[MITgcm-devel] Bug in KPP

[David Ferreira]

Dimitris,
Also, I would not worry about some modifications of KPP
because it wasn't in the original version of Large et al. They only made 
test
with 1d configurations, and the problem here is due to horizontal 
gradient. So
clearly, they didn't run into it. Also, in this paper:
Danabasoglu, G., W.G. Large, J.J. Tribbia, P.R. Gent, B.P. Briegleb, and 
J.C. McWilliams, 2006: Diurnal Coupling in the Tropical Oceans of CCSM3. 
J. Climate, 19, 2347–2365,
they advise to remove the limit on hbl in stable conditions (and 2 of 
the authors
were in the original KPP paper). BTW, if you look at the appendix of 
this paper, there is a
long list of modifications...
That said, it could be worth trying TKE in the channel as suggested by JMC.
david

Jean-Michel Campin wrote:
> Hi,
>
>   
>> Maybe the condition for computing
>> the stability criterion should be modified to account for lateral fluxes
>> in the model's surface level in addition to surface fluxes proper?
>>     
>
> I understand a little bit David's point, and a little bit Dimitris point,
> But may be this is a more fundamental limitation of a vertical mixing
> scheme which does not have any prognostic variable, and then 
> need to rely on, in this case, surface forcing.
> I would be curious to see Mellor Yamada 2.5 ? or Gaspard et al ?
>
> Jean-Michel
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