[MITgcm-support] KPP diffusivities

[Stefano Querin]

Hi Dimitris and Martin,
as suggested by Dimitris, I tested the option:
#define EXCLUDE_KPP_SHEAR_MIX

The diffusivity maxima observed at the bottom disappeared! I still have some other questions about the relation between surface sw fluxes and bottom shear instabilities, but, before asking your advice, I would like to go a bit deeper into this topic, which is rather new to me. For the moment, thanks a lot!

Cheers,

Stefano


----- Original Message ----- 
From: "Dimitris Menemenlis" <menemenlis at sbcglobal.net>
To: <mitgcm-support at mitgcm.org>
Sent: Tuesday, November 01, 2005 1:41 AM
Subject: Re: [MITgcm-support] KPP diffusivities


>> at least at first sight, 
>> those peaks did not seem to be correlated with bottom velocities (which are 
>> also very very small, expecially before the wind event)
> 
> Not bottom velocity, but vertical shear divided by stratification the 
> quantity that matters.
> 
>> Martin, maybe the KPP scheme can't be applied to such a kind of configuration 
>> (I hope it can, also because I think that vertical variability in turbulence 
>> parameters can be very useful to my studies...).
> 
> I asked question to Bill Large once ... he said KPP was designed to work 
> independent of vertical discretization.  But I don't think that he had 
> the regime that you are working in in mind.
> 
> D.
> 
> -- 
> 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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>
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