FOG_3D
Case description
The FOG_3D case is a real 3D fog simulation over the Paris area. This case tests radiation fog representation with detailed microphysics and urban effects.
Configuration
Parameter |
Value |
|---|---|
Category |
Real cases |
Dynamics |
3D LES |
Horizontal grid spacing |
500 m |
Vertical levels |
34 |
Integration length |
21600 s (6 hours) |
Time step |
5 s |
Turbulence |
TKEL (3D) |
Cloud scheme |
ICE3 or LIMA |
Radiation |
NONE or ECMW |
Urban scheme |
TEB |
Surface |
ISBA |
Declination
Configuration |
Cloud scheme |
Radiation |
|---|---|---|
FOG_3D/ICE3 |
ICE3 |
ECMWF |
FOG_3D/LIMA_ECRAD |
LIMA |
ECRAD |
FOG_3D/LIMA_v22222 |
LIMA with 2 moments prognostic equations for all hydrometeors |
ECMWF |
Steps
Step |
Script |
|---|---|
001_pgd |
run_pgd |
002_prep_real |
run_prep_real_case |
003_mesonh |
run_mesonh1 / run_mesonh2 |
Specificities
Scientific specificities
3D fog structure simulation
Urban canopy effects (TEB)
Cloud microphysics variations (ICE3 vs LIMA)
Radiation fog lifecycle
TEB-ISBA coupling
Technical specificities
500m horizontal resolution
34 vertical levels
Multiple time segments
Validation
Fog life cycle and surface expansion
Surface temperature and wind speed
Numerical ressources
20 nodes, 200 cores (MPI parallel)
References
Paris fog observations (Météo-France)