Error in MOM6 initialized from the restart file in a hybrid run

[Youwei]

Hi,

I am doing transient CO2 ensemble experiment in a coupled idealized configuration. The compset is 2000_CAM40_CLM50%SP_CICE_MOM6_SROF. I have a 1000-year spin-up and want to perturbe the initial condition and increase CO2 concentration in atmosphere from Year 1001 by adding below in user_nl_cam

scenario_ghg   =  'RAMP_CO2_ONLY'
ramp_co2_annual_rate   =  1.0
ramp_co2_cap   =  4.0
ramp_co2_start_ymd   =  10010101
pertlim = 1.d-14

pertlim only works for initial simulations. An hybrid run basically starts as an initial simulation. So pertlim should work for hybrid.

Since the pertlim only works through the initial condition, I need to run a hybrid run that use initialize CAM using initial file generated in the 'rest' directory and use restart file to initialize other components by

ncdata = '*cam.i.1001-01-01-00000.nc'

in user_nl_cam and

./xmlchange RUN_TYPE=hybrid
./xmlchange RUN_REFCASE=b.e23.BMOM.f09_sx0.66av1.aqua.production.yr500_branch
./xmlchange RUN_REFDIR=/glade/campaign/univ/unsb0039/scratch/archive/
./xmlchange RUN_REFDATE=1001-01-01

and copy all files in rest directory to the run directory for this case.

After submit the case, I got the error from MOM6:
Unable to find variable TS_CONFIG in any input files

Then, I add

input_filename = 'r'

to the input.nml in SourceMods to ensure that MOM6 to read a restart file.

The error from MOM6 becomes
Unrecognized Temp & salt configuration uniform

It seems that I didn't set MOM6 initialization correctly so MOM6 doesn't read restart file well. Since I haven't found any instruction to restart MOM6 in CESM framework, my question is what is the right routine to restart MOM6 in a hybrid run.


What version of the code are you using?
cesm2_3_beta06-0-g072eee6