Proceedings - C-SRNWP Project

Fig.3 Integration domain for LM-
EURO model.
Domain size 641 x 401
Grid spacing
0.0625 (7 km)
Number of layers 40
Time step and scheme 40 s, 2 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 hr
Initial state
ICNMCA 3DVAR (Interp.)
Initialization
Digital Filter
External analysis
T,u,v, PseudoRH, SP
Special features
Filtered topography
Status
Operational
Hardware
IBM P690 (ECMWF)
N° of processors 120
Table 2 Characteristics of LM-EURO model.
In parallel with the operational configuration of the Lokal Modell described above, an
experimental one has been set up over the Italian domain (LM-ITA, Fig.4 and Table 3).
Fig.4 Integration domain for LM-ITA
model
Domain size 542 x 604
Grid spacing
0.025 (2.8 km)
Number of layers 50
Time step and scheme 30 s 3 time-lev split-expl
Forecast range
48 hrs
Initial time of model run 00 UTC
Lateral bound. condit. LM-EURO
L.B.C. update frequency 1 hr
Initial state
LM-EURO
Initialization
Digital Filter
External analysis
None
Special features
Filtered topography
Status
Experimental
Hardware
IBM P690 (ECMWF)
N° of processors 160
Table 3 Characteristics of LM-ITA model.
The LM-ITA implementation differs from the LM-EURO implementation in terms of both
horizontal (2.8 vs 7 Km) and vertical resolution (50 vs 40 layers). Taking into account the
complex orographic structure of Italy (Fig.5), this increase in resolution should be beneficial
towards a more realistic treatment of near surface parameters and accurate forecast of sensible
weather.
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