Update params

[syha]

Description:

Parameters are updated in model_mod.f90 to be consistent with those in the MPAS-A model (Version 7+).

Fixes issue

fixes #251 theta_m and pressure use rvord (=1.608362) instead of 1.61. cp is now updated from 1003.0 to 1004.5 and cv is changed from 716.0 to 717.5.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] 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

In 2-member tests with a single obs for sounding temperature at 700 hPa, new parameters changed all the analysis variables.

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]

MPAS-A model (Version 5+) https://github.com/NCAR/DART/pull/429#issuecomment-1319351693

[kdraeder]

@soyoung closed #429 because the original pressure calculation appears to be correct, but the commits to include a new qv^2 term seem to still be in this PR. E.g. Bug fix for full pressure with the additional term for qv^2.

[hkershaw-brown]

closing - will redo without the Jedi commits.