How to run ACESS-OM2-RYF from an existing control run?

General
1

Hi,
I want to run ACCESS-OM2-RYF9091 forced by jra55v1.3 (GitHub - COSIMA/01deg_jra55_ryf at ryf9091-on-gadi) from an existing control run. The base documentation that I followed is -run-access-om. I understand that the ACESS-OM2 runs are now managed by ACCESS-NRI, hence that tutorial may not be useful for my use case. Now I also tried to follow this tutorial - Running Model Experiments with payu and git. But I keep getting the below error -

 ice_read_nc_xy: Cannot find variable licefw_io

Which maybe is due to restart file incompatibility? The restart file I am trying to use is this one -

/g/data/ik11/outputs/access-om2-01/01deg_jra55v13_ryf9091/restart995/

Overall, I am a bit confused about all this, and I would very much appreciate if anyone could tell me what the most efficient way is, to run 01deg_jra55v13_ryf9091 setup from a well spun-up existing restart file.

Thanks!

2

Hi Sougata,

To run with old restarts, you need to follow the old COSIMA wiki instructions here:

Also the github config you link above is unlikely to match the config that the restart was run with. If that matters to you, best to ensure you find and use the correct config.

3

Hiya. Yes, that is a way to do a restart from an existing run, using the same version of ACCESS-OM2. But the code has moved a long way from that original RYF run, which started in about 2019! Others will know more, but I think it will be difficult to use those restart files to run with the new ACCESS-NRI release of OM2. One option may be to take the T/S from the restart file to create a new initial condition file and run it from there? [It will be close to spun up, but may need a few years to get stable.]

We have been considering for some time whether we should rerun the RYF control, and have concluded that the use case may not be so urgent (and we definitely don’t have the spare CPU time this quarter).