[MITgcm-support] appropriate OBCS conditions for free boundary

[Martin Losch]

Hi Dan,

how do you want your northern boundary to behave? If you just want waves to radiate (and not reflect) then orlanski bcs might work the best. Adding a sponge layer will also damp any signal and suppress reflection.

In general it’s possible to have different bcs for north, east, west (and southern) boundaries.

Martin

> On 10. Nov 2017, at 20:55, Daniel Goldberg <dngoldberg at gmail.com> wrote:
> 
> Hello all
> 
> I am setting up an experiment on an idealised continental shelf with an ice shelf at the southern boundary. I will impose OBCS velocities at the east and west boundaries; i would like the northern to be open but not to specify any velocities. Is this possible? Is this the right application for a wave/radiation condition? Would specifying an orlanski condition via obcs be the appropriate thing to do?
> 
> Many thanks
> Dan
> 
> -- 
> 
> Daniel Goldberg, PhD
> Lecturer in Glaciology
> School of Geosciences, University of Edinburgh
> Geography Building, Drummond Street, Edinburgh EH8 9XP
> 
> 
> em: Dan.Goldberg at ed.ac.uk
> web: http://ocean.mit.edu/~dgoldberg
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support