CSIRO - ACCESS-NRI standup minutes

CMIP7 CMIP7 development
65

Meeting minutes 18/11/2025

Chair @clairecarouge
Minutes @spencerwong
Participants: @harshula, @spencerwong, @RachelLaw, @paulleopardi, @MartinDix, @sofarrell, @lachlanswhyborn, @clairecarouge, @Jhan, @manodeep, @anton, @inh599, @rbeucher, @dhb599, @pearseb, @alexnorton, @dougiesquire

Configuration changes

  • The sea ice diagnostic changes have been added to the build and can now be brought into the configuration

  • A decision was made to update the sinking rate parameters without changing the restart file

  • @Manodeep will swap the configuration to 5 nodes, as this is known to boost throughput.

  • The pft parameter changes have not been analysed yet, however increasing the bare ground fraction over Australia has not worked to increase the dust. Given the timeline, it was decided to not try adjusting this any further and instead document that the PFT changes have caused a reduction in dust.

  • The plan is to consolidate the remaining land changes into this PR: Pre-industrial config for optimisation by blimlim · Pull Request #268 · ACCESS-NRI/access-esm1.6-configs · GitHub
    @Jhan will send changes to @spencerwong or add them to the PR directly

New forcings

  • The updated nitrogen forcing should be ready today and @MartinDix notes that the patterns have changed. To understand its effect, we’ll set off runs with and without the new version after the above configuration changes are merged.
  • @paulleopardi is working to use the met office’s ozone processing code now that the required temperature data is available. It was noted that the forcing needs to be ready next week for the next stage of the runs.

Spinup table

  • @inh599 notes that the spin up table needs to be updated to make it clear which runs were kept in the main spinup, and which ones were dropped.

There was a brief note “This was started as a test configuration to investigate the bug.” already there, but this has been expanded upon - Jhan

AMIP and historical configurations

  • @RachelLaw and @tiloz noted that having a test historical configuration is urgent, even if it is not completely up to date with the latest preindustrial configuration as it will allow for tuning carbon