This project aims to develope mixed-layer based ocean component. It also extends the data ocean model (docn) of Community Earth System Model (CESM). It is an experimental framework for fortran based program to work with Julia program without deep embedding.

After creating a CESM case, this is what typically needs to be done.

1. Copy or create soft link of docn_comp_mod.F90 and fortran_lib to $CASEROOT/SourceMods/src.docn. The content of docn_comp_mod.F90 should be the file cesm1_comp_mod.F90.
2. Edit $CASEROOT/env_run.xml entries:
   • STOP_N : xxx (Days of simulation you want)
   • OCN_NCPL : 1 (Ocean update frequency: 1 time per day )
   • DOCN_SOM_FILENAME : pop_frc.gx3v7.110128.nc (actually any valid q-flux file but remember the data will not be used. This is only to make docn run).
3. Edit $CASEROOT/env_mach_pes.xml entries (Please study CESM1 PES LAYOUT GUIDE) :
   • MAX_TASKS_PER_NODE : 4
   • NTASKS_OCN : 1 (Must be 1)
   • NTHRDS_OCN : 1
4. Create your own config.jl(Here after $SMARTSLAB_CONFIG) file for ocean model. You need to specify caseroot, wdir ($CASERUN), domain_file (ex: $CESMINPUTDATA/share/domains/domain.ocn.gx3v7.120323.nc)
5. Run $CASEROOT/cesm_setup, then $CASEROOT/$CASE.build.
6. Edit $CASEROOT/$CASE.run:
   • Remove the sleep 25 command (ill!)
   • Uncomment the line of either mpirun or mpiexec depending on which command is available to you.
7. Create named-pipe files: $CASERUN/cesm2mymodel.pipe and $CASERUN/mymodel2cesm.pipe.

1. Run $CASEROOT/$CASE.run
2. Run julia $SMARTSLABDEV_ROOT/src/CESM_driver/CESM_MLMML/run_CESM_MLMML.jl --config=$SMARTSLAB_CONFIG`

• output_vars seems to be useless in driver. Maybe I should delete that.