[MITgcm-support] Time steps - Barotropic and baroclinic

[Martin Losch]

Hi Massimo,

you can modify the experiment in any way you like (o: Haft the vertical layers with probably cut the run time in half, but your vertical resolution will be much poorer. If that does not matter …

Using different deltaTtracer .ne. deltaTmom (and deltaTclock = deltaTtracer and deltaTfreeSurf=deltaTtracer) turns on the "tracer acceleration". See the appropriate literature for the benefits and consequences (e.g. Bryan, 1970, Danabasoglu, 2004?). Examples are in verification/global_ocean.90x40, and many others.

Martin


On Feb 9, 2013, at 10:50 PM, Massimo Novello (Yahoo) <massimonovello at yahoo.com.br> wrote:

> Please, I'm running an adapted exp4 experiment and it is taking almost 24h to model 3 days. In atempt to improve the performance can I remove the "deltatT" variable from data" file and use only detaTtracer as baroclinic time step and deltaTmom as barotropic time steps? If it is correct to run in this way I will try to reduce the deltaTtracer times stamp.
> 
> I will also reduce the number of z-levels from 10 to 5 levels.
> 
> Thanks for your help,
> Massimo Novello
> 
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