[MITgcm-support] Re：Re: OBCS errors in OB location vs Mask

[Dustin Carroll]

Hi Liu,

You’ll have more control if you specific your solid boundaries in your land mask (i.e., depths of 0 in bathy.bin)

You can control which open boundaries are enabled in OBCS.h,

 C Enable individual open boundaries
#define ALLOW_OBCS_NORTH
#define ALLOW_OBCS_SOUTH
#define ALLOW_OBCS_EAST
#define ALLOW_OBCS_WEST

The default BC’s in MITgcm are double periodic. Also, note that the default tracer fields (T and S) at the boundaries are 0, so if you’ll want to prescribe those to match your domain.

Cheers,
Dustin



On Sep 14, 2014, at 4:32 AM, 刘成彦 <killy at nuist.edu.cn> wrote:

> 
> Dear Carroll and Michael
>  
> Thank you for your help so much.
>  
> Re Carroll:
> I have checked my values for sNx,sNy & nPx,nPy in the SIZE.h file.
> sNx =  80,
> sNy =  80,
> nPx =  8,
> nPy =  8,
> It means that I would use 64 CORES to run this experiment with grids points of 640*640.
> I also set useOBCS =.TRUE. In data.pkg
>  
> Re Michael:
> I do think your suggestions are proper answer to my problem. But my model cannot been
> integrated for only step due to this problem here. So I cannot get the hFac[WS]. Indeed, I want
>  to overcome this problem by a simple way, setting the southern boundary as a solid wall!
> In fact, the topography in Prydz bay in the southern boundary is also depicts as land entirely
> without ocean.
> In my data.obcs, I have set the solid wall property for the Southern boundary as follows:
> 
> OB_Jsouth =   640*0,
> 
> (I think ’640*0’ denotes there is no open boundary here, but it seems does work.
> If I am wrong, how to set it as solid wall?)
>  
> Again, thanks both of you a lot!
> Cheers
> Yours sincerely Liu
> 
> 
> 
> ----------------
> *********************************************
> Dr. Chengyan Liu
> Nanjing University of Information
> Science & Technology
> No.219, Ningliu Road, Nanjing, Jiangsu,
> China(Postcode: 210044)
> Phone: 18251854735
> E-Mail: killy at nuist.edu.cn
> 
> *********************************************
>  
> 
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