Meeting minutes
Date: March 25th, 2025
@tiloz , @clairecarouge, @RachelLaw , @manodeep , @MartinDix , @micael , @spencerwong , @pearseb , @ben , @harshula , @tammasloughran , @Aidan , @anton , @Jhan , @inh599, @dougiesquire (late)
Martin: Run with the new, reduced solar constant using Jhan’s latest config. Shows a cool down as expected but nothing dramatic so far.
Harshula: Openmpi 4.1.5 update - no effects on results and negligeable effect on performance.
Jhan: New couple of simulations using latest version of UM7, one with epot change and one without the epot change. Get the same results for both tests, still looking for why there is no difference. Ian: the 2 new test runs show good results compared to Pearse long run with very minor changes to the average ocean temperature.
Forcings: volcanic changes will be very small. Looking at the aerosols next.
ILAMB update: Romain gave an update at the CMIP7 Leadership meeting last Friday. He expects this to be ready in 2-3 weeks. Claire to contact Rhaegar to keep track of this activity.
Compiler update: When trying a simulation from a build with an updated ifort compiler, Harshula and Dougie had similar performance but different results. The next step is unclear. Question from Claire whether it is useful to investigate further considering the plans to change to OneAPI.
Walltime: Jhan has 20 years/day using Sapphire Rapids. Ocean outputs to one file per variable which would increase the walltime slightly. But Jhan noticed problems with the atmosphere conversion. Spencer to have a look.
Pearse: Update to the ocean BGC parameters to come. Long run at year 900.
Dougie: no progress on the new grid.
Dave: CICE5 still under way. Issue with initialisation, trying to resolve this.
Ian: the land group is trying to add some Australian plants in the model. New feature to come.
Rachel: Farewell to Tammas, finishing his post-doc this week
Action:
- Make sure your build PR on ACCESS-ESM1.6 repository are rebased onto the latest main branch. Talk to @harshula if you need help or more information.