Description of the MesoNH file format¶

• Table of contents
• Description of the MesoNH file format
  • Viewing the contents of a NetCDF (.nc) file
  • Sample cloud file

MesoNH simulation output is saved into NetCDF (.nc) files with the specific dimensions and variables below. For information, the spatial resolution is 25m per cell for the W_E_direction , W_E_direction, and vertical_levels. Temporal resolution is 5 seconds.

The dataset description below has been obtained with the ncinfo command included in netcdf4-python

title: Meso-NH simulation
    grid_resolution_in_meters:    25.000000      x    25.000000     
    description: Data are from the file REFHR.1.ARMCu.001.dia       
    comments:  Meso-NH  experience starts at 1997    6   21   41400.0000   and 
               segment starts at 1997    6   21   63000.0000 
dimensions(sizes): 
    time(144), 
    W_E_direction(256),
    S_N_direction(256), 
    vertical_levels(160)
variables(dimensions): 
    int32 time(time), 
    float32 W_E_direction(W_E_direction), 
    float32 S_N_direction(S_N_direction), 
    float32 LON0(), 
    float32 LAT0(), 
    float32 LONOR(), 
    float32 LATOR(),
    float32 BETA(), 
    float32 RPK(), 
    float32 THT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 VLEV(vertical_levels, S_N_direction, W_E_direction), 
    float32 LAT(S_N_direction, W_E_direction), 
    float32 LON(S_N_direction, W_E_direction), 
    float32 TKET(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 UT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 VT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 WT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 PABST(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 RVT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 RCT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 RRT(time, vertical_levels, S_N_direction, W_E_direction), 
    float32 SVT001(time, vertical_levels, S_N_direction, W_E_direction),
    float32 SVT002(time, vertical_levels, S_N_direction, W_E_direction),
    float32 SVT003(time, vertical_levels, S_N_direction, W_E_d
!ncview.png!
irection)

Viewing the contents of a NetCDF (.nc) file¶

the nco package provides the ncview program to display netCDF files.

Sample cloud file¶

cloud_example.nc