[MITgcm-support] Problems with OBCS package

[Matthew Mazloff]

Velocity field looks fine to me. Which component is that? What specifically is wrong with it?
1) is there grid scale noise - if so what is your CFL?
2) I assume you have stratification (your figure 1) and those are internal tides - no? I can’t even see your colorbar in figure 2
3) you can    useOBCStides = .TRUE., instead of putting them in OBWu and they will likely be smoother. What is your  obcsWperiod - this is likely an issue

Matt

 

> On Oct 27, 2020, at 8:35 AM, Павел Лобовиков <plobovikov at gmail.com> wrote:
> 
> Hi folks!
> 
> I need to simulate the evolution of the tide in an ocean section with the following topography (picture in attactment).
> 
> I've tried to use the OBCS package for this objective.
> 
> My grid has the following dimensions: (Nx,Ny,Nz) = (2600 x 1 x 384).
> 
> I have a file with a distribution of horizontal speed in time (inside is an array with 1 x 384 x Time dimension).
> 
> My data.obsc file has the following content:
> 
>  &OBCS_PARM01
> # This flag turns off checking and fixing problematic topography across 
> # open boundaries.
>  OBCSfixTopo=.TRUE.,
> 
>  OB_Iwest = 1,
>  OB_Ieast = -1,
>  useOBCSprescribe = .TRUE.,
>  OBWuFile = 'OB_WestU.bin',
>  OBCS_monSelect = 1,
>  &
> 
> But in the end I do not get all what I expect..
> 
> The velocity field immediately filled with sharp jumps (picture in attachment).
> 
> What did I miss and do wrong? 
> 
> My data file in attachment as well.
> 
> 
> Thanks, Pavel!
> <topography.jpg><velocity.jpg><data>_______________________________________________
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