[MITgcm-support] SSS restoring in selected regions

[Jean-Michel Campin]

Hi,

I forgot to mention something about lambdaThetaFile/lambdaSaltFile:
It seems that the way it has been implemented, to use lambdaSaltFile,
you will still need to specify, 
a) if not using pkg/exf ALLOW_CLIMSST_RELAXATION :
  tauSaltClimRelax = (any positive value)
 in "data", namelist PARM03
b) if using pkg/exf ALLOW_CLIMSST_RELAXATION:
  climsstTauRelax = (any positive value)
 in "data.exf", namelist EXF_NML_02
even if these values are not used.
Otherwise, it looks like no surface relaxation will be applied
(can check the value of "doSaltClimRelax" which is printed in 
the "Model configuration" summary, in STDOUT file).

And the same applies to lambdaThetaFile with
tauThetaClimRelax (not exf) or climsssTauRelax (with exf) setting.

Cheers,
Jean-Michel

On Thu, Oct 02, 2014 at 08:28:41AM -0400, Jean-Michel Campin wrote:
> Hi Dan,
> 
> There is a parameter "latBandClimRelax" to limit SSS & SST relaxation
> to latitude (in absolute value) lower than latBandClimRelax.
> This is not what you want, relaxation in high southern latitude,
> but you can also specify the strength of relaxation (in second^(-1))
> as a 2-D field that is read in from a file:
>  lambdaThetaFile=
>  lambdaSaltFile=
> in namelist "PARM05" in the main parameter file "data".
> The 2-D field that is loaded from these file will overwrite the
> uniform (default) value 1/tauThetaClimRelax & 1/tauSaltClimRelax
> 
> Cheers,
> Jean-Michel
> 
> On Thu, Oct 02, 2014 at 11:03:42AM +0100, Dan Jones wrote:
> > Hello dear support list,
> > 
> > I am currently using the EXF package to restore the surface salinity of my
> > Southern Ocean model to a monthly climatology.  I am doing this in order to
> > discourage the formation of polynyas and the subsequent onset of deep
> > convection in the Weddell and Ross seas.  The SSS restoring works, but
> > since I restore at each surface grid cell, the restoring process alters the
> > salinity of mode waters.
> > 
> > Is it possible to use EXF to only restore in a selected region (e,g, south
> > of the Polar Front, south of a given latitude)?  If this is not already
> > built into EXF, is there a place in the source code where I could place a
> > simple "if, then" statement to only restore south of a given latitude?
> > 
> > Many thanks,
> > Dan
> > 
> > ---------------------------------------------------------
> > 
> > Dr Dan Jones
> > British Antarctic Survey, NERC
> > Cambridge, UK
> > 
> > Phone: +44 (0)1223 221505
> > Fax: +44 (0)1223 362616
> > Skype:  dcjones.work
> > 
> > ---------------------------------------------------------
> 
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
> 
> 
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