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20031219: 20031218: Gempak - SUN and LINUX - SNCROSS VORTICITY

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  • Subject: 20031219: 20031218: Gempak - SUN and LINUX - SNCROSS VORTICITY
  • Date: Fri, 19 Dec 2003 14:37:59 -0700
>From: "Jason C. Shafer" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200312192131.hBJLVAp2006330

>Steve, 
>
>    I should have been more explicit. Is there a way to generate a grid file 
>from a sounding file where I can do time-height sections on, not plan-view? I 
>want to contour vorticity on a time-height section using the observations. 
>Thanks again. 


Jay,

Yes. Create a grid file (using gdcfil), then run objective analysis on
the sounding levels for each time of your sounding data using OABSND.

Once you have your sounding levels at eash time gridded, you
can use the program GDTHGT to do time height cross sections.


Steve Chiswell




>    
>Jay
>
>>Delivered-To: address@hidden
>>To: "Jason Shafer" <address@hidden>
>>Cc: address@hidden
>>Subject: 20031218: Gempak - SUN and LINUX - SNCROSS VORTICITY 
>>Date: Fri, 19 Dec 2003 12:57:43 -0700
>>From: Unidata Support <address@hidden>
>>
>>>From: "Jason Shafer" <address@hidden>
>>>Organization: UCAR/Unidata
>>>Keywords: 200312190140.hBJ1eQOJ029963
>>
>>>Institution: CIRP / University of Utah 
>>>Package Version: 5.6
>>>Operating System: SUN and LINUX
>>>Hardware Information: SUN
>>>Inquiry: HI, 
>>>   
>>>    I was wondering if there was a way to plot vorticity with sncross or ano
> th
>>> er one of the sn* programs? I tried snparm = avor(obs) to no avail. Thanks 
> fo
>>> r your time.
>>>
>>>Jay
>>>
>>>
>>>
>>
>>Jay,
>>avor() is a GPARM grid function, and not valid for use as a SNPARM.
>>
>>Vorticity requires a calculation of dv/dx - du/dy which is easily done
>>in gridded data, if you run OABSND on an uppar air data file to
>>produce a gridded data set.
>>
>>Steve Chiswell
>>**************************************************************************** 
>>Unidata User Support                                    UCAR Unidata Program 
>>(303)497-8643                                                  P.O. Box 3000 
>>address@hidden                                   Boulder, CO 80307 
>>---------------------------------------------------------------------------- 
>>Unidata WWW Service              http://my.unidata.ucar.edu/content/support  
>>**************************************************************************** 
>
>******************************************************
>Jason Shafer
>Graduate Student
>University of Utah-Dept of Meteorology
>135 S 1460 E WBB Rm. 819
>Salt Lake City, UT 84112-0110
>
>Phone: 801-585-1412       Fax: 801-581-4362
>address@hidden
>http://www.met.utah.edu/jimsteen/jshafer/
>******************************************************
>
>