[MITgcm-support] advection scheme for T/S

[samar khatiwala]

Martin, good to hear I am not the only one. (FYI: I use
the nonlimited DST3 (30) rather than the limited one (33).)

Also, what makes you think that the 2d order centered scheme
is giving the "true" answer? We are comparing one FD scheme
against another.

Samar

On Mon, 20 Sep 2004, Martin Losch wrote:

> steady state is very different from the case with the default advection
> scheme. I have refrained from using 33 or 77 for temperature and
> salinity since. (o:
>


> Martin
>
> On Sep 17, 2004, at 2:36 PM, Jean-Michel Campin wrote:
>
> > Hi Samar,
> >
> > The results could be significantly different between Centered, 2nd
> > order
> > with AB2, and DST3.
> > For a passive tracer, the differences will be larger at high CFL
> > number, more diffuve with DST3 and more dispersive with 2nd.O.
> > Now, when you allow feedbacks to the dynamics (an active tracer
> > like temperature), you can get different results even at small CFL,
> > but in this case, it might be mainly due to vertical advection.
> >
> > This is all I can say at this point.
> >
> > See you,
> >
> > Jean-Michel
> > _______________________________________________
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>
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