preindustrial+emissions: new restart

[blimlim]

1. Summary:

What has changed?

This PR cherry picks the changes from #473 into the preindustrial+emissions configuration, specifically:

• updates the restart to a copy of the latest dev-preindustrial+concentrations restart. The 3D CO2 fields in this copy were replaced with the pre-industrial value of 4.3189e-4 following the procedure here
• UM code and MOM namelist changes to allow starting from year 1.

Why was this done?

2. Issues Addressed:

• Configurations for February spinup #472
• Changing restart year to year 1 #449

3. Dependencies (e.g. on payu, or model)

This change requires changes to (note pull request(s) where relevant):

• workflow manager (payu):
• model deployment (ACCESS-ESM1.6):
• model component or library dependency:
• input workflow:

4. Ad-hoc Testing

What ad-hoc testing was done? How are you convinced this change is correct (plots are good)?

Testing performed in #472

The following compares each field in the new emissions restart against the latest restart for the pre-industrial+concentrations configuration. Differences only appear for the 3D CO2 fields:

for i  in range(len(emiss)):
    if not(np.ma.allequal(emiss[i].data, conc[i].data, fill_value=True)) :
        print(emiss[i].attributes["STASH"])
        print(np.unique(emiss[i].data))
        print(np.unique(conc[i].data))
        print("------------")

output:

m01s33i002
[0.00043189]
[0.0005981  0.0005981  0.0005981  ... 0.00203594 0.00203595 0.00203602]
------------
m01s33i002
[0.00043189]
[0.0005981  0.0005981  0.0005981  ... 0.0020367  0.00203671 0.00203674]
------------
m01s00i252
[0.00043189]
[0.0005766]
------------
m01s00i252
[0.00043189]
[0.0005766]
------------
m01s33i001
[0.00043189]
[0.00036354 0.00036354 0.00036354 ... 0.00122753 0.00123108 0.00123202]
------------
m01s33i001
[0.00043189]
[0.00036354 0.00036354 0.00036354 ... 0.00121983 0.00122025 0.00122171]
------------

5. CI Testing

• !test repro has been run

6. Reproducibility

Is this reproducible with the previous commit? (If not, why not?)

• Yes
• No - !test repro commit has been run.

Answers change due to the change in restart

7. Performance

Has the model performance (say, throughput of model-years/wall-day) changed?

• Yes
• No
• N/A (if selected, please add a brief explanation why performance testing is not necessary for this PR)

Restart change not expected to affect performance

If yes, provide the numbers from your testing. Is the performance better or worse?

8. Manifests

Have you changed the executable, the input files and/or the restart files?

• Yes
• No

If yes, have you updated the manifests?

• Yes
• No

To update the manifests, run payu setup (in a cloned copy of your feature branch) with reproducibility tests turned off:

manifest:
  reproduce:
    exe: false
    input: false
    restart: false
runlog:
  enable: false

Then commit the newly created manifest files (under manifests/) only to the branch for this PR.

9. Documentation

Is the documentation updated?

• Yes
• N/A

10. Merge Strategy

• Merge commit
• Rebase and merge
• Squash

[blimlim]

!test repro commit

[github-actions]

❌ The Bitwise Reproducibility Check Failed ❌

When comparing:

• pi-emissions-feb-updates (checksums created using commit 3d6e6af), against
• dev-preindustrial+emissions (checksums in commit 5610345)

🔧 The new checksums will be committed to this PR, if they differ from what is on this branch.

Further information

The experiment can be found on Gadi at /scratch/tm70/repro-ci/experiments/access-esm1.6-configs/3d6e6afe19e80fb4100712c64b87ed307b39c65a, and the test results at https://github.com/ACCESS-NRI/access-esm1.6-configs/runs/64619451214.

The checksums generated by this !test command are found in the testing/checksum directory of https://github.com/ACCESS-NRI/access-esm1.6-configs/actions/runs/22332911656/artifacts/5627786289.

The checksums compared against are found here https://github.com/ACCESS-NRI/access-esm1.6-configs/tree/561034508f72b0256912e7dce462af34726fca2e/testing/checksum

Test summary:
❌ test_repro_historical
✅ test_repro_determinism

[MartinDix]

OK