SSS restoring

[aekiss]

SSS is restored to WOA2013v2 - for details see sec 3.5.2 in this draft tech report http://cosima.org.au/wp-content/uploads/2022/08/ACCESS-OM2-1-025-010deg-2022-02-18-315386c.pdf

We could

• look at the restoring diagnostic to see if it's significant
• consider experiments with no restoring or weaker restoring
• consider experiments with salt_restore_under_ice set to false

[adele-morrison]

I vote we leave options 2 and 3 above for later, because it would probably need at least a 20 year control run spinup with no restoring under ice, then 10 years each of continued control and meltwater at depth simulations. So 40 years of simulation. There's a lot to understand in the base case first.

[aekiss]

Here's the 1905-1909 climatological monthly mean surface salt flux due to SSS in Control (01deg_jra55v13_ryf9091_DSW) in a few different months, in 1e-6 kg/m^2/s. The perturbation runs look nearly identical. Plotted by seaice.ipynb.

Not sure how significant this is - we need a yardstick for comparison, e.g. salt flux from brine rejection. Could also back-of-envelope convert these numbers to salinity tendency over the MLD.