[ncl-talk] ESMF_regrid

[Laura Fowler]

Hi Dennis and Kemal:

Kemal and Dennis:
Thank you for taking the time to look at my sourcecode and outputs. I think
that I figured out what was happening with ESMF_regrid. As Kemal suggested,
I was simply running out of memory when running my regrid.ncl script
interactively on cheyenne.ucar.edu. I was able to create the "weights" file
when logging onto casper.ucar.edu instead. I want to look at Kemal script
more carefully as well to make sure that I understand his regridding ncl
script as well.

Many thanks again,
Laura


On Tue, Oct 1, 2019 at 5:55 PM Dennis Shea <shea at ucar.edu> wrote:

> I have looked at your script and the PET0.RegridWeightGen.Log log file.
>
> I 'Googled' the last (unhelpful) message output by esmf_regrid:
> ESMF_regrid_gen_weights: 'ESMF_RegridWeightGen' was not successful
>
> There were several 'hits'. However, none provided any information on what
> causes this message.
> ====
>
> I note that the *destination* grid description file was **successfully**
> generated
>          destination.grid_onCells.5898242.to_0.1deg.nc
>
> However, no *source* grid description file was generated. This is needed
> for the interpolation to proceed.
> Why it is not generated is not obvious. However,  the unstructured grid is
> quite large.
>
>         nVertLevels = 55 ;
>         nCells = 5898242 ;
>         StrLen = 64 ;
>         nEdges = 17694720 ;
>         nVertices = 11796480 ;
>
> You said you  "have successfully used the same script many times in the
> past so I am not sure what the current issue is.
> Have you used it on this unstructured grid?
> I ask, because if you did, you should have the source grid description
> file. You can use that.
>
> Not sure I can offer any more insight.
>
>
> On Mon, Sep 30, 2019 at 8:38 PM Laura Fowler via ncl-talk <
> ncl-talk at ucar.edu> wrote:
>
>> Hello:
>>
>> I have issue with ESMF_regrid to interpolate an unstructured MPAS mesh to
>> a regular 1deg by 1deg latitude-longitude grid, at the step when we
>> generate the weights (see attached regrid.out file and the ncl script
>> regrid.to_CMORPHdata.ncl). I have successfully used the same script many
>> times in the past so I am not sure what the current issue is. Also it is
>> difficult for me to find where ncl crashes in the ESMF sourcecode.
>>
>> The two files and the MPAS mesh are also located in
>> /glade/work/laura/MPASprojects2019/myMPAS-v6.2/initialization.5898242
>>
>> I would really appreciate your help,
>> Thanks,
>> Laura
>>
>>
>>
>> --
>>
>> !-------------------------------------------------------------------------------------------------------------
>> Laura D. Fowler
>>
>> Mesoscale and Microscale Meteorology Division (MMM)
>> National Center for Atmospheric Research
>> P.O. Box 3000, Boulder CO 80307-3000
>>
>> e-mail: laura at ucar.edu
>> phone: 303-497-1628
>>
>>
>> !-------------------------------------------------------------------------------------------------------------
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>

-- 
!-------------------------------------------------------------------------------------------------------------
Laura D. Fowler

Mesoscale and Microscale Meteorology Division (MMM)
National Center for Atmospheric Research
P.O. Box 3000, Boulder CO 80307-3000

e-mail: laura at ucar.edu
phone: 303-497-1628

!-------------------------------------------------------------------------------------------------------------
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