[MITgcm-support] cubed sphere: init format, subdomains and tiles

[Jean-Michel Campin]

Hi Maura,

Few things:
> I have compiled the 2 experiments with the corresponding  W2_EXCH2_SIZE.h and 
> w2_e2setup.F files, obtained by driver.m. 
You don't need to generate theses files (see top of the file:
MITgcm/utils/exch2/code-mods/README); might need a parameter file "data.exch2"
only if you have blank tiles or non regular (i.e., with faces of different
size) cube-sphere grid.

The way you generate input files seems OK to me (one of the simplest example
of a matlab script that is used to generate input file on regular CS-grid is: 
MITgcm/verification/adjustment.cs-32x32x1/input.nlfs/gendata.m).
And if you use MITgcm/utils/matlab/rdmds.m to read in your output files, 
in both cases, the loaded array should come with a [60*6 60 nr] shape.

The reason why your output files have not the same shape (after using rdmds.m)
might be related to the old W2_EXCH2_SIZE.h + w2_e2setup.F files you are using.

Cheers,
Jean-Michel

On Mon, May 07, 2012 at 02:41:32PM +0200, Maura BRUNETTI wrote:
> Dear MITgcm users, 
> 
> I am testing different cubed sphere configurations. I have constructed initial conditions in the 
> format (60x6x60) (i.e. bathymetry [60 6 60], Levitus climatology [60 6 60  nr=15], ncep files 
> and Levitus relaxation [60 6 60 nt=12]): in the first experiment, I use 6 procs (sNx =sNy =60, 
> nSx =1, nPx=6), while in the second experiment I use 24 procs (sNx = sNy = 30,  nSx =1, nPx =24). 
> Thus, the subdomain dimension (sNx,sNy) and the number of tiles change in the 2 experiments. 
> I have compiled the 2 experiments with the corresponding  W2_EXCH2_SIZE.h and 
> w2_e2setup.F files, obtained by driver.m. 
> 
> Since I obtain different results with the 2 configurations, I am trying to understand where the error 
> is ... Is it correct to use the same initial files in the format (60x6x60) for the 2 experiments? 
> 
> At the end of the second experiment, I obtain arrays of the format (720x30) (for example, 
> the temperature has the following dimension: [720 30 15 4] after 4 output). So they are not in 
> the standard format (60*6 60). I have found a possible way to convert this format in the standard 
> one, but I am not sure that it is correct... Is there a matlab file which properly reshape the array in 
> the standard format (just using t = reshape(t,[360 60 15 4]) is not sufficient...)
> 
> Cheers, 
> 
> Maura
>  
> 
> --
> Dr. Maura Brunetti
> Institute for Environmental Sciences (ISE)
> University of Geneva -- Switzerland
> 

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