[MITgcm-support] Problem with Obcs when simulating tide

[Matthew Mazloff]

I think you are setting up waveguides. This is a tough one to solve. 

You mention configurations from previous works - maybe you could start with one of those?

Matt


> On May 22, 2023, at 1:35 AM, 张瑞杰 <322199003 at stu.ouc.edu.cn> wrote:
> 
> Dear all:
> I am trying to simulate internal waves. I found some problem and i do not known how to solve it.
> The problems are as follow:
> (1) When i use Tpxo to force ITs at the boundary using obcs_add_tides.F, i first found that the speeds 
> normal to the boundary at E/N are the same as those at W/S. I realise that this is due to the periodicity 
> of domain. So i set the outmost area of domain to have depth 0 to supress periodicity. 
> However, from the papers i read and several configurations (from others),
> i found they all use open boundary. So, even the result of my configuration looks fine, i'm still wandering if i am doing the right things.
> 
> (2) In the run i described above, i didn't add sponge layer. Once i added it, i found strange u,v and Eta value near the boundary.
>  The configuration of sponge are as follow:
>  spongeThickness=10,
>  Vrelaxobcsinner=8888.8,
>  Vrelaxobcsbound=88.888,
>  Urelaxobcsinner=8888.8,
>  Urelaxobcsbound=88.888,
>  I modify the Sponge.F to output the value of the tendency array (gU_arr), the value looks fine.
>  So what might caused the problem? How can i solve it?
> Best regards,
> Rj
> 
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