I was just wondering if anyone is aware of any existing quarter (or tenth degree) ocean-sea ice models that have computed (online) heat budget diagnostics (advective, surface (swflx, lw_heat, etc.), mixing terms) at daily intervals. My Honours project’s focus is roughly southward of 55S.
My current analysis has been using monthly diagnostics, but it would be nice (if possible) to move to a higher temporal resolution.
Daily 3D budget diagnostics take up a lot of space (e.g. ~400GB/year for the 1/4-degree, meaning ~16TB over 40 years). I have 2 months worth of daily heat budget diagnostics (May and June 2023) in a simulation at /g/data/e14/rmh561/access-om2/archive/025deg_jra55_iaf_online_mlt_testing/ if that is at all useful. Sounds like @Hangyum’s data might be more useful to you.
As mentioned before, I have added diagnostics to MOM5 to bin the tracer budgets into the mixed layer, thereby allowing you to construct accurate (more accurate than you’d get with daily budget output) mixed layer tracer budgets without the need to output any 3D budget diagnostics at all. However, that work is still a ways off being finished because I can’t find the time to finish it.
Thanks @rmholmes – I might have a look at the data available for those couple of months (I think there is a marine heatwave of interest around that time).
I figured that the storage was the major bottleneck, and that it was probably unlikely to find much in the way of daily budget diagnostics.
Hi @tom_schmaltz, yes I did some daily heat budget diagnostics south of 45S in ACCESS-OM2-01. The first one is the RYF Control case, with 1 year heat budget diagnostics, which is saved in /g/data/ik11/outputs/access-om2-01/01deg_jra55v13_ryf9091_ctrl_heat_budget. The second one is the CMIP6 perturbation experiment at the end of 21st century, which is saved in /g/data/ik11/outputs/access-om2-01/01deg_jra55v13_ryf9091_ssp585_th_heat_budget. There are 3 years of heat budget diagnostics in this experiment. Besides the heat budget terms, I also saved the daily dzt (would be helpful if you want to calculate the temperature tendency terms).
Hope that helps, and let me know if you have any questions!
Hey @rmholmes - possibly silly question - but can daily 3D budget diagnostics be put on tape and then be temporarily unpacked into some /scratch? If not is the challenge there the effort / babysitting required to stream it onto tape as it’s generated at run-time?
Yes definitely possible if someone wanted to put in that effort. However, for the specific application to mixed layer tracer budgets (which is what Tom is interested in) the new online binning system I’ve implemented will most likely be a better way to go as it is more accurate and much easier to work with (with a few caveats, as there are some limitations).
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Aidan
(Aidan Heerdegen, ACCESS-NRI Release Team Lead)
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If there is sufficient interest maybe you could co-opt some others in the community to assist with finishing it?
Hi Tom,
I can’t help with daily data unfortunately. But I have monthly means of the heat budget diagnostics for some years of the ACCESS-OM2-01 IAF cycle 2 south of 60S. Let me know if that’s of interest.