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[IDV #ZEO-881615]: Screen Capture and Other Issues

> Yuan,
> 
> And Equivalent Potential Temperature(Theta-E)?
> 
> Thanks!

This one is tricky, I can see the procedure of calculation is:


AdiabaticEquivalentTemperature is calculated from the temp and mixingratio

and 

PotentialTemperature is calculated from the pressure and 
AdiabaticEquivalentTemperaturet 
 

and 

EquivalentPotentialTemperature is PotentialTemperature.


Yuan
> 
> Stefan
> --
> Stefan Cecelski
> Ph.D. Candidate and Graduate Research Assistant
> AOSC Department: University of Maryland College Park
> 2343 Computer and Space Sciences Building(CSS #224)
> 703.801.1370
> address@hidden
> 
> On Tue, May 17, 2011 2:53 pm, Unidata IDV Support wrote:
> >> Julien,
> >>
> >> That is ok. Here are two I keep getting questions about:
> >>
> >> Horizontal Flux Divergence
> >
> > horizontal scalar flux divergence defined as u*(dp/dx) + v*(dp/dy) +
> > p*(du/dx + dv/dy)
> >> Potential Temperature
> >
> >   theta = t * (1000/p)** .286
> >
> > The url of the user guide may have some information you are looking for:
> >
> > http://www.unidata.ucar.edu/software/idv/docs/userguide/tools/JythonLib.html
> >
> >
> > Yuan
> >>
> >> Thanks!
> >>
> >> Stefan
> >> --
> >> Stefan Cecelski
> >> Ph.D. Candidate and Graduate Research Assistant
> >> AOSC Department: University of Maryland College Park
> >> 2343 Computer and Space Sciences Building(CSS #224)
> >> 703.801.1370
> >> address@hidden
> >>
> >> On Fri, May 13, 2011 1:58 pm, Unidata IDV Support wrote:
> >> >> Julien,
> >> >>
> >> >> Before we open another can of worms, I would like to make one
> >> request. I
> >> >> have convinced my research group at UMD to use IDV(~5 students). For
> >> our
> >> >> research, we NEED to know the formulas we use to calculate variables
> >> >> such
> >> >> as Theta-e, Horizontal Flux Divergence and so forth. There are
> >> copious
> >> >> ways of calculating these variables, and literature proves that some
> >> >> ways
> >> >> are more accurate than others. I would like to request that a PDF
> >> >> document, or some literature is created that lists how the derived
> >> >> variables in the IDV are calculated. I understand in the formula
> >> editor
> >> >> we
> >> >> can see which variables are going into it, but we need documentation
> >> on
> >> >> the actual formulas used. For example, there are at least 3 different
> >> >> ways
> >> >> to calculate Theta-e(Equivalent Potential Temp). It has been shown
> >> that
> >> >> the method by Bolton(~1980) is the best. Documentation of which
> >> formulas
> >> >> are used are essential for research as in peer-reviewed papers, you
> >> must
> >> >> know the formulas, and will be asked about them for the very reasons
> >> >> mentioned above. Thanks in advance.
> >> >>
> >> >> V/R,
> >> >>
> >> >> Stefan
> >> >> --
> >> >
> >> >
> >> > Stefan,
> >> >
> >> >       I believe there is no document available for these formulas.
> >> Most
> >> > formulas in the IDV were created by Don in Jython or Java, and I
> >> > believed he referenced those formulas in the GEMPAK. With limit
> >> > resources here, it is unlikely to spend more time to create the
> >> > document for these formulas. However, I can provide more details
> >> > information for specific formula if the request is raised.  Sorry
> >> > about the inconvenience.
> >> >
> >> >
> >> > Yuan
> >> >
> >> > Ticket Details
> >> > ===================
> >> > Ticket ID: ZEO-881615
> >> > Department: Support IDV
> >> > Priority: Normal
> >> > Status: Open
> >> >
> >> >
> >>
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: ZEO-881615
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 
> 


Ticket Details
===================
Ticket ID: ZEO-881615
Department: Support IDV
Priority: Normal
Status: Open