[Mitgcm-support] RE: problems with periodic boundary conditions?

[mitgcm-support at dev.mitgcm.org]

Did you turn off beta (variations in f) when you switched to doubly
periodic?

A.

> -----Original Message-----
> From: Martin Losch [mailto:mlosch at awi-bremerhaven.de]
> Sent: Wednesday, May 07, 2003 11:03 AM
> To: support at mitgcm.org
> Subject: problems with periodic boundary conditions?
> 
> 
> Hi,
> 
> I have set up a zonally periodic channel, in which I want to create
> instabilities. I use the linear implicit free surface. In 
> order to avoid 
> boundary effects, I have tried a run in which I removed the 
> northern and 
> southern wall as well: double periodic domain. But now the mean sea 
> surface (dynstat_eta_mean) fluctuates with an amplitude of 40m (5000m 
> total water depth). Also the tracers are no longer conserved. 
> Has anyone seen this behavior before? What is going on?
> 
> Martin
> 
> --
> Martin Losch
> Alfred Wegener Institute for Polar and Marine Research
> Postfach 120161, 27515 Bremerhaven, Germany;
> Tel./Fax: ++49(0471)4831-1872/1797
> 
>