R: [MITgcm-support] Bug in the domain decomposition periodicity

[Gianmaria Sannino]

Hi Chris,

the problem I found is not related to the PRISM coupling.
Coupling is working without problem.
This problem rises with the grid refinement: Mediterranean + a refinement in
the strait of Gibraltar region.
For the fine model I need to specify at the OBs: tracers, velocities and
also the surface elevation (I'm running both models with nonlinear free
surface). This OBcs are transferred via MPI from the coarse model (after a
proper interpolations) to the fine model directly in the obcs_calc.F
routine, so the flag obcs_prescribe is set off.
At this point if I impose to MPI the non periodic conditions (as modified by
me), the refinement works well otherwise I see some noises on the boundaries
for the velocity fields.


gianmaria






-----Messaggio originale-----
Da: mitgcm-support-bounces at mitgcm.org
[mailto:mitgcm-support-bounces at mitgcm.org] Per conto di chris hill
Inviato: mercoledì 31 maggio 2006 14.49
A: mitgcm-support at mitgcm.org
Oggetto: Re: [MITgcm-support] Bug in the domain decomposition periodicity

Hi G.,

  Thanks.

  The code is set to always be periodic. Even when a domain is not 
periodic the code acts as if it is periodic in the MPI bits. Masks 
and/or obcs overrides are used to get the numerics to be non-periodic.

  So it shouldn't go through those lines, except if you hack code in 
eeset_parms.F (not recommended).

Chris

P.S. Any news on the PRISM interface bits you were hoping to check in?


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