[MITgcm-support] Problem with Kelvin wave speed

[Eleanor Anne O'Rourke]

Hi Martin,

Thank you very much for the advice - my Kelvin waves are now looking much closer to theory.

Thanks again for your time,

Eleanor

Eleanor O'Rourke
Proudman Oceanographic Laboratory
Joseph Proudman Building
6 Brownlow Street
Liverpool
L3 5DA
Direct line: +44 (0)151 795 4951
>>> Martin.Losch at awi.de 03/27/08 2:07 PM >>>
Hi Eleanor,

it looks like the model is still runing in some sort of asynchronos  
mode? I would do is this:
replace in data
>  deltaTmom = 550.0,
> #tauCD =     172800.,
>  deltaTtracer= 550.0,
>  deltaTClock = 3600.0,
> # if you are using a version later than checkpoint45d on the main  
> branch
> # you can uncomment the following line and increase the time step
> # deltaTtracer and deltaTClock to 172800.0 as well to speed up the
> # asynchronous time stepping
> # deltaTfreesurf = 172800.0,
with
deltaT = 550.0,
and turn off the rbcs pkg to exclude a further source of error but  
first look at inital adjustment waves.
the global_ocean.90x40x15

Martin

On 27 Mar 2008, at 10:08, Eleanor Anne O'Rourke wrote:
> Dear all,
>
> I am having problems simulating Kelvin waves which travel at the  
> correct speed.  I am using the global 90x40x15 example but with  
> resolution at 0.2deg to resolve the Kelvin waves adequately and a  
> 120x10 domain.  My setup is a two layer box with the top layer at  
> 15C and the bottom at 5C.  The forcing is through a rbcs  
> temperature relaxation in the top left corner of the domain  
> including a sponge surrounding the forcing region.
>
> My theoretical calculations suggest a Kelvin wave speed of around  
> 3.5ms-1 with the above set up but currently my model simulated  
> waves are travelling at less than 1ms-1.
>
> Any help would be very much appreciated.  I have attached my data  
> and data.rbcs files.
>
> Thanks,
>
> Eleanor
>
> Eleanor O'Rourke
> Proudman Oceanographic Laboratory
> Joseph Proudman Building
> 6 Brownlow Street
> Liverpool
> L3 5DA
> Direct line: +44 (0)151 795 4951
>
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