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

[Matthew Mazloff]

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> 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
> 
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