[ncl-talk] NCL to replace CDO

[David Brown]

OK sure I would like samples of both kinds of data. ftp.cgd.ucar.edu
would be easiest for me, but I can do Dropbox as well if you prefer.
 -dave

On Tue, Jun 27, 2017 at 1:20 PM, Marston Johnston <shejo284 at gmail.com> wrote:
> Hi Dave,
>
> One more thing. IFS (OpenIFS) produces 2 kinds of grib: gridpoint and spectral grib files.
> I can provide examples of these.
>
> /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!
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
> On 2017-06-27, 20:58, "David Brown" <dbrown at ucar.edu> wrote:
>
>     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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