[MITgcm-support] restart from a pickup file

[Jean-Michel Campin]

Hi Abbas,

On Thu, Mar 26, 2009 at 06:32:48PM -0400, Abbas Dorostkar wrote:
> Dear all,
> 
> I am trying to simulate the whole internal wave field in a lake.  My initial
> simulation was performed for 10 days (270 to 280 Julian Day) in the
> hydrostatic version of MITgcm with fine grids.  Performing the same
> simulation in the non-hydrostatic mode is impractical as it takes several
> months.
> 
> As a first option, I am thinking about running the nonhydrostatic model for
> a time span (from 272-274 days) compatible with the response to a particular
> wind event (when internal wave activity is visible in the field data). To
> initialize the nonhydrostatic model, I restarted it with the pickup file I
> got from the hydrostatic simulation on 272 Julian Day. However, I get this
> error message:” field phi-NHyd is missing”.  Is it ok if I put zeros for
> phi-Nhyd in the pickup file and restart the model?  The structure of the
> pickup file (data-meta file) is not easy to understand. Has anybody done
> this before?

I suggest to try:
 pickupStrictlyMatch=.FALSE.,
in the 3rd namelist (PARM03) of parameter file "data"
(see, e.g., verification/ideal_2D_oce/input/data)
This should allow you to restart from an Hydrostatic pickup.

Jean-Michel

> 
> As a second option, I want to run the nonhydrostatic model with a
> coarse grid for the whole period and then interpolate from that coarse
> grid to a finer grid
> and restart from a pickup file.  Does anybody have a matlab script or
> a subroutine that does this.
> 
> 
> 
> Your help is much appreciated.
> 
> Abbas

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