[gradsusr] Unable To Open Concatanated Regional GEM GRIB2s With GrADS

[Greg West]

Aaron,

>From your script it looks like you're grabbing the 15km GEM. The 15km used
to give me the same problem though. If you run g2ctl.pl on the concatenated
grib2 file, it will give you one grid description. The problem is that I
believe that's just based on the first field it encounters, and there might
be another field in the concatenated file that's on a different grid. I
think I download all of those fields except ABSV, and since that's a
derived field, I would suspect it might be the one on a different grid. I
would recommend downloading your usual files, but leaving them in their
separate grib2 files (1 field per file). Then pick a forecast time and run
each file through g2ctl.pl and see what grid description it gives you. The
ctl file generated for the ABSV file might be different from the others.

If ABSV is the problem field, an alternative to making a separate ctl file
just for that field would be to not download it, and instead calculate it
from the u and v winds.

Greg

____________________________
Greg West, PhD
Postdoctoral Fellow
Weather Forecast Research Team
University of British Columbia
EOS-Main 224
GWest at eos.ubc.ca
--
Meteorologist
Hydrology & Technical Services
BC Hydro
Greg.West at bchydro.com

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Message: 3
Date: Mon, 24 Mar 2014 22:49:45 +0000
From: "Perry, Aaron @ LSC" <Aaron.Perry at lsc.vsc.edu>
Subject: Re: [gradsusr] Unable To Open Concatanated Regional GEM
        GRIB2s  With    GrADS
To: GrADS Users Forum <gradsusr at gradsusr.org>
Message-ID:
        <DEE427CC71C1184E9F7C903BF1EEE7A80B65D4BC at LSC-EX10MBX03.lsc.vsc.edu>
Content-Type: text/plain; charset="iso-8859-1"

Hi Greg,

Thank you very much for chiming in! I've been using the usual
http://dd.weatheroffice.gc.ca/model_gem_regional/10km/grib2/ datasource to
pull the GRIB2s and then run them through g2ctl/gribmap.

Truly stumped right now...



Onward and Upward,

Aaron D. Perry
Atmospheric Sciences
Lyndon State College
Class of 2016
Boston, MA
Twitter: @AaronPerryLSC<https://twitter.com/AaronPerryLSC>
Mobile: 617-780-4312
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