Create a user-friendly "process model" testing capability

[MicroTed]

Commit Queue Requirements:

• Fill out all sections of this template.
• All sub component pull requests have been reviewed by their code managers.
• Run the full Intel+GNU RT suite (compared to current baselines) on either Hera/Derecho/Hercules
• Commit 'test_changes.list' from previous step

---

Description:

This PR adds a doubly-periodic idealized "Process Model" capability to UFS-FV3 that is customizable by the user at run time via input.nml and that can be run within the UFS framework and is fully compatible with CCPP physics (GFS_PHYS=1). It allows a user to specify a horizontally homogeneous environment (single sounding) to run with any physics suite and grid configuration (dimensions, grid spacing, etc.). Surface and orographic input conditions can be generated by a python script (docs/ideal_processmodel_doc/create_ideal_sfc_oro_input.py) or read from real data files. The regression test runs an supercell storm simulation as a simple example. Two example suites of simplified physics are provided: One with clould microphysics only (used for RT), and another with added PBL physics.

This capability is distinct from the idealized dycore tests in test_cases.F90 (atmos_cubed_sphere). The new code is meant to work with UFS/CCPP and thus is kept separate in the driver/UFS directory and has an independent namelist. Documentation is added within atmos_cubed_sphere.

This work was led by @LarissaReames-NOAA, who did most of the coding. This PR replaces #2559 because unfortunately she cannot currently work on it.

A self-contained run directory that can be cloned by those who'd like to test the code inside a pre-generated run directory can be found here (will be updated to work with finalized code): https://github.com/MicroTed/ufs_ideal_run.git

Fixes/addresses #2558
Replaces #2559

Commit Message:

* UFSWM -  Adds a doubly-periodic "process model" capability to run physics in a simple environment
  * FV3 - Adds a doubly-periodic "process model" capability to run physics in a simple environment
    * atmos_cubed_sphere - Adds a doubly-periodic "process model" capability to run physics in a simple environment

Priority:

• Normal

Git Tracking

UFSWM:

• Closes Create a user-friendly idealized testing capability #2558

Sub component Pull Requests:

• FV3: Create a user-friendly "process model" testing capability NOAA-EMC/fv3atm#953
  • atmos_cubed_sphere: Create a user-friendly "process model" testing capability NOAA-GFDL/GFDL_atmos_cubed_sphere#380

UFSWM Blocking Dependencies:

• None

---

Changes

Regression Test Changes (Please commit test_changes.list):

• PR Adds New Test (pm_ideal_supercell) with baseline (but maybe doesn't need baseline?) Baseline output on hera at /scratch1/BMC/gsd-fv3-dev/Ted.Mansell/ufs/rt/stmp4/Ted.Mansell/FV3_RT/REGRESSION_TEST/fv3_pm_supercell_intel

Input data Changes:

• New input data (temporarily on hera at /scratch1/BMC/gsd-fv3-dev/Ted.Mansell/ufs/FV_PM_IDEAL/INPUT )

Library Changes/Upgrades:

• No Updates

---

Testing Log:

• RDHPCS
  • Hera
  • Orion
  • Hercules
  • GaeaC5
  • GaeaC6
  • Derecho
• WCOSS2
  • Dogwood/Cactus
  • Acorn
• CI
• opnReqTest (complete task if unnecessary)

[jkbk2004]

@MicroTed can you sync up branches as well?