[MITgcm-support] documentation about OBC Orlanski and Balance Flow

[Martin Losch]

Hi Camille,

there is some documentation about the obcs package here: <http://mitgcm.org/public/r2_manual/latest/online_documents/node236.html> 
There is very little about the Orlanski option but at least it points you to some examples (the verification experiments that Matt mentioned).

I often use the Stevens BCs, which are some kind of mixture of prescribe values and a radiation condition. For purely radiative BCs, the Orlanski option is probably the best.

Martin

> On 28 Jan 2016, at 16:52, Camille Mazoyer <mazoyer at univ-tln.fr> wrote:
> 
> Dear all,
> I just start using MITgcm as I will use it during my thesis for creating a configuration on the rade de Toulon, France.
> Currently, I'm trying to understand how open boundary conditions work, with these two steps:
> - orlanski scheme wich seems to be a predictor step, if I understand well, where we use the pression of the previous step. We calculate velocities, temperature and salinity we will have to correct during the next step
> - use of balance flow wich seems to be a corrector step of these variables (Is this right?)
> I only find a few explanations in the doc (mainly explaining the CPP Key). I also have read the paper of Orlanski, 1976.
> Would you have more documentations / publications about the method used in the MITgcm (orlanski and balance flow)? (about the numerical part, or the method, ...)
> 
> Thank you very much for your help,
> Camille Mazoyer
> 
> -------------------------------
> 
> Camille Mazoyer
> Phd Student
> Mediterranean Institute of Oceanography (MIO)
> Université de TOULON
> Bat X - CS 60584
> 83041 TOULON cedex 9
> France
> http://mio.pytheas.univ-amu.fr/
> 
> 
> 
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