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20040212: GEMPAK Calculation: THTV

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  • Subject: 20040212: GEMPAK Calculation: THTV
  • Date: Thu, 12 Feb 2004 17:46:07 -0700
Patrick,

THTV will be automatically calculated in the grid programs
as well,  as an example, for 500 mb thtv:
 GDATTIM  = f000
 GLEVEL   = 500
 GVCORD   = pres
 GFUNC    = thtv
 GDFILE   = eta212

You must have both temperature and moisture on the level.

Steve Chiswell


>From: "Patrick O'Reilly" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200402122258.i1CMwxp1022062

>Hi there gurus,
>
>I searched high and low, googled until I dropped, even looked in my
>handy-dandy GEMPAK User's Guide, but I couldn't find what I was looking for.
>I was wondering how GEMPAK calculates THTV (virtual potential temperature),
>a snparm automatically calculated in snprof.  I'm trying to tease thtv
>profiles out of model data, but I think my equation for thtv I'm putting in
>gfunc may be screwy.  It's giving me output, but values aren't what I would
>expect. Thanks for sharing your knowledge.
>
>Patrick
>_________________________________________
>Patrick O'Reilly
>Meteorological Decision Support Scientist
>The STORM Project at UNI
>address@hidden    319-273-3789
>http://www.uni.edu/storm
>
>"No trees were killed in the making of this e-mail...however,
> a large number of electrons were horribly inconvenienced."
>
--