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

[Perry, Aaron @ LSC]

Hi Greg,

Ron's suggestion actually solved the problem! It turns out that my longitude settings were -80 -60  instead of say 280 320. All the data is plotting perfectly now. I'm guessing that the nps projection requires the lons to be in that format instead of the latlon -60, etc values...

Thank you again for all of your help!



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
________________________________
From: gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on behalf of Greg West [gwest at eos.ubc.ca]
Sent: Tuesday, March 25, 2014 7:32 PM
To: gradsusr at gradsusr.org
Subject: Re: [gradsusr] Unable To Open Concatanated Regional GEM GRIB2s With GrADS

Aaron,

That is odd. I tried downloading a single 15km ugrd10m file. I ran 'g2ctl.pl<http://g2ctl.pl> CMC_reg_UGRD_TGL_10_ps15km_2014032512_P012.grib2 > temp.ctl' and 'gribmap -i temp.ctl'. In grads, I typed 'open temp.ctl' and then 'd ugrd10m' (without setting any x, y, z, or t dimensions), and it plots fine. Below are the contents of the ctl file. You can compare it to yours.

Also, here is the webpage with the 15km grid grib info: http://weather.gc.ca/grib/grib2_reg_15km_e.html
It includes information about which fields are on a different grid (I had speculated incorrectly about the ABSV being one of them).

Greg

--

dset ^CMC_reg_UGRD_TGL_10_ps15km_2014032512_P012.grib2
index ^CMC_reg_UGRD_TGL_10_ps15km_2014032512_P012.grib2.idx
undef 9.999E+20
title CMC_reg_UGRD_TGL_10_ps15km_2014032512_P012.grib2
* produced by g2ctl v0.0.8.4
* command line options: CMC_reg_UGRD_TGL_10_ps15km_2014032512_P012.grib2
* griddef=1:0:(493 x 399):grid_template=20:winds(grid): polar stereographic grid: (493 x 399) input WE:SN output WE:SN res 8 North pole lat1 32.548976 lon1 225.380416 latD 60.000000 lonV 249.000000 dx 15000.000000 m dy 15000.000000 m:winds(grid)

dtype grib2
pdef 493 399 nps 175.042904194139 398.997601209195 249.000000 15
xdef 2511 linear 0.000000 0.135012822779769
ydef 485 linear 24.541011 0.134966987628866
tdef 1 linear 00Z26mar2014 1mo
zdef 1 linear 1 1
vars 1
UGRD10m   0,103,10   0,2,2 ** 10 m above ground U-Component of Wind [m/s]
ENDVARS

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