Create a user-friendly "process model" testing capability #953
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…into feature/nsslmicro
…e/nsslmicro-merge
… match allocation/use
Feature/nsslmicro merge gjf
…NOAA/fv3atm into feature/ideal-new
…into feature/ideal-new
Included ccpp suite that turns off pbl and surface layer schemes for better idealized testing.
This reverts commit 2c2e69b.
14 tasks
3 tasks
…nto ideal-periodic
DusanJovic-NOAA
approved these changes
Aug 6, 2025
BrianCurtis-NOAA
approved these changes
Aug 6, 2025
jkbk2004
approved these changes
Aug 6, 2025
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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 #909 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 final: https://github.com/MicroTed/ufs_ideal_run.git
Fixes/addresses ufs-community/ufs-weather-model#2558
Replaces #909
Testing
These code changes have been compiled and tested on both Hera and MacOS. Tests have been run to check that all the various types of sounding options can be used successfully. The full suite of regression tests will be run at the weather model level (new RT input data needed).
No existing baseline changes are expected.
Dependencies
Do PRs in upstream repositories need to be merged first?
If so add the "waiting for other repos" label and list the upstream PRs