[MITgcm-support] arbitrary tiles in cube-sphere grid

[Yuan Lian]

Hi,

I have a question about setting arbitrary tiles in cube-sphere grid. I 
don't have any problems using the regular six-tile configuration. 
However, there are "patchy" values (more obvious in vertical or 
meridional velocity) near the corners of subtiles if I use the following 
SIZE.h

       PARAMETER (
&           sNx =   8,
&           sNy =   4,
&           OLx =   4,
&           OLy =   4,
&           nSx =   1,
&           nSy =   1,
&           nPx =  12,
&           nPy =   4,
&           Nx  = sNx*nSx*nPx,
&           Ny  = sNy*nSy*nPy,
&           Nr  =  56)

It appears that either EXCH2 routine or Shapiro filter does not work 
properly in this case.

Does anyone also notice the problem?

Best regards,
Yuan