[MITgcm-support] constant surface temperature boundary condition

[Ryan Abernathey]

Ronald,

One way you can approximate a constant temperature bc is to use surface
temperature relaxation with a very fast relaxation time. To do this, you
specify a relaxation time scale in your data file in the PARM03 section,
e.g.
 tauThetaClimRelax=  5184000., # time in seconds = two month relaxation
timescale
To approximate a constant temperature, you would use a value close to your
actual timestep (i.e. much smaller than two months). This would force the
temperature back to the climatology at every timestep.
Then you just have to specify an input file in the PARM05 section. e.g.
  thetaClimFile=  'lev_sst.bin',
I assume you know how to create these binary files if you have already run
the tutorials.

Perhaps someone else knows a better way to do this, but I can't think of
one that doesn't involve hacking the model code a bit.

-Ryan



On Mon, Aug 19, 2013 at 5:30 AM, zsucxr at gmail.com <zsucxr at gmail.com> wrote:

> **
>  Dear All,
>
> I am learning the verification/tutorial_deep_convection case. Now I want
> to test a similar case with constant temperature (20 degree, for
> example) applied at the sea surface. As the tutorial only
> demonstrates setting surface heat flux, I wonder if it is possible to
> realize constant temperature boundary condition in MITgcm.
>
> Any suggestion will be appreciated.
>
> --
> Ronald Cen
>
> ------------------------------
>
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