[ecco-support] Perturbing ECCOv4r4 run/relationship between xx_<VAR> and xx_<VAR>.effective

[Dafydd Stephenson]

Hi all,

I have managed to re-run the ECCOv4r4 simulation and am now interested in applying perturbations to the run. I have so far modified xx_theta.0000000129.data to increase the temperature everywhere by 1K as a test, but the outcome in xx_theta.effective.0000000129.data and T.0000000001.data is in many places 30+K higher than in the unperturbed run.

My understanding (hopefully correct) is that a rescaling is applied to xx_<VAR> to generate xx_<VAR>.effective, so I should be able to invert this rescaling to apply an “effective” perturbation of my choosing? However, I can’t find a weighting file amongst the input files which in any way resembles the transformation applied to my 1K perturbation.

I’m interested to know (i) whether this is the correct way to apply to a perturbation to the ECCO run and (ii) if so, how to modify xx_<VAR> such that xx_<VAR>.effective corresponds to the perturbation I want.

Thanks!
Dafydd
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