[ncl-talk] GRIB2 reading

[David Brown]

Hi Debasish,
You are correct that NCL has not been updated to completely understand
the templates for atmospheric chemical constituents and aerosols, and
is therefore misinterpreting this piece of metadata as "generating
process type". Fixing this will require updates to the NCL C source
code and will take a bit of work.
All I can suggest for now is that you look at the relevant table (in
this case it is actually table 2.333 -- AEROSOL TYPE -- see
http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_table4-233.shtml)
and reinterpret the numbers given for generating process type based on
the entries in that table:

62000 Total Aerosol
62001 Dust Dry
62006 Sulphate Dry
62008 Sea Salt Dry
62009 Black Carbon Dry
62010 Particulate Organic Matter Dry

We will try to fix this as soon as possible.
 -dave

On Fri, Apr 24, 2015 at 10:28 AM, Debasish Hazra
<debasish.hazra5 at gmail.com> wrote:
> I have posted it yesterday about having difficulty reading grib2 file in ncl
> v6.2/6.3 (see the email below). Someone pointed that,
> "generating_process_type" list should be updated to table 4.230  instead of
> table 4.3, which is currently specified. Any help how to do that.
>
>  Thanks.
>  Debasish
>
> On Thu, Apr 23, 2015 at 1:37 PM, Debasish Hazra <debasish.hazra5 at gmail.com>
> wrote:
>>
>> Hi,
>>
>>  I was trying to read a grib2 file in ncl (v6.2) and after doing
>> ncl_filedump of the file I found mismatch between variable names compare to
>> reading them in wgrib2. I have attached the file (~500 kb) along with this
>> email. ncl_filedump it gives a warning :
>>
>> warning: Entry (62001) not found in code table file
>> /u/Debasish.Hazra/ncl_620/lib/ncarg/grib2_codetables/ncep/4/4.3.table
>>
>>  Any help, thanks.
>>
>>  Debasish
>>
>>
>>
>>
>
>
>
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