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NWP at the Italian Meteorological Service: STATUS REPORT

NWP at the Italian Meteorological Service: STATUS REPORT. Massimo Bonavita , Lucio Torrisi, Antonio Vocino and Francesca Marcucci CNMCA Italian Meteorological Service Pratica di Mare, Rome, Italy. 29 th EWGLAM, Dubrovnik, 8-11 October 2007. Domain size. 769x513. Grid spacing.

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NWP at the Italian Meteorological Service: STATUS REPORT

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  1. NWP at the Italian Meteorological Service: STATUS REPORT Massimo Bonavita, Lucio Torrisi, Antonio Vocino and Francesca Marcucci CNMCA Italian Meteorological Service Pratica di Mare, Rome, Italy 29th EWGLAM, Dubrovnik, 8-11 October 2007

  2. Domain size 769x513 Grid spacing 0.125° (14 Km)‏ Number of layers 40 Time step 150 sec Forecast range 72 hrs Initial time of model run 00/12 UTC L.B.C. IFS L.B.C. update frequency 3 hrs Initial state CNMCA 3D-VAR Initialization Digital Filter External analysis None Status Operational Hardware IBM P690 (ECMWF)‏ N° of processors used 32 (Model), 90 (Analysis) NWP at the IMS 29th EWGLAM, Dubrovnik, 8-11 October 2007

  3. Domain size 641 x 401 Grid spacing 0.0625 (7 km)‏ Number of layers 40 Time step 40 s Forecast range 72 hrs Initial time of model run 00 UTC Lateral bound. condit. IFS L.B.C. update freq. 3 hrs Interpolated 3D-VAR Initial state Initialization D.F.I. External analysis T,u,v, q, SP Special features Filtered topography Status Operational Hardware IBM P690 (ECMWF)‏ N° of processors 120 NWP at the IMS Initial Conditions: Interpolated 14 Km 3D-VAR analysis 29th EWGLAM, Dubrovnik, 8-11 October 2007

  4. NWP at the IMS • Operational from • early 2008. • Meet Hydrology-SAF programme obligations • Help with opportunity LAM EPS efforts • Facilitate comparison with other European wide high resolution modelling systems

  5. NWP at the IMS • The 2.8 km COSMO-IT has been running at the Italian Met. Service since October2006. Intensive verification and tuning of the model has been performed over this period to reach an operational level of skill. Some of the most significant steps: • Multi-layer soil (Schrodin & Heise, 2001) • Semi-lagrangian advection of humidity variables (Baldauf, 2005) • Time integration step tuning (winter storms) • Introduction of observation nudging for model initialization

  6. 3rd SRNWP Workshop on short-range EPS www.meteoam.it srepsws@meteoam.it Rome, 10-12 December 2007 Università Roma I “Sapienza”

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