Meeting Minutes
Date: February 25, 2025
Attendees: @anton , @clairecarouge , @inh599 , @Jhan , @rbeucher , @Aidan , @arnoldsu , @ben , @harshula , @manodeep , @MartinDix , @micael , @paulleopardi , @pearseb , @spencerwong , @tiloz , @cbull
CICE5 implementation timeline concerns
Claire and Tilo discussed the timeline for CICE 5 implementation, noting that it might not be ready in time for the production runs. They agreed getting more visibility of the work soon is critical. Getting the code in GitHub by the end of April at the latest is essential for any hope to integrate CICE5 in ESM1.6.
Tilo and Chris and others concerned will discuss with Dave and Shioban when Dave comes back from leave.
Problem with the netcdf conversion for UM files
Ian and Jhan noticed the netcdf conversion is sometimes failing. This causes issues for quick evaluation of runs with standard scripts. Aidan and Spencer are aware of the issue and looking into it.
Cmorisation of outputs
Romain is now attending the stand-ups. He is working with Arnold on preparing the cmorisation for CMIP7.
He asked for clarity on the raw output format that will be produced. He will also document all the calculations done on variables for review by the group.
New executable for long runs
Ian said he and Jhan are consolidating several parallel developments in a single source code. These changes also include changes in the configuration and in payu.
In about a week, we are aiming to replace the executable for the long running simulation with this new source code as well as bringing in some changes on the ocean side. The timeline depends on how many sanity checks we want to do beforehand.
Manodeep mentioned if we change the executable it might be good to run on Sapphire Rapids and if possible to compile with the OneAPI compiler. Moving to Sapphire Rapids show a 20% reduction in CPU time and a reduction in cost.
Spencer mentioned adding more CPUs for the atmosphere didn’t show the same improvements as for ESM1.5. This is because in ESM1.6 the atmosphere is waiting on the ocean and not the other way around.
Forcings creation
Paul now has access to scripts used for CMIP6. He needs additional explanations from Tilo or Martin to understand how the scripts work and how to modify them for CMIP7.
Actions
- Tilo to organise a meeting for CICE5 when Dave comes back.
- Aidan and Spencer to investigate the collation and conversion issues
- Ian and Jhan to consolidate the land developments into a single source code and configuration.
Next meeting
March 4th, 2025. Chris to facilitate.