1 / 25

The IOP6 (24 September 2012) heavy precipitation event over Southern France:

The IOP6 (24 September 2012) heavy precipitation event over Southern France: observational and model analysis Lagouvardos, K. (1), Kotroni, V. (1), Bousquet O. (2), Defer E. (3), Lampiris A. (1), Molinie, G. (4), Ribaud , J-F (2)

anaya
Download Presentation

The IOP6 (24 September 2012) heavy precipitation event over Southern France:

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. The IOP6 (24 September 2012) heavy precipitation event over Southern France: observational and model analysis Lagouvardos, K. (1), Kotroni, V. (1), Bousquet O. (2), Defer E. (3), Lampiris A. (1), Molinie, G. (4), Ribaud, J-F (2) (1) National Observatory of Athens, Greece, (2) CNRM-GAME, CNRS and Météo-France, France, (3) LERMA - CNRS/Observatoire de Paris, France, (4) UJF-Grenoble 1, LTHE UMR 5564, Grenoble, France

  2. INTRODUCTION • Study of a SOP1 case characterized by organized convection and increased lightning activity • Initial analysis of observational data: • raingauges, • satellite imagery, • radar, • lightning (ZEUS and Lightning Map Array). • Analysis of cloud-resolving simulations using WRF model with focus on the microphysical structure of the event.

  3. SYNOPTIC CHART: 06 UTC 24 SEPTEMBER

  4. ZEUS LIGHTNING DATA

  5. RAINGAUGE DATA 00-06 UTC 13-18 UTC 07-12 UTC

  6. METEOSAT-IR 24 SEPTEMBER 01-03 UTC

  7. METEOSAT-IR 24 SEPTEMBER 0200 UTC 0215 UTC 0230 UTC 0245 UTC

  8. RADAR REFLECTIVITY-2000 m agl 01-03 UTC

  9. LIGHTNING MAP ARRAY

  10. WRF (v. 3.4.1) NESTED DOMAINS (6 and 2 km horizontal grid increment)

  11. WRF setup (6 and 2 km horizontal grid increment) Initialization: ECMWF analyses Start: 1200 UTC 23 September 2012 End: 0000 UTC 25 September 2012 Two-way nesting, 40 vertical levels Microphysics: Morrison double-moment microphysical scheme, 5 species (cloud droplets, cloud ice, snow, rain and graupel) Kain-Fritch convective parameterization scheme activated only in Grid 1

  12. WRF Grid 1 mslp, 10-m wind and precipitation 00 UTC 06 UTC

  13. WRF Grid 1 Θe, wind and geopotential at the 850 hPa level 00 UTC 06 UTC

  14. WRF Grid 2 precipitation forecast 00-06 UTC Forecast Observations

  15. WRF Grid 2 precipitation forecast: 06-12 UTC Forecast Observations

  16. WRF Grid 2 hourly precipitation+10 m wind valid at 01-04 UTC

  17. WRF Grid 2 vertical velocity at 0100-0400 UTC 24 September

  18. WRF ice, snow and graupel mixing ratios at 0300 UTC 24 September Ice+ snow mixing ratios, max 1.6 g/kg Graupel mixing ratio, max 5.5 g/kg

  19. CONCLUDING REMARKS-PROSPECTS • The case presented a very interesting convective nature, especially during the first 6 hours of the day (24 September 2012) with rain exceeding 80 mm in 6 hours, increased lightning activity and deep development (as seen by the Nimes radar and LMA data) • WRF simulation was in general successful, while the microphysical characteristics of the model-generated convection were coherent with the observed zone of lightning activity Prospects: study the life-cycle of the microphysical characteristics of the event, in conjunction with radar and lightning data Perform additional cloud resolving simulations with WRF for other IOPs, comparison with other models.

  20. THANK YOU

  21. ADDITIONAL MATERIAL

  22. RADAR REFLECTIVITY-2000 m agl 06-08 UTC

  23. METEOSAT-IR 24 SEPTEMBER 06-08 UTC

More Related