Stochastic physics for MPAS

[dustinswales]

Description

This PR implements the ad hoc (SPPT) stochastic-physics for MPAS in the UFSATM.

All credit goes to @gsketefian @NingWang325 @willmayfield @JeffBeck-NOAA for building this capability in MPAS-A. And thanks to @scrasmussen for getting the stochastic physics connected to the UWM.

The MPAS stochastic-physics pattern is advanced in time and applied to null physics tendencies, since the physics are not fully hooked up yet.
The pattern is available to be included as part of the output stream. For example,

Issue(s) addressed

N/A

Testing

All existing FV3 stochastic physics test pass on Ursa using both GNU and Intel.
New MPAS based RT exercising the new functionality.

Dependencies

None (ufs-community:MPAS-A submodule hash to be updated soon)

[NickSzapiro-NOAA]

Here the stochastic physics pattern directly modifies pbl, convection wind tendencies.

Eventually, is the idea to keep this direct modification? Having separate "stoch" wind tendencies would seem to help understanding of process balances and debugging if things go weird

[dustinswales]

Here the stochastic physics pattern directly modifies pbl, convection wind tendencies.

Eventually, is the idea to keep this direct modification? Having separate "stoch" wind tendencies would seem to help understanding of process balances and debugging if things go weird

@NickSzapiro-NOAA That's how it is done with FV3 and within MPAS-A (i.e. applied directly)
The physics process tendencies are ephemeral and immediately aggregated after the pattern application, but if there is a future need to save these perturbed tendencies for diagnostic purposes we could easily add that.

[NickSzapiro-NOAA]

ok, thanks! The wind tendencies can also be used in the potential vorticity budget diagnostics, fyi

I don't see an associated ufs-community/MPAS-Model PR. There are many seemingly unrelated changes:
dustinswales/MPAS-Model@9989024...0d95308
including sea ice, ruc_lsm, smoke, tempo, physics submodules, stream_manger, ...

[dustinswales]

Here is the PR into UFS-community MPAS-A, ufs-community/MPAS-Model#259
The only changes is to handle a new output field (stochy pattern) in the MPAS atmosphere Registry file.

[dustinswales]

@NickSzapiro-NOAA Also included in this PR is switching to using the noaa/develop branch of ufs-community/MPAS-A. Previously, we had been using the feature/mpas_in_ufs branch, but this has been recently merged into noaa/develop, so we don't need it anymore.

[NickSzapiro-NOAA]

oh, thanks. I guess the git diff in FilesChanged tab is wrt the wrong branch for MPAS-Model