[MITgcm-support] L4rdt

[Dimitris Menemenlis]

David, does necessity to pump up viscA4grid also carry over to  
viscA4GridMax?

Specifically, for the CS510 configuration we use
  viscC4Leith=1.5,
  viscC4Leithd=1.5,
  viscA4GridMax=0.5,

Recently I have noticed a little more grid scale noise than before but  
it is hard
to separate this from other modifications to code and model  
configuration

Do I need to increase  viscA4GridMax by about 30%, as per Martin's  
email,
to recover previous set up?

Thanks, Dimitris

On Jul 31, 2009, at 1:02 PM, David Ferreira wrote:

> Martin,
> I put a note in the tag-index about the L4rdt fix !
> Surely, everybody reads it regularly...
> Anyway, the viscosity at the corner points were 4 times those at the
> center points, so
> the "effective" viscosity was larger than intended. And indeed, with  
> the
> new code, it will
> probably be necessary to pump up a bit viscA4grid.
> That said, I don't think that L4 was changed by the code modification,
> only L4rdt.
> Are you sure there is not something else going on ?
> Cheers,
> david