Mom6 Add check for obs_too_deep

[hkershaw-brown]

Description:

• Added error check for observations deeper than the model.
• Added sensible defaults in work/input.nml for running MOM6 with CESM Particularly single_file_in/out = .false. If this is true filter does some wacky things to the MOM6 restart files.

Fixes issue

Fixes #490

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update

Documentation changes needed?

• [ ] My change requires a change to the documentation.
  • [ ] I have updated the documentation accordingly.

Tests

Please describe any tests you ran to verify your changes. Running CESM-MOM6 with DART /glade/scratch/hkershaw/c.T62_g16.Alper.ens3/run

Checklist for merging

• [ ] Updated changelog entry
• [ ] Documentation updated
• [ ] Update conf.py

Checklist for release

• [ ] Merge into main
• [ ] Create release from the main branch with appropriate tag
• [ ] Delete feature-branch

Testing Datasets

• [x] Dataset needed for testing available upon request
• [ ] Dataset download instructions included
• [ ] No dataset needed

[hkershaw-brown]

@hkershaw-brown what's the motivation behind the changes to the nml? Are these related to the obs_too_deep catch? Or just the nml values you used for your test case?

If the latter should they be in this PR?

The nml changes are more sensible defaults for MOM6 the single_file_in/out = .true. that was there caused some problems single_file_in = .true. filter errors out because it is expecting a members directory edit: dimension single_file_out = .true. no error, but filter overwrites the existing restart files, a bunch of MOM6 info gets removed, MOM6 can't restart.

c.e22.GMOM.T62_g16.nuopc.001 is a case specific name, I switched it to a generic name mom6.static.nc

assimilate_these_obs_types is a list of the obs from the World Ocean Data base

init_time_days/seconds = -1 use the model time

I'd like to keep the nml changes in this PR, since they are needed for running DART with CESM-MOM6 and real obs.

The trace execution and ens_sizechanges can be removed.