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

[Poulin,Lewis [CMC]]

Wesley, 
 
We have installed the updated version of g2ctl and the issue with the longitudes near the north pole is resolved. 
 
I posted UGRD images with "ok" in the filename to show it is now working. Those images are also at: 
http://collaboration.cmc.ec.gc.ca/cmc/cmoi/grads/regional10km/

Thank you very much for your assistance. 

   Lewis

Centre météorologique du Canada | Canadian Meteorological Centre
Service météorologique du Canada | Meteorological Service of Canada
2121 route Transcanadienne voie de service | 2121 Trans Canada service road
Dorval, QC H9P 1J3
Lewis.Poulin at ec.gc.ca
Téléphone | Telephone 514 421-7266
Télécopieur | Facsimile 514 421-4679 



________________________________

From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Wesley Ebisuzaki
Sent: 18 July, 2012 14:57
To: GrADS Users Forum
Subject: Re: [gradsusr] Curious why UGRDprs does not display properly inGrADS -data from new MSC CMC regional model


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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