[MITgcm-support] Error with Arctic configuration and runoff file

[Jean-Michel Campin]

Hi Alessandro,

Sorry, it's not very clear to me: 
- do you want to use the model (pkg/exf) to also interpolate the run-off ?
  In this case, runoff_interpMethod should be set to 1 (the default) and
  you should specify runoff_nlat-1 values for  runoff_lat_inc , like:
>   runoff_lat_inc    = 179*1.,
>   runoff_nlat       = 180,
  Note that this is different from: runoff_lat_inc=179., (only 1 value instead
   of 179 values all equal to 1)
Or, 
- if you don't want the model to interpolate the run-off (I think this is 
  what was used in the original set-up you pointed to), you should
  explicitly set runoff_interpMethod = 0 and provide a run-off file that
  match the model grid (and will change from one resolution to the other).
  You can check the size of the file, which I assume should be, with runoffperiod = -12,
    Nx*Ny*12*4  with exf_iprec=32
    Nx*Ny*12*8  with exf_iprec=64
  where Nx,Ny are model grid size from SIZE.h

Cheers,
Jean-Michel

On Thu, Feb 18, 2016 at 10:00:41AM +0000, gmail wrote:
> Hello everybody,
> thank you very much for the suggestions.
> 
> I have changed runoff_interpMethod  to 1, but this keeps giving me the same "attempt to access non-existent record,??? error
> 
> However, I have noticed that when I use: 
> >>>>  runoff_lon0       = 0.50D0,
> >>>>  runoff_lon_inc    = 1.0D0,
> >>>>  runoff_lat0       = -89.5D0,
> >>>>  runoff_lat_inc    = 1.,
> >>>>  runoff_nlon       = 360,
> >>>>  runoff_nlat       = 180,
> 
> both with runoff_lat_inc    = 1., and runoff_lat_inc    = 179., as someone suggested, I get a different error:
> 
> forrtl: severe (19): invalid reference to variable in NAMELIST input, unit 11, file /tmp/fortxB52Va, line 53, position 12
> 
> I suppose this is related to the lines I add because without those lines and the runofffile ones the model runs fine.
> 
> Alessandro
> 
> > On 17 Feb 2016, at 18:27, Dimitris Menemenlis <dmenemenlis at gmail.com> wrote:
> > 
> > if you use a 360x180x12 forcing file, then you need:
> > 
> > &EXF_NML_04
> >  runoff_interpMethod = 1,
> > 
> > (which is the default value)
> > 
> >> On Feb 17, 2016, at 10:19 AM, gmail <mozzatoale at gmail.com <mailto:mozzatoale at gmail.com>> wrote:
> >> 
> >> Hi matt, 
> >> Thanks for the suggestion,  I forgot to mention my data.exf is configured for:
> >> runoff_interpMethod = 0,
> >> The runoff is indeed a 12 month climatology.
> >> In my tests I have tried the configuration you suggest and the same error is thrown.
> >> All the best,
> >> 
> >> Alessandro
> >> 
> >>> On 17 Feb 2016, at 18:09, Matthew Mazloff <mmazloff at ucsd.edu <mailto:mmazloff at ucsd.edu>> wrote:
> >>> 
> >>> Hello
> >>> 
> >>> Is your runoff input a 12 month climatology without need for interpolation. If so you need only:
> >>> 
> >>> In   &EXF_NML_02
> >>> runoffperiod      = -12,
> >>> and obviosly set runoffFile
> >>> 
> >>> and in  &EXF_NML_04
> >>>  runoff_interpMethod = 0,
> >>> 
> >>> That works for me...
> >>> 
> >>> Matt
> >>> 
> >>> 
> >>> 
> >>>> On Feb 17, 2016, at 9:45 AM, gmail <mozzatoale at gmail.com <mailto:mozzatoale at gmail.com>> wrote:
> >>>> 
> >>>> Dear MITgcm users,
> >>>> 
> >>>> I am currently running an Arctic configuration of the MITgcm in 3 different resolutions: 36km, 18km and 9km.
> >>>> I started using the ERA  dataset for forcing and all three worked fine. 
> >>>> 
> >>>> I have now switched to the CORE2 dataset forcing and setup my data.exf following the one I found here:
> >>>> http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/global_oce_llc90/input.core2/ <http://mitgcm.org/viewvc/MITgcm/MITgcm_contrib/gael/verification/global_oce_llc90/input.core2/>
> >>>> 
> >>>> This new setup works fine on the 36km configuration producing satisfying results.
> >>>> The problems arise with the 9km and 18km configuration. More specifically the problem seems to be related to the runoff.
> >>>> Both configurations throw the following error:
> >>>> 
> >>>> forrtl: severe (36): attempt to access non-existent record, unit 9, file /hpcdata/scratch/am8e13/CORE_data/runoff-corev2_360x180x12.bin
> >>>> 
> >>>> Here is a copy of my data.exf:
> >>>> https://github.com/AlessandroMozzato/notebooks/blob/master/data.exf <https://github.com/AlessandroMozzato/notebooks/blob/master/data.exf> 
> >>>> 
> >>>> I have checked the file in MATLAB and it seems fine and with the right dimensions.
> >>>> I have also tried to substitute the runoff from the CORE dataset with the runoff from the ERA dataset and the same error is produced. 
> >>>> I have tried both of these setups for the data.exf:
> >>>> 
> >>>>  runoffstartdate1  = 19470115,
> >>>>  runoffstartdate2  = 120000,
> >>>>  runoffperiod      = 2628000.0,
> >>>>  runoffperiod      = 2592000.0,
> >>>> 
> >>>> and:
> >>>> 
> >>>>  runoffperiod      = -12,
> >>>> 
> >>>> Finally I have added the following lines to the data.exf
> >>>> 
> >>>>  runoff_lon0       = 0.50D0,
> >>>>  runoff_lon_inc    = 1.0D0,
> >>>>  runoff_lat0       = -89.5D0,
> >>>>  runoff_lat_inc    = 1.,
> >>>>  runoff_nlon       = 360,
> >>>>  runoff_nlat       = 180,
> >>>> 
> >>>> It is also worth noticing that removing the runoff file from data.exf solves the problem and the model runs fine. 
> >>>> I suspect this could be an easy fix but I couldn???t figure it how.
> >>>> 
> >>>> Every suggestion would be greatly appreciated!
> >>>> 
> >>>> All the best,
> >>>> Alessandro
> > 
> > 
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
> 

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