[MITgcm-support] how to balance the flow flux during preprocessing

[Dustin Carroll]

Hi Tongya,

Set useOBCSbalance=.TRUE. in your data.obcs file to balance the net flow across all open boundaries.

You can also control the behavior of individual open boundaries with OBCS_balanceFacN/S/E/W. 
See section 6.3.1.5.6 in the documentation for how to set the flags for this parameter.

Cheers,
Dustin


> On Jan 3, 2015, at 7:30 PM, liutongya13 at mails.ucas.ac.cn wrote:
> 
> Hi all,
> I am running a experiment wiht open boundary conditons and have read many previous emails about the obcs. In these emails I realised that I should do something to balance the flow flux during preprocessing in order to avoid large or small SSH. But how to do it? Just magnify or minish the entire U(W&E) or V(N&S) of a boundary ? Is there some feasible methods to balance the flow flux?I wonder the balance that just change a component of velocity will affect the model result.
> 
> In my case, there are three boundaries(E,S,N). The NEC flow into the field from eastern boundary and Kuroshio flow out of the field from the north boundary. If I use the OBCS_balance, how should I set these parameter?
> 
> Any avdice is high appreciated!
> 
> Tongya Liu
> 
> 
> 
> 
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