Meeting Minutes
Date: 01/04/2025
Attendees: @paulleopardi, @clairecarouge @micael @Jhan @tiloz @inh599 @spencerwong @manodeep @cbull @MartinDix @rbeucher @pearseb @dhb599 @Aidan @dougiesquire @anton @ben
Minutes: @cbull
Martin has a new run CMIP7 solar constant
@MartinDix’s new run has 0.3-0.4 degree cooling in the global mean. Will post some new Figures on the thread.
Paul’s update on CMIP7 forcing files
@paulleopardi has been working on the CMIP7 pre-industrial forcing files for use in ESM1.6. See issues for current challenges and wiki for current understanding of ESM1.5 cmip6 workflow.
Discussion on around which version of the land updates to merge into the current spin-up run
- Ian raised concerns about the combination of land code changes merging into @pearseb existing pre-industrial run. At the moment they ( @inh599 @tiloz ) have some unexplained results and a lack of confidence that the build / config system is actually running the code they expect. Considering parking the current line of work due to time constraints and relative importance.
- Claire Carouge suggested involving someone more familiar with the build system to fix issues rather than parking them.
- Dougie Squire and Jhan emphasized the importance of tracing builds and understanding the changes.
- Dougie/Claire/Chris: up to you as to how much time you have to persue it but it really helps if the build/config is on GitHub (example). Sounds like an issue worth getting to the bottom of. Next action: @Jhan to share the relevant builds on forum or GitHub. @Aidan: feel free to ask for reviews of payu/config use and also helpful if you can put plots on GitHub issues.
Further Land Team Updates
- Ian mentioned progress in updating the ESM with new Australian vegetation PFTs (e.g. spinifex, eucalyptus), though it may be more complex than initially thought.
- Claire Carouge gave an update on ILAMB. Rhaegar is now able to run ILAMB on ESM1.6 outputs. He will put together a workflow so anyone can use ILAMB with ESM1.6 outputs.
Software transformation team and MED team
- Manodeep Sinha reported on the rerun of tests due to a non-deterministic bug in the UM which is being looked into in AMIP, confirming deterministic results across cascade lake/sapphire rapids. Looking to merge into esm.
- Romain been using lite version of MOPPER to create CMOR’isation of output. Will post on the forum about next steps.
Ocean Team Updates
- Pearse Buchanan has been continuing the long runs. Branched off main run at about ~1000 years because there was a slight change, now no longer considering burial of matter through sediments. No longer an open boundary at the bottom for the carbon cycle – seems unsurprisingly that’s bringing things closer to equilibrium. There will be another ecosystem component update soon (Pearse/Dougie hoping to merge wombat sinking PR today – slight answer change). Chris requested that the forum documentation and config repo get updated accordingly.
- Dave has created a CICE5 branch for ESM1.6, put all of his updates of the modules there. Dave has had some trouble compiling. Anton has tried compiling and it looked like it built successfully (still need to check that the executable exists) – will look at it more closely today.