1 / 6

Poster Session: Numerical Weather Prediction at MeteoSwiss

Poster Session: Numerical Weather Prediction at MeteoSwiss. Philippe Steiner & Francis Schubiger MeteoS wiss. SRNWP/EWGLAM meeting, Ljubljana October 2005. IFS/ECMWF, 40km. 4 daily updates. Alpine Model aLMo Operational since 2001. Swiss version of COSMO LM

affrica
Télécharger la présentation

Poster Session: Numerical Weather Prediction at MeteoSwiss

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. Poster Session:Numerical Weather Prediction at MeteoSwiss Philippe Steiner & Francis Schubiger MeteoSwiss SRNWP/EWGLAM meeting, Ljubljana October 2005

  2. IFS/ECMWF, 40km 4 daily updates Alpine Model aLMoOperational since 2001 • Swiss version of COSMO LM non-hydrostatic, fully compressible • Prognostic variables pressure, 3 wind components, temperature, specific humidity, precipitation (snow, rain), cloud water, cloud ice • regular, 7km mesh size, 45 levels 385 x 325 x 45 gridpoints • 3-hourly assimilation cycle (nudging) • 2 daily 72h forecasts 98% reliability (i.e. 1 problem/month) aLMo domain Philippe.steiner@meteoswiss.ch SRNWP/EWGLAM meeting, 3.-5.10.2005. LJubljana

  3. IFS/ECMWF, 25km, synoptic scale aLMo 7km, regional scale aLMo 2.2km, local scale New aLMo/2 configuration In test, operational in 2008 4 daily updates Philippe.steiner@meteoswiss.ch SRNWP/EWGLAM meeting, 3.-5.10.2005. LJubljana Own assimilation cycle 2 daily 72h forecast Own assimilation cycle 8 daily 18h forecast

  4. 1 image: 10-3-2004, 10:57 UTC Snow cover map based on Meteosat 8 Eumetsat fellowship • Improved spectral + new temporal classification snow map at 5-6 km resolution 24-hour period: 9-3-2004 12:00 UTC - 10-3-2004 12:00 UTC Philippe.steiner@meteoswiss.ch SRNWP/EWGLAM meeting, 3.-5.10.2005. LJubljana spectral/temporal spectral/temporal white : snow dark gray : clouds light gray : snow-free land black : sea

  5. Snow cover map based on Meteosat 8 Eumetsat fellowship • Use also high resolution visible channel with temporal classification snow map at 1.5-2 km resolution Composite snow map, March 10th, 2004, 07:00 - 12:00 UTC Philippe.steiner@meteoswiss.ch SRNWP/EWGLAM meeting, 3.-5.10.2005. LJubljana

  6. 7 km 2.2 km Parameterization of topographic effects on radiation Analysis of slope effect on radiation fluxes at the earth’s surface • slope aspect, slope angle or slope inclination, sky view, shadowing Example: Surface temperature difference, 2004-12-11 00 UTC +12 Philippe.steiner@meteoswiss.ch SRNWP/EWGLAM meeting, 3.-5.10.2005. LJubljana • Substantial impact at high resolution • Higher impact during winter time (sun elevation, snow conditions) • Secondary effects on cloud cover and thermal circulation induced

More Related