[MITgcm-support] obcs and linear free surface

[Martin Losch]

Hi there,
I have another question about the OBCS-package:
I use a linear free surface and observe that the variable eta along the 
open boundary is not what I expect it to be. In particular there is a 
strong discontinuity between boundary value and interior and I have the 
impression that this discontinuity develops first in eta and then in 
the verlocities. Of course, I cannot expect this transition to be 
perfectly smooth, but on the other hand the pressure solver should, in 
principle, produce smooth solutions. So here's my question to those you 
have a little more overview over OBCS than I have: Is eta=ssh directly 
influenced by the open boundaries other than by means of a changed 
velocity field? I can't find any place where this could happen. (I am 
only talking aboth the LINEAR free surface.)

blue-eyed,
Martin