CMIP7 style sea ice diagnostics

[anton-seaice]

This switches to using all CMIP style diagnostics for sea ice in esm1.6 following the definitions in Notz et al 2016 (with name changes in the CMIP7 data request - https://airtable.com/appGoMZhCpkGESoVk/tblpo5L8maBIGlM1B/viwNNzrqK5oPL7zk2?blocks=hide)

I will write some documentation too - see #234

Contributes to #214

[anton-seaice]

!test repro

[github-actions]

✅ The Bitwise Reproducibility Check Succeeded ✅

When comparing:

• 214-dev-preindustrial+concentrations (checksums created using commit ba06ec3), against
• dev-preindustrial+concentrations (checksums in commit d8b3f5c)

Further information

The experiment can be found on Gadi at /scratch/tm70/repro-ci/experiments/access-esm1.6-configs/ba06ec3e92d0acc68397520ea9c2cfcf7cd43d8b, and the test results at https://github.com/ACCESS-NRI/access-esm1.6-configs/runs/55986409997.

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/19552114853/artifacts/4633488211.

The checksums compared against are found here https://github.com/ACCESS-NRI/access-esm1.6-configs/tree/d8b3f5cbf4c24caa0cb4d264467da09b9e2bc00e/testing/checksum

Test summary:
✅ test_repro_historical
✅ test_repro_determinism

[anton-seaice]

Should be ready to go @blimlim - i'm just running a short test withit

[anton-seaice]

Short test runs looks ok to me ! /g/data/tm70/as2285/payu/esm1.6/20250808-cmor_diags/archive

[blimlim]

Changes look good to me!

[ccarouge]

@anton-seaice @blimlim Should we merge this now? The dev-preindustrial+concentrations branch was updated yesterday with all the other changes. (I note @blimlim still has an open comment/question)

[ofa001]

Hi @anton-seaice Why the odd date 20250808-cmor_diags/archive I haven't re-done the checks but I guess you and @bimlim have checked them all!