Re: Isent Stuff

Mike,

I tracked down your problem to the routine dggtmp.c which was translated
from the previous Fortran routine dggtmp.f (Version 5.9.3 and earlier).
The translation changed a routine call which eliminated the ability to
check for the way to calculate temperature from the pressure grid on the
isentropic coordinate.

If you want to rebuild your routine (you had mentioned you built on one
platform),
I can send you the update. Otherwise, it will be included in my 5.10.1
release coming up in the next week or so.

Steve Chiswell
Unidata User Support


On Tue, 2007-02-06 at 06:49 -0600, Mike Bender wrote:
> Steve,
> 
> No joy using RELH(tmpc,dwpc).  Gdvint indicates it is using RELH from 
> the PRES grids to compute the THTA surfaces.  A gdinfo shows SPFH (which 
> I think is specific humidity) is output to THTA interpolation (which has 
> always been in the past looking at older saved model data).  I am 
> getting by by using an older version of gdplot and renaming it to 
> gdplot_isent just to get the RH to output.  I have not had to mess with 
> GDVINT in over 15 years (Ron Miller showed me how to use it for isent 
> computations), so this is the first time I have ever really had 
> problems, lucky me I guess.  I will keep digging into this as time 
> allows, but for now, my work around works!
> 
> Mike
> 
> 
> 
> Steve Chiswell wrote:
> > Mike,
> > 
> > Have you tried using the RELH(tmpc,dwpc) function? What grids are
> > available on your 292K THTA coordinate? 
> > 
> > Steve Chiswell
> > Unidata User Support
> > 
> > 
> > On Mon, 2007-02-05 at 07:17 -0600, Mike Bender wrote:
> >> Steve,
> >>
> >> I have noticed with gempak594 that there is a problem using relh in thta 
> >> coords.  I have been gdplot_nc in the past to generate say the 292K 
> >> surface of pressure, wind, and relh.  However now it says it can't find 
> >> "RELH" on the requested grids.  Gdvint worked fine on the NAM and I 
> >> doubled checked it this morning.  This error is occurring on RHEL4 EMT64 
> >> machines and FEDORA CORE 6 32 bit machines.
> >>
> >> I went back and used the previous version of GEMPAK's gdplot program on 
> >> last nights NAM run, and I got RELH to output just fine.
> >>
> >> Oh, one other note, the RHEL4 EMT64 machines had GEMPAK594 compiled into 
> >> them, while the FC6 machines had the pre-compiled binaries loaded in. 
> >> What is very strange is, you can output MIXR! but no RELH.
> >>
> >> Thanks
> >> Mike Bender
> >> Senior Meteorologist/ITO
> >> MMAC, Oklahoma City, OK
> >>
-- 
Steve Chiswell <address@hidden>
Unidata