nwp at the italian weather service: current status and perspectives
DESCRIPTION
NWP at the Italian Weather Service: CURRENT STATUS AND PERSPECTIVES. Massimo Bonavita, Lucio Torrisi, Fabrizio Ciciulla and Antonio Vocino UGM-CNMCA, Rome (Italy). EWGLAM - SRNWP, Ljubljana 3-5 October 2005. Domain size. 385 x 257. Grid spacing. 0.25 Deg ( 28 km). Number of layers. 40. - PowerPoint PPT PresentationTRANSCRIPT
NWP at the Italian Weather Service: CURRENT STATUS AND PERSPECTIVES
Massimo Bonavita, Lucio Torrisi, Fabrizio Ciciulla and Antonio Vocino
UGM-CNMCA, Rome (Italy)
EWGLAM - SRNWP, Ljubljana 3-5 October 2005
CNMCA NWP System
Domain size 385 x 257
Grid spacing 0.25 Deg (28 km)
Number of layers 40
Time step and scheme 150 sec, split semi-implicit
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-PSAS
Initialization N.M.I.
External analysis None
Status Operational
Hardware IBM Power4
N° of processors used 14 (Model), 60 (Analysis)
EWGLAM - SRNWP, Ljubljana 3-5 October 2005
CNMCA NWP System
Domain size 465 x 385
Grid spacing 0.0625 (7 km)
Number of layers 35
Time step and scheme 40 s,3 time-lev split-expl
Forecast range 60 hrs
Initial time of model run 00 UTC
Lateral bound. condit. IFS
L.B.C. update frequency
3 hrs
Initial state EURO-HRM 3D-PSAS
Initialization Digital Filter
External analysis T,u,v, PseudoRH, SP
Special features Filtered topography
Status Operational
Hardware IBM P690 (ECMWF)
N° of processors 120
EWGLAM - SRNWP, Ljubljana 3-5 October 2005
Recent Developments
EURO_HRM Model
Operational introduction of AMSU-A radiance assimil.
• RTTOV 7.1 model in forward and T.L. mode
• AMSU A channels 5-10 over sea
• Rain contamination check: |Tobs-Tfg|ch4 < 1.5K
(Gerard,2003)
• Scan position dependent bias correction
• 200 km thinning
EWGLAM - SRNWP, Ljubljana 3-5 October 2005
Recent Developments
EWGLAM - SRNWP, Ljubljana 3-5 October 2004
Recent Developments
EURO_LM Model
Introduction of prognostic precipitation
New 7-level soil model
EWGLAM - SRNWP, Ljubljana 3-5 October 2005
Current Developments
• Use of AMSU-A radiances over land
• Introduction of 3h assimilation
cycle
• Experimentation with hybrid EnKF – 3DVar approach
EWGLAM - SRNWP, Ljubljana 3-5 October 2005
Current Developments
• Increase of EURO-HRM horizontal resolution to 14Km
• Increase of EURO-LM horizontal resolution to 2.5Km
• EURO-HRM and EURO-LM will be time critical applications at ECMWF
EWGLAM - SRNWP, Ljubljana 3-5 October 2005