[MITgcm-support] Uniform diffkrfile

[Dimitris Menemenlis]

Geoffroy, when you specify a diffkrfile with uniform 1.E-5 m2.s-1 diffusivity, 
the situation would (should!) be equivalent to your case 3 below, that is, 
diffKzT=diffKzS=1.E-5.  Do your case 1 and case 3 below give equivalent results?

D.

> When I try to run an experiment with the following parameters :
> viscAh=0.1,
> viscAz=0.1,
> diffKhT=0.1,
> diffKzT=0.,
> diffKhS=0.1,
> diffKzS=0.,
> and a diffkrfile with a uniform 1.E-5 m2.s-1, I get some instabilities
> very quickly.
> 
> If I try with :
> viscAh=0.1,
> viscAz=0.1,
> diffKhT=0.1,
> diffKzT=1.E-5,
> diffKhS=0.1,
> diffKzS=0.,
> and no diffkrfile, the situation is stable
> 
> And if I try with
> viscAh=0.1,
> viscAz=0.1,
> diffKhT=0.1,
> diffKzT=1.E-5,
> diffKhS=0.1,
> diffKzS=1.E-5,
> and no diffkrfile, the situation is no more stable.