[MITgcm-support] How does MITgcm handle the 2D problem
Jean-Michel Campin
jmc at ocean.mit.edu
Fri Dec 7 00:11:49 EST 2012
Hi Li,
The way a 2-D (x-z or y-z) set-up works is quiet simple,
there is just 1 grid point in the missing direction (respectively, y or x),
still periodic along this direction, therefore all gradients
are zero; there is no boundary in the missing direction,
and the 2 horizontal components of the velocity are stepped forward
(so that coriolis effects are accounted for).
Does this answers your question ?
Cheers,
Jean-Michel
On Thu, Dec 06, 2012 at 05:09:34PM -0800, q li wrote:
> Hi,
>
> I'm confusing about how the MITgcm handles the 2D runs, after receiving a comment from a paper reviewer.
>
> For example, in the "verification/internal_wave" case, tidal forcing is in east-west direction. delY=5.E3 in the "data" file means only 1 grid in y-direction?
> On the north/south boundary, how come u and v are set to be zero? Does it mean u and v have to disappear in the whole domain?
>
> Could anyone give me some hints?
>
> Thanks,
>
> Li
>
> "verification/internal_wave/code/obcs_calc.F"
>
>
> C Northern OB, template for forcing
> IF (useOrlanskiNorth) THEN
> CALL ORLANSKI_NORTH(
> & bi, bj, futureTime,
> & uVel, vVel, wVel, theta, salt,
> & myThid )
> ELSE
> DO K=1,Nr
> DO I=1-Olx,sNx+Olx
> OBNv(I,K,bi,bj)=0.
> OBNu(I,K,bi,bj)=0.
> OBNt(I,K,bi,bj)=tRef(K)
> OBNs(I,K,bi,bj)=sRef(K)
> #ifdef ALLOW_NONHYDROSTATIC
> OBNw(I,K,bi,bj)=0.
> #endif
> ENDDO
> ENDDO
> ENDIF
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