1 / 6

Poster Session: Numerical Weather Prediction at MeteoSwiss

Poster Session: Numerical Weather Prediction at MeteoSwiss. Jean-Marie Bettems & Guy de Morsier , MeteoS wiss. SRNWP/EWGLAM meeting, Oslo October 2004. Highest point: 3109m. The Alpine Model at MeteoSwiss - aLMo. Swiss implementation of COSMO model non-hydrostatic, fully compressible

pascha
Download Presentation

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 Jean-Marie Bettems & Guy de Morsier, MeteoSwiss SRNWP/EWGLAM meeting, Oslo October 2004

  2. Highest point: 3109m The Alpine Model at MeteoSwiss - aLMo • Swiss implementation of COSMO model • non-hydrostatic, fully compressible • Prognostic variables • pressure, 3 wind components, temperature, specific humidity, cloud water, cloud ice • soon: turbulent kinetic energy,precipitation (snow, rain) • Mesh defined on the right panel • horizontal: regular, 7km mesh size • vertical: terrain following 45L,100m thickness up to 2000m,top at 25km jean-marie.bettems@meteoswiss.ch SRNWP/EWGLAM meeting, 4-6.10.2004.2004, Oslo

  3. The Alpine Model at MeteoSwiss - aLMo • Initial conditions from assimilation cycle based on nudging method • currently only in-situ observations used (synop, ship, buoy, temp, amdar) • provision for GPS IWV and windprofiler • Lateral boundary conditions from IFS/ECMWF global model • 3 hourly frames • In production since 2001 • 3-hourly intermittent assimilation cycle • two 72h forecasts per day • 97% reliability (i.e. 2 problems/month) • Performance of a single 72h forecast • Run on NEC SX5 at CSCS (Swiss National Supercomputing Center) • 28 Gflops sustained on 14 PUs (25% of peak), 60‘ elapsed time • 12GB main memory • 13GB output data jean-marie.bettems@meteoswiss.ch SRNWP/EWGLAM meeting, 4-6.10.2004.2004, Oslo

  4. 7 km mesh 2.2 km mesh Motivation for higher resolutionForecast of local weather jean-marie.bettems@meteoswiss.ch SRNWP/EWGLAM meeting, 4-6.10.2004.2004, Oslo

  5. IFS/ECMWF, 25km, synoptic scale aLMo 7km, regional scale aLMo 2.2km, local scale Planed aLMo/2 configuration (2005-7)Nested in ECMWF and aLMo/7 4 daily updates jean-marie.bettems@meteoswiss.ch SRNWP/EWGLAM meeting, 4-6.10.2004.2004, Oslo Own assimilation cycle 2 daily 72h forecast Own assimilation cycle 8 daily 18h forecast

  6. Planed aLMo/2 configuration (2005-7)Scientific developments • MeteoSwiss coordinates and participates in many scientific developments • Latent heat nudging with radar data (ETHZ, DFG) • Assimilation of GPS derived water vapor (swisstopo, ETHZ) • Snow analysis using Meteosat 8 (EUMETSAT, ETHZ) • Snow, lake temperature, vegetation analysis using NOAA satellites (Uni Bern) • Turbulence in planetary boundary layer (EPFL) • Dynamical downscaling of ECMWF EPS with the LM (COSMO, NCCR) jean-marie.bettems@meteoswiss.ch SRNWP/EWGLAM meeting, 4-6.10.2004.2004, Oslo Visit our poster for further informations

More Related