# Re: skewT_func.ncl

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Mon Apr 08 2013 - 15:13:50 MDT

Hi Ketsiri

This is not easy. This was hardwired to match a particular
SkewT diagram: USAF Skew-t, log p diagram (form dod-wpc 9-16-1)

Some things are easy ...

216 ;; ; xmin = skewtx (-33.6, skewty(1050.)) [t=deg C]
217 ;;xmin =-19.0 ; xmin = skewtx (-109.1,skewty(100.)) [t=deg C]
218 xmin =-30.55 ; xmin = skewtx (-50.0 ,skewty(1050.)) [t=deg C]
^^^^^^^^^^^^^^^^^^^^^^

However, many other features are more difficult. Without a template,
certain aspects of the U.S. skewT are lost. For example

140 ; --- declare isotherm [C] values and pressures [hPa] where isotherms
141 ; --- intersect the edge of the skew-t diagram.
142
143 temp = (/-100.,-90.,-80.,-70.,-60.,-50.,-40.,-30. \
144 , -20.,-10., 0., 10., 20., 30., 40., 50. /)
145 lendt= (/ 132., 181., 247., 337., 459., 625., 855. \
146 ,1050.,1050.,1050.,1050.,1050.,1050.,1050.,1050.,1050./)
147 rendt= (/ 100., 100., 100., 100., 100., 100., 100. \
148 , 135., 185., 251., 342., 430., 500., 580., 730., 993./)

These are hardwired based on seeing th actual Air Force skewT diagram.

It would take a *lot of work* to modify and test all the changes.

On 4/5/13 4:32 PM, Ketsiri wrote:
> Hello Dennis Shea,
> I am using the skewT_func.ncl to make Skew-T plot.
> The problem that I found is the temperature in my domain (Fairbanks, AK)
> is below 40 degree.
> So I would like to ask for your help to edit the skewT_func.ncl to make
> it able to show the minimum temperature to -50 C.
>
> Sincerely,
> Ketsiri
>
>
>
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Received on Mon Apr 8 15:14:22 2013

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