This directory contains an interface to a machine learning module.
The code is maintained in a gitlab repository, it must be checked out
/ cloned into a subdirectory named onlie-gan here:

git clone git@gitlab.pik-potsdam.de:hess/online-gan.git

To make use of it, add option --pik_ml to the invocation of the build
script ../../exp/MOM_compile.csh or ../../exp/POEM_compile.csh .  The
library paths for libtorch must be set in
../../bin/environs.pik-hlrs2015-ifort (for the PIK HLRS2015 cluster).
The script ../../exp/pik_ml_compile.csh prepares the details of the
corresponding Makefile.

This coupling interface is invoked from within the FMS couple, in
../../src/coupler/flux_exchange.F90 subroutines flux_exchange_init()
and flux_down_from_atmos()