[MITgcm-support] OBCS north/south and periodic east/west?

[Dimitris Menemenlis]

north and southern boundaries are 25, right, not 250?

On Apr 11, 2014, at 12:19 PM, Yun Xu <yunx at uci.edu> wrote:

> Hi Scott, 
> 
> try:
> OB_Jnorth=   240*-1,
> OB_Jsouth=    240*1,
> 
> Yun
> 
> On Apr 11, 2014, at 12:05 PM, S. Bachman <sb965 at cam.ac.uk> wrote:
> 
>> Hi all,
>> 
>> I seem to be having trouble getting MITgcm to run with OBCS enabled on the northern and southern boundaries and just leaving the east and west periodic.  I've undefined ALLOW_OBCS_EAST and ALLOW_OBCS_WEST in OBCS_OPTIONS.h, and am reading in the N/S boundaries from file.  My domain is 240x25x60 divided into 10 tiles (24 points each) in the zonal direction.  My data.obcs looks like this:
>> 
>> # ***************
>> # Open boundaries
>> # ***************
>> &OBCS_PARM01
>> OB_Jnorth=   24*-1,
>> OB_Jsouth=    24*1,
>> 
>> #
>> useOrlanskiNorth=.FALSE.,
>> useOBCSsponge=.FALSE.,
>> useOBCSbalance=.FALSE.,
>> useOBCSprescribe=.TRUE.,
>> #
>> OBNuFile='UVEL_north.bin',
>> OBNvFile='VVEL_north.bin',
>> OBNtFile='THETA_north.bin',
>> OBNsFile='SALT_north.bin',
>> 
>> OBSuFile='UVEL_south.bin',
>> OBSvFile='VVEL_south.bin',
>> OBStFile='THETA_south.bin',
>> OBSsFile='SALT_south.bin',
>> 
>> but I'm getting an error at startup
>> 
>> (PID.TID 0000.0001) *** ERROR *** S/R OBCS_CHECK: Inside Mask and OB locations disagree :
>> (PID.TID 0000.0001) *** ERROR ***  from insideMask (bi,bj=  1,  1) expects OBE=    1 @ j=    1
>> (PID.TID 0000.0001) *** ERROR ***  from insideMask (bi,bj=  1,  1) expects OBW=   24 @ j=    1
>> (PID.TID 0000.0001) *** ERROR ***  from insideMask (bi,bj=  1,  1) expects OBE=    1 @ j=   25
>> (PID.TID 0000.0001) *** ERROR ***  from insideMask (bi,bj=  1,  1) expects OBW=   24 @ j=   25
>> (PID.TID 0000.0001) *** ERROR *** OBCS_CHECK:     8 errors in OB location vs Mask
>> (PID.TID 0000.0001) *** ERROR *** S/R ALL_PROC_DIE: ending the run
>> 
>> This is really confusing because OBCS isn't even enabled on the E/W boundaries, so I'm not sure whether I should be adding something to my data.obcs or if something else is going on here.  I also noticed that it is calling for OBE and OBW at the corner points of the tile only, if that means anything.
>> 
>> Any help would be greatly appreciated, thanks!
>> Scott