[MITgcm-support] restart simulations using pickup files

[kaveh Purkiani]

Thanks a lot, Martin.
It is solved.
Kaveh

On Mon, Dec 3, 2018 at 4:49 PM Martin Losch <Martin.Losch at awi.de> wrote:

> remove
>
> > baseTime=0.,
> >  startTime=0.,
>
> from the namelist.
>
> M.
>
> > On 3. Dec 2018, at 16:46, kaveh Purkiani <kavehpurkiani at googlemail.com>
> wrote:
> >
> > Dear Martin,
> >
> > Thank you for your reply, I still did not get what you mean.
> >
> > Here is the parameter of the first simulation
> > &PARM03
> >  nIter0=0
> >  baseTime=0.,
> >  startTime=0.,
> >  endTime=86400,
> >  deltaT=12,
> >  abEps=0.1,
> >  momDissip_In_AB=.FALSE.,
> >  pChkptFreq=0,
> >  chkptFreq=86400,
> >  dumpFreq=7200,
> >  monitorSelect=2,
> >  monitorFreq=100.,
> >  periodicExternalForcing=.TRUE.,
> >  externForcingPeriod=7200.,
> >  externForcingCycle =2505600.,
> >  &
> >
> > and here is the data file for restarting the model
> > &PARM03
> >  nIter0=7200, ----> 86400/12
> >  baseTime=0.,
> >  startTime=0.,
> >  endTime=86400,
> >  deltaT=12,
> >  abEps=0.1,
> >  momDissip_In_AB=.FALSE.,
> >  pChkptFreq=0,
> >  chkptFreq=86400,
> >  dumpFreq=7200,
> >  monitorSelect=2,
> >  monitorFreq=100.,
> >  periodicExternalForcing=.TRUE.,
> >  externForcingPeriod=7200.,
> >  externForcingCycle =2505600.,
> >  &
> >
> > The only change I did is nIter0 from 0 to 7200
> >
> > regards,
> > Kaveh
> >
> >
> > On Mon, Dec 3, 2018 at 4:36 PM Martin Losch <Martin.Losch at awi.de> wrote:
> > HI Kaveh,
> >
> > as you found out yourself, the model gets confused about the forcing. I
> think that this is so, because you set baseTime and StartTime=0 which is in
> conflict with nIter0=7200.
> > Assuming you don’t change the time step between pickups, all you should
> change is nIter0.
> >
> > Martin
> >
> > > On 3. Dec 2018, at 14:34, kaveh Purkiani <kavehpurkiani at googlemail.com>
> wrote:
> > >
> > > Hi,
> > > I am trying to run a simulation (with a total length of 2 days) using
> a restart file after the first day. The model is forced laterally by U, V,
> Temp and Salt.
> > > The only modifications I did are renaming the pickup files and
> changing the nIter0 to the proper number to be able to start the simulation
> of the second day. The model works well with no error message but, the
> results are surprising to me.
> > > In the attached figure, two simulations for v component velocity for
> the same location are shown (red: with restart and black: normal run
> without restarting). On the first day, they are identical and they should
> continue the same but, the red line (run using restart files) starts
> deviating right after applying the pickup files.
> > > From comparing the simulations it seems to me that model reads the
> pickup file properly, but the forcing is different.
> > > Similar differences are seen in other properties e.g., Temp, Sal and U
> component.
> > >
> > > I've done different tests to figure out where does this error come
> from but no success.
> > > Here is the PARAM3 in the data and everything else remains exactly
> similar for these two simulations!
> > >
> > >  &PARM03
> > >  nIter0=7200, ----> 86400/12
> > >  baseTime=0.,
> > >  startTime=0.,
> > >  endTime=86400,
> > >  deltaT=12,
> > >  abEps=0.1,
> > >  momDissip_In_AB=.FALSE.,
> > >  pChkptFreq=0,
> > >  chkptFreq=86400,
> > >  dumpFreq=7200,
> > >  monitorSelect=2,
> > >  monitorFreq=100.,
> > >  periodicExternalForcing=.TRUE.,
> > >  externForcingPeriod=7200.,
> > >  externForcingCycle =2505600.,
> > >  &
> > >
> > > Any help is really appreciated.
> > > Kaveh
> > >
> > >
> > >
> > >
> > > <Restart.pdf>_______________________________________________
> > > MITgcm-support mailing list
> > > MITgcm-support at mitgcm.org
> > > http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support
> >
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