About the open boundary condition

[liangliang]

hi:
I want add the free-surface boundary conditions on the open boundary.I konw that it is contained in the bry.nc.But in the bry.nc,there are many other variables ,for example,'ubar,vbar,u,v,temp,salt'.
If i want add the free-surface boundary condition,which cpp option should be activated?
whether is only the 'zeta' used in the bry.nc,and the other variables can be ignored?
Thanks!

[kate]

It depends. The boundary conditions I use want both zeta and ubar/vbar. I'm using the Chapman/Flather combination for the depth-integrated mode.