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[GEMPAK #CYW-235722]: gdcross question

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  • Subject: [GEMPAK #CYW-235722]: gdcross question
  • Date: Tue, 20 Nov 2012 11:18:35 -0700
Ok, I believe I know what the issue is.

GDCROSS uses the surface elevation grid contained in GDFILE.  For the nam212, 
using GDINFO, I see the following:


GEMPAK-GDINFO>l
 GDFILE   = $MODEL/nam/2012112012_nam212.gem
 LSTALL   = YES
 OUTPUT   = T
 GDATTIM  = all
 GLEVEL   = 0
 GVCORD   = none
 GFUNC    = hght
 GEMPAK-GDINFO>r

  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
  565     121120/1200F000                          0         NONE HGHT        
 1278     121120/1200F003                          0         NONE HGHT        
 1933     121120/1200F006                          0         NONE HGHT        
 2567     121120/1200F009                          0         NONE HGHT        
 3243     121120/1200F012                          0         NONE HGHT        
 3862     121120/1200F015                          0         NONE HGHT        
 4490     121120/1200F018                          0         NONE HGHT        
 5136     121120/1200F021                          0         NONE HGHT        
 5821     121120/1200F024                          0         NONE HGHT        
 6498     121120/1200F027                          0         NONE HGHT        
 7153     121120/1200F030                          0         NONE HGHT        
 7791     121120/1200F033                          0         NONE HGHT        
 8411     121120/1200F036                          0         NONE HGHT        
 9084     121120/1200F039                          0         NONE HGHT        
 9717     121120/1200F042                          0         NONE HGHT        
10425     121120/1200F045                          0         NONE HGHT        
11048     121120/1200F048                          0         NONE HGHT        
11682     121120/1200F051                          0         NONE HGHT        
12366     121120/1200F054                          0         NONE HGHT        
13008     121120/1200F057                          0         NONE HGHT        
13680     121120/1200F060                          0         NONE HGHT        
14337     121120/1200F063                          0         NONE HGHT        
14984     121120/1200F066                          0         NONE HGHT        
15647     121120/1200F069                          0         NONE HGHT        
16318     121120/1200F072                          0         NONE HGHT        
16934     121120/1200F075                          0         NONE HGHT        
17589     121120/1200F078                          0         NONE HGHT        
18226     121120/1200F081                          0         NONE HGHT        
18889     121120/1200F084                          0         NONE HGHT    


Can you check that these grids exist in the file you're using for GDFILE?  My 
guess is that they are not there.  If they are, something else is amiss.

Michael


> I just ran that same script for LAX to DEN. Still no surface. See attached 
> ago_test.gif-
> 
> Additionally, when I run gdprof on the same nam212 file, it is plotting data 
> down to 1000mb regardless of station surface elevation. See attached DNR 
> soundings.
> 
> --
> Darren R. Clabo
> South Dakota State Fire Meteorologist
> O: (605) 394-1996  M: (605) 381-9253
> address@hidden
> http://www.ias.sdsmt.edu/clabo/index.htm
> 
> 
> -----Original Message-----
> From: Unidata GEMPAK Support [mailto:address@hidden]
> Sent: Tuesday, November 20, 2012 10:41 AM
> To: Clabo, Darren R.
> Cc: address@hidden
> Subject: [GEMPAK #CYW-235722]: gdcross question
> 
> Ah, I see, thanks.
> 
> Using your GDCROSS input I am seeing elevation between CWPL (391 m) and CYMO 
> (9 m) - see attached.
> 
> This being a cross-section across Ontario, there's not much elevation to 
> show.  The filled contours are shown below the surface because of the 
> cross-section interpolation.  If I expand CXSTNS out to LAX>BWI, there are 
> grid points below the surface level which are not interpolated to, though 
> there is some overlap (second attachment).
> 
> Are you using a different CXSTNS definition which does not show the surface?
> 
> -Michael
> 
> > Michael-
> > I am simply using a nam212 gempak file within gdcross to plot
> > potential vorticity and theta. Parameter list is (note gvcord)
> >
> > CXSTNS   = CWPL>CYMO
> > GDATTIM  = f00
> > GVCORD   = pres
> > GFUNC    = pvor(thta,wnd)
> > GVECT    =
> > GDFILE   = /squall1/gempak-data/model/nam/2012111212_nam212.gem
> > WIND     =
> > REFVEC   = 10
> > PTYPE    = log
> > YAXIS    =
> > IJSKIP   = 0
> > CINT     =
> > SCALE    = 6
> > LINE     = 32/1/3
> > BORDER   = 1
> > TITLE    = 1/1
> > CLEAR    = yes
> > DEVICE   = gif|ago.gif|1200;900
> > TEXT     = 1
> > PANEL    = 0
> > CONTUR   = 3
> > FINT     = 1
> > FLINE    = 13-30
> > CTYPE    = f
> >
> > Any other thoughts?
> >
> >
> > --
> > Darren R. Clabo
> > South Dakota State Fire Meteorologist
> > O: (605) 394-1996  M: (605) 381-9253
> > address@hidden
> > http://www.ias.sdsmt.edu/clabo/index.htm
> >
> > -----Original Message-----
> > From: Unidata GEMPAK Support [mailto:address@hidden]
> > Sent: Tuesday, November 20, 2012 8:37 AM
> > To: Clabo, Darren R.
> > Cc: address@hidden
> > Subject: [GEMPAK #CYW-235722]: gdcross question
> >
> > I can confirm that the GDCROSS code is written to only draw surface 
> > elevation when GVCORD is PRES.  I'm trying to make it work for HGHT and 
> > THTA but so far it's not an easy task.  Not the news you wanted to hear, 
> > sorry.
> >
> > Michael
> >
> > > Hi Darren,
> > >
> > > Without seeing the GDCROSS input I'm making a guess about how you went 
> > > about this.  Did you run GDVINT to interpolate to theta levels and then 
> > > run this new grid file through GDCROSS?
> > >
> > > I see what you describe when I plot a linear cross-section of 
> > > temperatures by the HGHT coordinate, though there are only 6 HGHT levels 
> > > for TMPK in the GFS, so the scope is limited, but it does not show a 
> > > surface elevation cross-section at the bottom, like you say.
> > >
> > > I'm guessing that surface elevation is only designed to show for 
> > > GVCORD=PRES.  I'm looking at the source code and will see if I can get it 
> > > to work with height.
> > >
> > > -Michael
> > >
> > >
> > >
> > > > Good day-
> > > > I am working on putting together an isentropic analysis in GDCROSS. 
> > > > However, when I am plotting a cross section from across the CONUS, all 
> > > > of the stations are showing data down to 1000 mb. Considering the 
> > > > elevation of the Intermountain West, I was hoping I could get a plot 
> > > > that resembles what is found on the GEMPAK tutorial page 
> > > > (http://www.unidata.ucar.edu/software/gempak/tutorial/vertical_plotting.html#12.2)
> > > >  where the surface elevation is easily seen.
> > > >
> > > > Any thoughts on what I can do?
> > > >
> > > > --
> > > > Darren R. Clabo
> > > > South Dakota State Fire Meteorologist
> > > > O: (605) 394-1996  M: (605) 381-9253 address@hidden
> > > > http://www.ias.sdsmt.edu/clabo/index.htm
> > > >
> > > >
> > > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: CYW-235722
> > Department: Support GEMPAK
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: CYW-235722
> Department: Support GEMPAK
> Priority: Normal
> Status: Open
> 

Ticket Details
===================
Ticket ID: CYW-235722
Department: Support GEMPAK
Priority: Normal
Status: Open