[MITgcm-support] EVP subcycling

[Martin Losch]

Hi Kaitlin,

I do not recommend using EVP at all, unless you want to use the “modified” EVP, mEVP or aEVP. I think that the documentation (<https://mitgcm.readthedocs.io/en/latest/phys_pkgs/seaice.html>) should give you an idea how to use either variant. With mEVP or aEVP you may get away with as few as 50 to 100 iterations, but you need check your output fields.

If you decide against EVP altogether, I recommend using at least 10 OL iterations (SEAICEnonlinIterMax) and a higher accuracy of the linear solver (LSR_ERROR = 1e-5 or smaller).

Martin

> On 15. Jun 2018, at 12:50, Naughten, Kaitlin A. <kaight at bas.ac.uk> wrote:
> 
> Hello,
> 
> Is there a rule of thumb for choosing how many subcycles EVP does (i.e. SEAICE_deltaTevp versus deltaT)? Does anyone here follow a specific procedure to decide on the best ratio?
> 
> Many thanks,
> Kaitlin
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