[MITgcm-support] Offset Periodic Boundaries

[Martin Losch]

Hi Ryan,

I don’t think that this is implemented. The current implementation would just connect c (lhs) to a (rhs), all other boundary points would encounter solid walls in the wrap-around.

You’d have to modify the exchange routines to accomplish what you want.

Martin

> On 13. Sep 2018, at 14:32, Patmore, Ryan D. <ryapat30 at bas.ac.uk> wrote:
> 
> Hi all,
>  
> I am exploring the possibility of having a model setup with spatially offset periodic boundaries along the vertical to the ‘east’ and ‘west’ of my domain. As far as I am aware there is no implementation for this within MITgcm. Am I correct with this assumption and/or has anyone tried this before?
>  
> To (hopefully) clarify the problem I want to have a domain set-up which looks a little like this:
>  
>      _ _ _ _ _  
>     |         | 
>     |         ~ c
>     |         ~ b
>   c ~         ~ a
>   b ~         |
>   a ~         |
> z    - - - - -
> ^ 
> | 
> -   > x
>  
> where -, _ and | represent solid boundaries/sea surface and ~’s are the connected periodic boundaries. The communication is aligned by some arbitrary offset with alignment denoted by the letters in the diagram. 
>  
> Cheers,
> Ryan
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