The netCDF library

the NetCDF library

The model reads and writes input and output files in NetCDF (Network Common Data Form) format (developed and maintained by Unidata: https://www.unidata.ucar.edu/software/netcdf/ ) and therefore a NetCDF library must be at hand when compiling and running LMDZ6.

As this library is not quite standard, chances are that you might need to install it yourself on your system (note that the install_lmdz.sh default behavior is to download and install that library), hence this page with some indications on how to do so.

Checking if a NetCDF library is already available

It is possible that the library, including its Fortran component, is already available. An easy way to check this is to see if the related utilities like ncdump are available, i.e. that

which ncdump

returns a positive answer.

Note that this does not suffice as the full library, including its Fortran component, and not just the related utilities are required. A neat way to check this is to use the nf-config

nf-config --all

returns something meaningful. If not, you probably need to take some action along the lines of what is indicated in the following sections.