SUPERCELL

Case description

The SUPERCELL case simulates an idealized supercell thunderstorm with 500m horizontal resolution. Initialized with a radiosounding and a thermal perturbation to trigger convection.

Configuration

Parameter

Value

Category

HPC cases

Dynamics

3D LES

Horizontal grid spacing

500 m (600x600)

Vertical levels

89

Integration length

3600 s (1 hour)

Time step

1.5 s

Turbulence

TKEL (3D)

Cloud scheme

ICE3 or LIMA

Deep convection

NONE

Radiation

NONE

Boussinesq

disabled

Declination

Steps

Step

Script

001_prep_ideal

run_prep_ideal

002_mesonh

run_mesonh

Specificities

Scientific specificities

  • Supercell thunderstorm simulation

  • ICE4 and LIMA microphysics

  • Ice-phase processes (sedimentation, rain, snow, graupel, hail)

  • With/without adjustment (LADJ)

  • With/without time-splitting

Technical specificities

  • 600x600 horizontal grid (300km x 300km)

  • 89 vertical levels with thin shell

  • Thermal perturbation (2K amplitude)

  • Cyclic boundary conditions

Validation

  • Vertical velocity evolution

  • Hydrometeor distributions

  • Precipitation patterns

  • Mesocyclone development

Numerical ressources

20 nodes, 2560 cores (MPI parallel)

References

  • Weisman and Klemp (1982): The simulation of numerically predicted supercellular thunderstorms