[MITgcm-support] THSIce noisy/unphysical output

[Jean-Michel Campin]

Hi Patrick,

Could you send (in attachement) the full set of parameter files
(main parameter file "data" and all the other data.* files)
as well as SIZE.h (since you try several tile domain decomposition)
that correspond to the figure you sent ?
Right now, it's difficult to guess where the noise comes from.

Also, on the figure you sent, can you confirm that the amplitude of 
the noise in ice thickness is about 0.0172 - 0.0156 = 0.0016 m ?

Cheers,
Jean-Michel

On Fri, Nov 07, 2014 at 05:05:21PM +0000, Patrick Watts wrote:
> Hi MITgcmers,
> 
> I have been running the model in a coupled setup, with ocean, a CheapAML atmosphere, and using the THSIce model. The resolution is very high (20m in all directions) and the setup is idealised, essentially a doubly periodic box.
> 
> The output of the ice model is extremely noisy, with a pattern repeating for each tile (see attached for an example). I have tried changing the time step, minimum ice thickness, and mask of the ice model, as well as the fortran optimisation, number of tiles, and the number of grid points overlapping between tiles - the pattern has changed and there can be larger variations in ice thickness overlying it, but nothing so far has actually got rid of it.
> 
> Absolutely any suggestions of what the root cause could be or how I can try to get rid of it are appreciated.
> Thanks,
> Patrick


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