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More problems with the one degree simulation #120

@simone-silvestri

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@simone-silvestri

the one degree simulation in main is quite weird with temperatures going a bit wild. https://numericalearth.github.io/NumericalEarthDocumentation/dev/literated/one_degree_simulation/

This is most likely caused by changing to zstar and I think the problems might be related to one of the two:

  • radiative forcing (I am looking into it, seems to increase the surface temperature a lot with zstar)
  • GM (uses horizontal derivatives that might interpolate in dead cells)

Also the performance is quite wack ~ 2.6 minutes with zstar vs 1.5 minutes without zstar (dev vs stable), about 70% slower! zstar was typically 10% slower but with 70% starts to become unusable. It is most likely caused by the horizontal derivatives (in GM and biharmonic viscosity) interpolating in z making the tracer tendencies complicated and register hungry. I will look into it more.

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