CSIRO - ACCESS-NRI standup minutes

cbull · 6 May 2025 01:38

Meeting Minutes

Date: May 6, 2025
Chair and minutes: Chris Bull

Attendees:

Opening Remarks

Chris Bull opened the meeting; Claire is on leave, so he will be chairing the meetings for the next few weeks.

Discussion on Executable and Configuration Changes

Dougie Squire raised a point about changes requested by @Jhan regarding the executable and configuration for the spin-up.
Jhan is proposing some plant phenology types file changes. Would require an executable change but Dougie wanted to check in on the timing
Config changes. Pearse has added some things to the diag table (currently sitting on the head of the dev-preindustrial concentrations branch)
@inh599, the land people would like to add two new plant types (Australian-isation of land). Requires a build/config change together. And changes to a restart/ancillaries. Would suggest doing the adds at the same time. And more broadly would like to see a test containing all the changes that we’d like to be using for production.
Would be worth tagging the new version.
@dougiesquire advocated for a two phase approach with only a small number of release tags being used. Upcoming features/changes get accumulated on dev branch with spin off tests as needed. Once we’re happy we can create a tag and then that will get picked up by @Jhan’s control run.
@tiloz prefers small incremental changes

Next action:

create a new tag and then Dougie/Jhan can chat offline to get it being used in the spin up run. Will check in with @inh599 / @RachelLaw (discussed above/below) as to whether they should also include other land changes.

CMIP7 input project

The CMIP7 GHG forcings for ESM1.6 are defined here

Problem statement, @paulleopardi: Define mapping from land use forcing to ancillaries within ESM1.6. Needs scientific input to get the mapping. Alex Norton and Rachel are working on that. Greenhouse gases are simple to update (could be worth doing in the above updates?).
Next action:

Rachel wrote some Fortran and Alex has converted to python
Rachel suggests that they meet, Paul will follow up after this meeting with a DM.

Ocean update on CICE work.

Anton FYI: CICE5 update will need a payu update.
Anton: Discovered CICE5 configuration is accumulating a lot of water (Anton) have had offline meetings to assess the scientific quality.

Dave: Ocean dynamics are not currently very good currently. Southern Ocean circulation is currently too weak.

Salinity issue in the Mediterranean

Salinity in the Mediterranean slides from Martin (not working), Ian showed Figure from GitHub. Eastern Mediterranean going up linearly (western looks ok), trend is ~0.5/100years. See this Figure. Possible fixes? Ian: CM2 bug reimplementation / local land use changes.