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This section shows how to enable XIOS when compiling OpenIFS so the model can use it.

Compile OpenIFS with XIOS enabled

- environment variables to set

- walk through

TO BE DONE

Run OpenIFS with XIOS enabled

- arguments to use for oifs_run

- namelist switch to enable

- XML files, how to modify (will need Xavier's help with this)

- netcdf output: how to combine with multiple tasks

OpenIFS should be compiled as usual (see 5.5 Building OpenIFS), but setting some environment variables in oifs-config.sh (like NetCDF or GRIB variables):

export OIFS_XIOS=enable
export OIFS_XIOS_DIR=$HOME/xios-install

You can optionally add these variables, but for a typical installation it should not be necessary:

export OIFS_XIOS_INCLUDE=<editme if necessary>
export OIFS_XIOS_LIB=<editme if necessary>

As you might be aware, it is possible to make a customized compilation of OpenIFS (see 5.7 Customize building OpenIFS) by creating your own configuration file:

make/fcm/${OIFS_COMP}-${OIFS_BUILD}.fcm

If you use a different compiler with regard to those predefined in OpenIFS, it requires creating two new configuration files to control the building with XIOS:

make/fcm/xios/${OIFS_COMP}-enable.fcm
make/fcm/xios/${OIFS_COMP}-disable.fcm

You can just create a symbolic link of ${OIFS_COMP}-disable.fcm pointing to disable.fcm, and depending on the needs of your compiler, also create a symbolic link of ${OIFS_COMP}-enable.fcm to an existing file. If this is not the case, you should then create your ${OIFS_COMP}-enable.fcm file.- enabling regular lat-lon grid output (and the implications)