[MITgcm-devel] Seaice wind-stress diagnostics

[Jean-Michel Campin]

Hi Martin,

I added diagnostics of wind-stress over seaice and also the
seaice fraction weighted wind stress over ocean+seaice.
If you (or any one) found someting curious (not unlikely since I did 
not check too much) or has some suggestion, don't hesitate.

I also remove SIfu & SIfv diags (duplicates), and also SIuwind,SIvwind
that I found confusing (since the corresponding variables belong to 
pkg/exf); for now, kept SIempmr, SIqnet, SIqsw.

Note that there is a good reason for having diagnostics of ocean net surface 
fluxes within pkg/thsice since this pkg is used in atmospheric config and
in this case, the main model surface-fluxes diag are not active.
In the case of pkg/seaice, the reason is not so clear ...

Cheers,
Jean-Michel

On Fri, Mar 10, 2017 at 02:49:59PM +0100, Martin Losch wrote:
> Hi Jean-Michel,
> 
> you are absolutely right SIfu/fv are duplicates and we don???t need them (if fu and fv are diagnosed ***after*** calling seaice_model, which seems to be the case.). Similar: SIempmr, SIqnet, SIqsw (-oceFWfx, -oceQnet)
> 
> I don???t think that we have a diagnostics for sea-ice-atmosphere stress. 
> The atmosphere sea ice stress is calculated in seaice_get_dynforcing and stored in taux/tauy, which are fields local to pkg/seaice and can be easily included in seaice_model? Or do it in seaice_get_dynforcing?
> 
> Martin
> 
> > On 9 Mar 2017, at 17:02, Jean-Michel Campin <jmc at mit.edu> wrote:
> > 
> > Hi Martin and others,
> > 
> > I was looking for a diagnostics of wind-stress over seaice,
> > but I don't think we currently have one (although there are many
> > diagnostics available within pkg/seaice, and I sometime get lost there).
> > 
> > Initially, after reading the "description" (from: available_diagnostics.log), 
> > I thought that these 2 (SIfu,SIfv) would be what I was looking for:
> > 'SEAICE zonal surface wind stress, >0 increases uVel '
> > 'SEAICE merid. surface wind stress, >0 increases vVel'
> > but there are simply an exact copy  of model main diagnostics: oceTAUX & oceTAUY
> > (exactly from the same FFIELDS.h arrays fu & fv), i.e., the ocean surface stress 
> > and not the seaice wind-stress.
> > 
> > It's not very clear to me why we need these duplicate diagnostics,
> > but if we want to keep SIfu,SIfv, would suggest to change the description 
> > to avoid confusion.
> > 
> > Also I think it would be useful to have a seaice wind-stress diagnostics
> > (if it does not already exist ?).
> > 
> > Cheers,
> > Jean-Michel
> > 
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> 
> 
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