ESM1. 5 Present-Day AMIP Suite

Earth System
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@shayne and I plan to run a present-day control simulation using the atmosphere-only configuration of ESM1.5. This simulation will serve as a reference for a set of AMIP experiments with various SST warming patterns.

While we have ancillary files (e.g., aerosols, ozone) for the AMIP piControl run, I have not been able to find a corresponding set of ancillaries for the present-day configuration. @tiloz have also confirmed that an ESM1.5 AMIP present-day suite and the associated ancillary files are not currently available.

Would it be possible for the ACCESS-NRI team to assist us in developing an ESM1.5 AMIP present-day suite and preparing the necessary ancillary files for our experiments? Your support in setting this up would be greatly appreciated.

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@abhik , we are assessing what we can do here and when. Unfortunately, the people most likely to know about this are all on leave today, so I’m not sure we’ll have a definitive answer before Monday.

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@clairecarouge We are looking forward to hearing from the NRI team soon.

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For a CM2 present day control configuration we used the average of the CMIP6 1985-2014 forcing. Would that be suitable for you.

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@MartinDix We’re happy to proceed with that approach. However, it’s important to maintain consistency by using either time-averaged ancillaries, as in the CM2 present-day control suite, or time-varying ancillaries, as used in the ESM1.5 AMIP suite.

It would also be helpful to have clear guidance on how to replace the existing ancillaries in the suite with periodic time-averaged versions, so the setup remains consistent throughout the experiments.

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@MartinDix Apologies if my earlier post was unclear. We’ve decided to use the CMIP6 PD control (1995–2014 mean) forcing for our experiment, so it would be appreciated if you could generate the corresponding ESM1.5 ancillary files for this setup.

In addition, we were hoping to do a similar run for the late projections period (2081-2100), so we were hoping you could also generate a second set of ancillary files for the ESM1.5? These ancillary files would represent the 2081–2100 mean forcing based on ESM1.5 SSP5-8.5 simulations for our late projection period experiments.

In regard to using these ancillary files, is it simply a matter of changing the namelist?

Thank you for any assistance you can provide.