Weather forecasts made by the NWP models of CNR-ISAC, Bologna (I)
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Weather forecasts made by the NWP models of CNR-ISAC, Bologna (I) |
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At the CNR-ISAC Institute a Numerical Weather Prediction chain has been implemented, in the frame of an agreement between the Department of Civil Protection of Italy (DPC) and CNR-ISAC. High resolution mesoscale forecasts are provided up to 48 hours over Italy. Medium resolution forecasts are provided up to 72 hours over Europe. Global forecasts are provided up to 168 hours.
The model chain comprises the hydrostatic models GLOBO and BOLAM , and the non-hydrostatic model MOLOCH , nested in BOLAM. All models have been developed at the ISAC Institute, Bologna, Italy.
GLOBO, used to produced medium range and monthly forecasts, has a horizontal grid spacing of 0.22 in rotated coordinates (about 24 km in medium latitudes),
with 60 levels. Initial conditions are derived from the analyses of the GFS (NOAA/NCEP, USA) global model.
BOLAM uses a rotated coordinate grid, with a horizontal grid spacing of 0.075 (approximately 8 km), with 50 levels and a parameterization (Kain-Fritsch) of moist convection. The initial and boundary conditions are derived from analyses and forecasts of the GFS model.
MOLOCH has a horizontal grid spacing of 0.014 deg., corresponding to 1.5 km, with 50 levels. Moist deep convection is computed explicitely.
The numerical prediction chain starts with the 00 UTC analysis of each day. MOLOCH runs, nested into BOLAM, are initiated at 03 UTC.
The numerical integrations are made on a Linux PC cluster (Debian GNU Linux).
Forecasts are provided for scientific and experimental purposes.