[ncl-talk] NCL to replace CDO

[David Brown]

Hi Marston,
Do you get errors when you read this file? Can you let us know where
to get a sample IFS grib file similar to the one you sent the dump
for? Thanks.
 -dave

On Tue, Jun 27, 2017 at 12:49 PM, Marston Johnston <shejo284 at gmail.com> wrote:
> 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
>
> SkypeID: marston.johnston
>
> Phone: +46-31-7864901
>
> Only the fruitful thing is true!
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
>
>
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