Southern hemisphere wind barbs on Skew T plot [SEC=UNCLASSIFIED]

From: Justin Peter <J.Peter_at_nyahnyahspammersnyahnyah>
Date: Wed Nov 28 2012 - 20:05:31 MST

Dear ncl-talk members,

I am having trouble producing the pennants on the wind barbs with the correct orientation for the southern hemisphere.

Here is the relevant part of my code:

; --- Create background skew-T and plot sounding----------------

  vcres = True ; plot mods desired
  vcres@vcGlyphStyle<mailto:vcres@vcGlyphStyle> = "WindBarb"
  vcres@vcWindBarbTickAngleF<mailto:vcres@vcWindBarbTickAngleF> = -62. ;Southern Hemisphere wind barbs

  skewtOpts = True
  ;skewtOpts@DrawColAreaFill = True ; default is False
  skewtOpts@DrawColAreaFill<mailto:skewtOpts@DrawColAreaFill> = False ; default is False
  ;skewtOpts@tiMainString = "Cluster Average Soundings"
  skewtOpts@tiMainString<mailto:skewtOpts@tiMainString> = ""
  skewtOpts@DrawFahrenheit<mailto:skewtOpts@DrawFahrenheit> = False
  skewtOpts@PrintZ<mailto:skewtOpts@PrintZ> = True

  skewtOpts@vcGlyphStyle<mailto:skewtOpts@vcGlyphStyle> = "WindBarb"
  skewtOpts@vcWindBarbTickAngleF<mailto:skewtOpts@vcWindBarbTickAngleF> = -62.

  skewt_bkgd = skewT_BackGround (wks, skewtOpts)
  draw (skewt_bkgd)

  dataOpts = True ; options describing data and ploting
  dataOpts@DrawFahrenheit<mailto:dataOpts@DrawFahrenheit> = False ; default is True
  dataOpts@PrintZ<mailto:dataOpts@PrintZ> = True ; do not print Z
  dataOpts@ThermoInfo<mailto:dataOpts@ThermoInfo> = False ; print thermodynamic info

  dataOpts@vcGlyphStyle<mailto:dataOpts@vcGlyphStyle> = "CurlyVector"
  dataOpts@vcWindBarbTickAngleF<mailto:dataOpts@vcWindBarbTickAngleF> = -62.

As you can see, I have tried setting the vcWindBarbTickAngleF = -62.0 which is correct for the southern hemisphere. No matter which variable I associate this attribute with, nothing happens. The wind barbs stay in the northern hemisphere orientation.

Can anyone help me? I have only used ncl to produce skew t plots, so I may have missed something obvious.

Cheers,
Justin

Dr Justin Peter | Research Scientist
Radar applications / Remote Sensing
[cid:489342302@29112012-12A0]
Bureau of Meteorology
GPO Box 1289 Melbourne VIC 3001
Level 6, 700 Collins Street, Docklands VIC 3008
Tel: +61 3 9669 4838 | j.peter@bom.gov.au<mailto:j.peter@bom.gov.au>
www.bom.gov.au<http://www.bom.gov.au/>

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Received on Wed Nov 28 20:05:44 2012

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