Input/output units

The following conventions are used when reading and writing from files in the model. It is worth bearing these in mind if extending the model, to make sure you avoid conflicts. Not all units within these ranges are used, but they are given as ranges to ensure future changes to the model aren’t breaking changes.

• Config files: 1 to 10, avoiding 0, 5 and 6 to avoid conflicts with stderr, stdin and stdout.

• Input data files: Constants namelist files are units 10 to 20. NetCDF file units are dealt with by the UniData NetCDF-Fortran library.

• Output data files: 100 to 110.

• Checkpoint files: 500 to 510.

If you absolutely need to change these variables, they are set in src/DefaultsModule.f90