[MITgcm-devel] depressed Eta and sIceLoad

[Patrick Heimbach]

Martin,

I did exactly the former first
since it was easiest/fastest to do.
And I have set up the latter,
but ran into various other problems
on columbia,
which is why I don't have answer to
this yet (and columbia is fairly full).

-p.



On Thu, 2006-10-26 at 11:57, Martin Losch wrote:
> What did you actually do? If you just run the ECCO model after  
> optimization (that is when the surface fluxes are adjusted so that  
> the near surface salinities are not too bad) and suddenly your EmPmR  
> changes dramatically (with evap*(1-area) the evap contribution under  
> ice is basically zero), I would be surprised if the solution did not  
> deteriorate.
> If, however, you ran the first guess with the unoptimized surface  
> fluxes (which I believe you did), then I am surprised that you have  
> an effect that is so much different from mine.
> 
> Martin
> 
> PS. Just to make sure, the line in question should look like:
> > C NOW GET FRESH WATER FLUX
> >           EmPmR(I,J,bi,bj)= maskC(I,J,kSurface,bi,bj)*(
> >      &         EVAP(I,J,bi,bj)*(ONE-AREA(I,J,2,bi,bj))
> >      &         -RUNOFF(I,J,bi,bj)
> >      &         +SEAICE_SALT(I,J,bi,bj)*0.92 _d 0/SEAICE_deltaTtherm
> >      &         )
> 
> On 26 Oct 2006, at 16:58, Patrick Heimbach wrote:
> 
> >
> > Hi there,
> >
> > could you hold off for another day with
> > putting the EVAP fix.
> > I ran a quick test with ECCO using the
> > EVAP fix, and things looked really bad there.
> > But can't give anything conclusive yet.
> >
> > -p.
> >
> >
> >
> > On Thu, 2006-10-26 at 10:24, Dimitris Menemenlis wrote:
> >> Martin, my vote is to add all the fixes, as you describe in your e- 
> >> mail, without
> >> caring for backward compatibility.  Although I have not yet tried  
> >> it, I agree
> >> that the evap is potentially the most serious bug, especially for  
> >> those
> >> integrations that include Southern Ocean.  Regarding too much snow  
> >> accumulation,
> >> if the problem is with the NCEP or CORE forcing fields, then we  
> >> should be fixing
> >> the NCEP or CORE forcing fields, not the model.
> >>
> >> The link:
> >> http://ecco2.jpl.nasa.gov/data2/cube/cube38/pickup/HSNOW.jpg
> >> is live once again, it was down when you last tried to access it.
> >> This particular cubed-sphere integration is driven by NCEP  
> >> reanalysis.
> >> As Jinlun pointed out the "too-much snow" problem is mostly around  
> >> Antarctica.
> >> In the Arctic it is less of a problem, although there are some  
> >> small regions
> >> with unrealistic 25 m snow around Greenland and in the Canadian  
> >> Archipelago.
> >>
> >> The companion figures to above, that show complete contents of  
> >> seaice_pickup
> >> from same integration and time in Arctic and Antarctic are
> >> http://ecco2.jpl.nasa.gov/data2/cube/cube38/pickup/
> >> pickup_seaiceArctic.jpg
> >> http://ecco2.jpl.nasa.gov/data2/cube/cube38/pickup/
> >> pickup_seaiceAntarctic.jpg
> >> A yet different problem is ice that becomes too thick, up to 25 m  
> >> in some
> >> isolated spots.  Shall we use this same occasion to uncomment
> >>
> >> #ifdef DO_WE_NEED_THIS
> >> c          HEFF(I,J,1,bi,bj)=MIN(MAX_HEFF,HEFF(I,J,1,bi,bj))
> >> #endif
> >>
> >> in growth.F.  We can set a large default MAX_HEFF in  
> >> seaice_readparms.F
> >>
> >> Dimitris
> >> _______________________________________________
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> >> http://mitgcm.org/mailman/listinfo/mitgcm-devel
> > -- 
> > Dr Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
> > MIT | EAPS, 54-1518 | 77 Massachusetts Ave | Cambridge, MA 02139, USA
> > FON: +1-617-253-5259 | FAX: +1-617-253-4464 | SKYPE: patrick.heimbach
> >
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> 
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-- 
Dr Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
MIT | EAPS, 54-1518 | 77 Massachusetts Ave | Cambridge, MA 02139, USA
FON: +1-617-253-5259 | FAX: +1-617-253-4464 | SKYPE: patrick.heimbach