[gradsusr] Curious why UGRDprs does not display properly inGrADS -data from new MSC CMC regional model

[Wesley Ebisuzaki]

Lewis,

   Your ctl file was created by g2ctl version 0.0.4n 6/2009.   The next
version of g2ctl
fixed the problem with the polar stereographic.  I made a minor change to
g2ctl 5 minutes ago
so that that the longitudes can wrap around.   Never encountered that
problem because our
common polar stereographic grids don't include the north pole.

      Wesley



On Wed, Jul 18, 2012 at 1:18 PM, Poulin,Lewis [CMC]
<Lewis.Poulin at ec.gc.ca>wrote:

> Hi David
>
> I should have mentioned in my note that we interpolate from the raw
> native grid onto a polar sterographic (PS) grid and then we produce
> grib2 from the PS data. I then use grads to view the data. We do not yet
> use staggered levels in our regional model. That is coming probably in
> 2013.
>
> Lewis
>
> -----Original Message-----
> From: gradsusr-bounces at gradsusr.org
> [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Ryglicki, David CIV
> FNMOC
> Sent: 18 July, 2012 13:05
> To: GrADS Users Forum
> Subject: Re: [gradsusr] Curious why UGRDprs does not display properly
> inGrADS -data from new MSC CMC regional model
>
> Hey, Lewis.
>
> Is the CMC model run on a C-grid? If it's staggered, then GrADS won't
> see it with the scalars (i.e., pressure) the same way. Sounds like the
> CMC output is raw. Someone on the list might have a solution - I always
> had the model I used interpolate winds to the scalar grid. Wasn't energy
> conserving, but made plotting a heck of a lot easier.
>
> David Ryglicki
> N3 - Models Team
> 702/146
> x4519
>
> ________________________________
>
> From: gradsusr-bounces at gradsusr.org on behalf of Poulin,Lewis [CMC]
> Sent: Wed 7/18/2012 9:46 AM
> To: gradsusr at gradsusr.org
> Subject: [gradsusr] Curious why UGRDprs does not display properly in
> GrADS -data from new MSC CMC regional model
>
>
>
> Hello GraDS community.
>
> The Meteorological Service of Canada is running in parallele its next
> generation of its regional deterministic model. The new model runs on a
> 10km grid and will eventually replace the operational 15km model
>
>
> As part of our tests we produce grib2 files of its data.  We want to
> make sure users will be able to process grib2 data in packages like
> GrADS
>
>
> I have found that parameters of the type TMPprs 850 display well on the
> full grid and on a portion of the grid
>
> However, the UGRDprs 850 parameter does not appear to display correctly.
> (here am only using UGRDprs but applies to VGRDprs also)
>
>
> I placed my data and images displaying the problem in directory at:
> http://collaboration.cmc.ec.gc.ca/cmc/cmoi/grads/regional10km/
> <http://collaboration.cmc.ec.gc.ca/cmc/cmoi/grads/regional10km/>
>
> The images there show how data displays in grads on full and portions of
> the grid
>
> If you wish to test data or reproduce the images
>
> - Go to : http://collaboration.cmc.ec.gc.ca/cmc/cmoi/grads/regional10km/
> <http://collaboration.cmc.ec.gc.ca/cmc/cmoi/grads/regional10km/>
> - Copy the grib2 ctl idx reg_test (and possibly cbarn.gs) to your
> account
> - Start grads
> - run the commands in the file reg_test
> - Images of full grid and portion of grid will be made
>
> Am looking for advice to understand why UGRDprs 850 does not display
> properly in GrADS
>
> Thanks in advance
>
> Lewis Poulin
> MSC-CMC Dorval, Qc
>
>
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