[MITgcm-devel] depressed Eta and sIceLoad

[Martin Losch]

Even if NCEP/CORE precipitates too much in the southern ocean, i  
don't think that this is the sole problem, as you get snow over open  
water in the Arctic in regions with seaonal ice cover. The Antarctic  
is basically all season ice cover, isn't it? So I think that the  
problem is really related to the seasonal ice cover. Anyway the model  
needs to deal with ice over open water ...

HEFF_MAX: I thought this had to do with the adjoint. Normally ice  
model seem to have such a line. I am indifferent about that. The  
unrealistic HEFFs occur where the ice gets "stuck", right? I wouldn't  
worry about that too much.

Won't do anything today, as I have a proposal to write, but tomorrow,  
if others provide feedback.

Martin
On 26 Oct 2006, at 16:24, 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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