[ncl-talk] NCL to replace CDO

[Karin Meier-Fleischer]

Hi Marston,

as I'm also working in the CDO consultancy here in Hamburg, I would like 
to have a closer look at your IFS file, too, to see if the CDO version 
1.8.2 could handle it.

If the file is not too large you can attach it to an 'offline' email to 
me or upload it creating a new request on 
https://code.mpimet.mpg.de/projects/cdo/boards/1 .

Thanks in advance,
Karin

Am 27.06.17 um 20:49 schrieb Marston Johnston:
>
> Hi,
>
> For years I’ve been using CDO to convert ECMWF’s IFS grib files to 
> netcdf and converting it from reduced Gaussian grid to regular lat lon.
>
> But CDO has not kept up the pace with updates and they do not respond 
> to many questions.
>
> Therefore, I’m attempting to move this part of my processing chain to NCL.
>
> I’m using NCL 6.5 (beta) to read the grib file (see attached log 
> file). There 1 or 2 problems and then I have a question.
>
> 1.)My NCL script is not finding the experimental variables in the grib 
> file. These variables are given the generic names varXXX where XXX can 
> be between 88 and 111, for example.
>
> 2.)The script also doesn’t find the 3D records. I’m not sure how NCL 
> finds these records in the grib file and then lists them as a 3D 
> (time,lev,lat,lon), not counting the time.
>
> 3.)If 1 and 2 can be resolved, how can I then convert the reduced 
> Gaussian grid to regular lat lon? Would ESMF work if I setup a regular 
> lat lon grid?
>
> Appreciate your thoughts on this.
>
> /M
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Marston S. Johnston, PhD
>
> Department of Earth Sciences
>
> University of Gothenburg, Sweden
>
> Email: marston.johnston at gu.se <mailto:marston.johnston at gu.se>
>
> SkypeID: marston.johnston
>
> Phone: +46-31-7864901
>
> Only the fruitful thing is true!
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
>
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-- 
Dipl. Geophys. Karin Meier-Fleischer
Visualization, NCL, CDO
Application Support

Deutsches Klimarechenzentrum GmbH (DKRZ)
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Phone:    +49 (0)40 460094 126
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