[MITgcm-support] EXCH2 grid parameters

[Martin Losch]

Michael,

it's totally unclear to me, what you are looking for.

without the mnc pkg (netcdf), you'll get file-pairs *.data/meta that contain the grid including the cell face areas (RAC.meta,RAC.data,RAS.*, RAW.*,.), also coordinats (XC,YC,XG,YC) an many more.
if you have useSingleCPUio, you get one file-pair per variable. if not, you get a pair per tile and variable. You can use matlab to read these files (that's what the meta files are for).

with the mnc-pkg, this information is written into a file grid.t$tilenmb.nc for each tile. For simple topologies (not cubed sphere grids), you can use utils/scripts/gluemnc to glue these tiles together.

What are you looking for? What are "true" grid parameters, and "wrong" coordinates?

Martin


On Nov 1, 2011, at 7:34 PM, Michael Siccha wrote:

> Dear all,
> I am running a regional oceanic model using MPI and the EXCH2 package
> (single facet, just for the blank tile feature).
> I am unable to find an output of the "true" grid parameters like grid
> cell coordinates and face areas with this configuration. In the
> generated grid data files ('XC', 'YC', etc.) the parameters are
> calculated using only the data in SIZE.h, where all tiles are organized
> in nPx only, same for the parameter listings in the standard output
> files (STDOUT.x); the individual tiles have the "wrong" coordinates and
> face areas. How can I obtain an output of the "correct" global grid
> parameters with EXCH2 ? I am using the variable 'rA' in some code
> modifications and would want to make sure I am using the correct values.
> Many thanks in advance
> Michael Siccha
> 
> -- 
> Dr. Michael Siccha
> Institute of Earth Sciences
> The Hebrew University of Jerusalem
> Edmond J. Safra Campus, Givat Ram
> Jerusalem, 91904
> Israel
> 
> 
> 
> 
> 
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