WhatIs: The limit.nc file

The limit.nc file is a NetCDF input file that is read by LMDZ at run-time. It contains the model's boundary conditions such as the fractions of land/ocean/land ice /sea ice, albedo of the surface, surface roughness value, sea surface temperature, etc. These fields are on the same physics grid than LMDZ and given for every day of the year.

Good to know

• Since the limit.nc file is on the same grid as the physics, a given limits.nc file is only valid for a given model horizontal resolution.
• Typically the limit.nc file is generated at the sough resolution using the ce0l main program (compiled at the same resolution as the GCM, obviously).

03/12/2021