P. J. Mascart, J.-P. Pinty

jovan
Download Presentation

Objective Evaluation of the Meso-NH Simulations during Hibiscus-Troccinox-Troccibras

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Objective Evaluation of the Meso-NH Simulations during Hibiscus-Troccinox-Troccibras • Forecasts for the TROCCINOX campaign • Three case studies: 13 Feb, 24 Feb, 3 March J.-P Chaboureau, J.-P. Cammas, J. Duron, F. Gheusi, C. Mari, P. J. Mascart, J.-P. Pinty Laboratoire d’Aérologie (UPS/CNRS) Toulouse, France

  2. Daily real-time runs from 27 January to 5 March 2004 posted on http://www.aero.obs-mip.fr/mesonh/troccinox I. Forecasts for the Campaign • One single domain • horizontal grid: 100 x 100 points at 30 km resolution • 72 levels: from 40 m (bottom) up to 600 m (top) • Physics • turbulence: CBR TKE 1D scheme • convection: Bechtold’s scheme • microphysics: Pinty-Jabouille • surface: ISBA • radiation: ECMWF • Initialization/coupling with ECMWF forecasts • Lagrangian tracers • Simulated GOES-E brightness temperature (Tb) 3000 km 3000 km

  3. Model-to-satellite Approach Meso-NH CTRL without cloud fraction GOES-E 11 m Tb +24 h 11 m Tb Cloud top height Direct comparison Meso-NH SUBG with cloud fraction=f(Q1) 00 UTC 24 Feb +24 h

  4. 30-day Objective Evaluation Full domain 3000x3000 km2 IR Tb Correlation 13-14 Feb Falcon+SF2 24 Feb SF4 3-4 March Falcon Bauru area 150x150 km2 IR Tb

  5. Diurnal Cycle over Bauru Area Surface Flux IR Tb CAPE/CIN Precipitation 30-day average Bauru area 150x150 km2

  6. Time Evolution over Bauru CAPE IR Tb min(TB)<205 K Min(TB)<205 K Precipitation Bauru area 150x150 km2

  7. Time-Longitude Diagram Precipitation Meso-NH Tb GOES-E Tb % of Tb<205K Data averaged within 75 km around Bauru

  8. II. Three Case Studies • Preliminary work for three cases: • - 13-14 Feb, 24-25 Feb, and 3-4 March • Same setup as for the forecasts (x=30 km), but: • coupling with analyses (instead of ECMWF forecast) • use of the subgrid cloud scheme • Comparisons with: • - Meteosat Second Generation observations • Falcon and SF2/4 measurements

  9. Comparison with MSG at 10.8 m Meteosat-8 00 UTC 14 Feb 00 UTC 25 Feb 00 UTC 4 March Meso-NH

  10. Comparison with MSG at 3.9 m Meteosat-8 00 UTC 14 Feb 00 UTC 25 Feb 00 UTC 4 March Meso-NH

  11. Comparison with Falcon Flights 1650-2015 UTC 14 Feb 48 h Meso-NH run 36 h Meso-NH runFalcon flight 1719-2055 UTC 3 March Data from DLR

  12. Comparison with SF2 and SF4 24-25 Feb. 13-14 Feb. Data from G. Durry (CNRS)

  13. Conclusions • Forecasts for the TROCCINOX campaign • better agreement with satellite observation when using the subgrid cloud scheme • diurnal cycle of precip. in advance by 3 hours • Deep convection events with Tb<205K more frequent during cold front episodes • Three case studies • encouraging results when comparing with satellite and in-situ observations

More Related