Reproducibility tolerances for ACCESS-CM2 piControl?

Earth System
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10

@MartinDix just confirming the piControl rerun that you completed is no longer available for use?

We have decided to rerun 100 years of the piControl starting from 950 for the following reasons:

  1. Whilst the Gadi simulation represents the same climate as the CMIP6 run over centennial timescales, we are interested in the ~10-year sea ice response following a perturbation. We therefore want a control simulation that has been run on the same machine so that our ensembles represent the response to a perturbation only, rather than a response to a perturbation + new machine.
  2. We also want to branch 10 ensembles over the first 100 years (950 - 1050) of the piControl. We’ve chosen this period because Sea Ice Extent in CM2 is biased low and the piControl shows a steady Southern Ocean warming of around 0.3 C and a concurrent SIE reduction over the 500 years of the piControl. Additionally, the decadal restarts for 960-980 throw errors due to missing two cice variables (alvl and vlvl). So to branch from these decades we need to rerun a portion of the control anyway.

I’ve started rerunning the piControl. I’m not sure if this will be useful for others, but it will be available should anyone need. If there is an existing Gadi rerun that is still available, please let me know!

I haven’t yet got to the bottom of why my piC rerun doesn’t quite match @MartinDix’s.