[MITgcm-support] Setting appropriate start time after changing model resolution

[Martin Losch]

Hi Roland,

I don’t think that it is possible to have a “warm start” at nIter0>0 without pickup files. 

This is tricky: You could try to create pickup files from your input fields. The pickup file does not contain anything else, except that everything is real*8 and there are a few more tendency fields (which could be set to zero). Have a look at read/write_pickup.F to see in which oder you need save the fields for a pickup.

Martin

> On 29 Jan 2015, at 13:59, Roland Young <young at atm.ox.ac.uk> wrote:
> 
> Hi,
> 
> I have a run where I want to change the spatial resolution of the output and then continue the run. In a previous post I was advised to produce binary input files for U, V, Temp, S, and Eta at the new resolution and then start a new run with these binary files using the PARM05 namelist. I have produced the binary files at the new resolution and that is fine.
> 
> My question is: is it possible to preserve the model time and iteration number in the continued run, or must these begin again from zero? I tried to start the run with niter0 set to the iteration number of the input as obtained at the end of the original run, but I get MDS_READ_FIELD errors as I am not using a pickup file to continue the run. I would like to preserve the model time and iteration number as otherwise the combined set of output files will have overlapping iteration numbers in their filenames.
> 
> Thanks,
> 
> Roland
> 
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