Meeting notes 25/11/2025
Chair: @clairecarouge
Minutes: @cbull (started a few minutes late)
Participants: @paulleopardi @clairecarouge @lachlanswhyborn @pearseb @Jhan @MartinDix @spencerwong @sofarrell @dougiesquire @dhb599 @harshula @manodeep @cbull @anton (at end)
@Jhan reported that the November test runs are now working after some hiccups with the configuration and Gadi on Friday.
@Jhan AMIP config failing after first year due to old land use change data writing over new Aus PFTs vegetation, creating bad tiles.
- @spencerwong This is the one with an updated LUC file AMIP updates for Australian PFTs by ccarouge · Pull Request #196 · ACCESS-NRI/access-esm1.6-configs · GitHub
- @lachlanswhyborn Ah yep, yet to be merged. We have a new version of the LUC
Manodeep has been optimising the AMIP config by adding compiler flags to UM7 - gains have been minor. The best case has a throughput of 25.2 years/day vs the base throughput of 24.9 years/day. All finished 1-year runs with these updated compiler flags have been bitwise-identical. Details are here
@Jhan was interested in whether the AMIP configuration might scale (inefficiently) with more nodes? @manodeep looked into this a while ago with amip didn’t scale beyond a specific number of nodes but that was a while ago before quite a few changes were made. @manodeep will investigate.
@pearseb: looked at CO2 fluxes last night. Standard sinking parameter the values have came down to zero (good) – promising!
@MartinDix: nitrogen deposition change is in. What would we expect to change? Would be good to follow up with @inh599 or @RachelLaw @tiloz @alexnorton [please provide guidance here to know what to plot to compare the old vs new nitrogen deposition runs and reaching equilibrium!]
@paulleopardi gave a forcing update. [please put details here @paulleopardi]
@clairecarouge documentation work and release. Open to volunteers for people getting involved.
@manodeep, which configurations would be part of the release? @clairecarouge likely the picontrol config to start, then drip feeding the others as they are ready.
@manodeep has been looking into calculating the amount of energy used for reporting purposes. Query around which runs to count. @MartinDix clarified one just comes up with a number that the configuration costs.
@spencerwong other configurations update. prototype historical simulation seems to be running without issues but would like to include the cmip7 solar forcing (@paulleopardi has worked on this and there’s a pr in process). Will need some reviews soon.