[MITgcm-devel] serious bug in rStar code

[Martin Losch]

Hi,
last year, there was a paper by Durski et al. 2004, JGR, Vol109, 
doi:10.1029/2002JC001702, which extends KPP to deal with enhanced 
vertical diffusivity near the bottom. But the original KPP does not 
include this effect.

Martin

On Jun 20, 2005, at 3:17 PM, Dimitris Menemenlis wrote:

> Jean-Michel,
>
>> How does KPP deal with bottom friction ? Does it increase bottom 
>> viscosity as it should ?
>
> KPP does not deal with bottom friction in any special way, at least not
> in the MITgcm implementation.  Also I don't recall any special 
> treatment
> of bottom boundary layer in the Large et al. 94 and 97 papers.
>
>> One thing that looks strange to me is not to apply the bottom stress
>> only in the bottom level (because it is supposed to go there).
>
> Don't worry, I do not intend to touch that stuff.  It is way, way 
> beyond my level of competence (as are most things ;-).  From your 
> message and from my understanding of the code, it seems that current 
> MITgcm bottom stress formulation is highly defficient.  I wonder what 
> GFDL and NCAR do about this?  Wasn't Sonya experimenting with improved 
> bottom friction parameterizations?
>
> Dimitris
>
> -- 
> Dimitris Menemenlis <menemenlis at jpl.nasa.gov>
> Jet Propulsion Lab, California Institute of Technology
> MS 300-323, 4800 Oak Grove Dr, Pasadena CA 91109-8099
> tel: 818-354-1656;  fax: 818-393-6720
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