[MITgcm-support] rbcs and obcs

[Jody Klymak]

Hi all,

I'd like to use rbcs instead of obcs to force internal wave problems, largely because rbcs will allow me to specify a propagating wave inside my sponge, whereas obcs only forces to a single value along the boundary (which can be extended into the interior in a sponge, but not as a propagating wave).

However, I'm curious what will happen if I specify a velocity u next to my boundary and the boundary (either solid or periodic) has zero velocity.  Will that set up a big divergence in the surface height that will cause barotropic waves? 

Do I need to specify those boundaries as open and use obcs to make the conditions match the rbcs conditions?  verification/expt4 seems to do this, so I assume thats the case, but thought I'd ask before spending the time to set both up.

Thanks a lot,  Jody


--
Jody Klymak    
http://web.uvic.ca/~jklymak/