[ncl-talk] Write grib2 to netcdf

[john koudelka]

I'll do my best to answer, Dennis, Alan, and Rick helped me through a
similar question several months back when I was first learning.


First, I get an error when trying to read your file, maybe it got corrupted
when I downloaded? Try the following and see if you get the error.

ncl 0> grib_in=addfile("aod.2014100400.grb","r")

getpdstemplate: PDS Template 4.48 not defined.

warning:Error unpacking GRIB record section 4.

fatal:Could not open (aod.2014100400.grb)

ncl 1>



Secondly,
reading a grib and writing to netcdf can be as simple as:
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
grib_in=addfile("myFile.grb","r")
var=grib_in->VARIABLE
ncdfOut=addfile("out.nc","c")
ncdfOut->VARIABLE_OUT=var

Where:
  myfile.grb is your grib file
  VARIABLE is the variable in the file you wish to output
  out.nc is the name of the netcdf file you desire
  VARIABLE_OUT is the name that you want to show up as the variable in the
netcdf file you're outputting.



john



On Wed, Oct 8, 2014 at 10:41 AM, Partha Bhattacharjee <pbhatta2 at jhu.edu>
wrote:

>  ​Forgot to add information about my earlier question. I am using NCL
> 6.2.1.
>
>
>  Partha
>  ------------------------------
> *From:* ncl-talk-bounces at ucar.edu <ncl-talk-bounces at ucar.edu> on behalf
> of Partha Bhattacharjee <pbhatta2 at jhu.edu>
> *Sent:* Wednesday, October 8, 2014 11:39 AM
> *To:* ncl-talk at ucar.edu
> *Subject:* [ncl-talk] Write grib2 to netcdf
>
>
> I was using slightly modified form of an example in NCL page
> https://www.ncl.ucar.edu/Applications/gribeff.shtml to convert grib2 file
> to netcdf. However, ncl cannot read the time information from input grib2
> file and stops where "initial_time​" is mentioned. Grib2 file and ncl code
> are attached. Any help is appreciated.
>
>
>   Thanks.
>
>  Partha
>
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