Southern Hemisphere wind barbs in panel plots

From: Kyle Griffin <ksgriffin2_at_nyahnyahspammersnyahnyah>
Date: Mon Jul 08 2013 - 17:27:20 MDT

Hi all,

Although NCL does automatically account for Southern Hemisphere wind barbs
in single-map applications, I believe I've found a bug in trying to use
this feature in panel applications. My experiments suggest that the
automatic flipping of the wind barbs only occurs on the first panel of the
plot, leaving the other panels with NH wind barbs (see attached). The first
thought for a workaround is to manually set vcWindBarbTickAngleF = -62.0,
but this results in flipping the direction for *all* panels, making the
first panel plot NH-oriented barbs. I've included the resource settings and
plotting commands I've used for completeness, since my script is likely too
complicated/messy to include here and probably not necessary for diagnosing
this problem. Thanks!


; All vector resources, even those that shouldn't be relevant here
  vres@vcGlyphStyle = "WindBarb"
  vres@vcRefLengthF = 0.022
  vres@vcRefMagnitudeF = 10.0
  vres@vcRefAnnoOn = False
  vres@vcMinDistanceF = 0.022
  vres@vcWindBarbLineThicknessF = 3.0
  ;vres@vcWindBarbTickAngleF = -62.0

 ;............. plot data below, looping over i until numPanels-1

  mpid(i) = gsn_csm_map(wks,mpres)
  pwflid = gsn_csm_contour(wks,theta({curdate},:,:),pwres)
  cnid = gsn_csm_contour(wks,vort({curdate},:,:),cres)
  vcid = gsn_csm_vector(wks,u_pv(i,:,:),v_pv(i,:,:),vres)


 ;.....set some generic panelRes options here, then....


Kyle S. Griffin
Department of Atmospheric and Oceanic Sciences
University of Wisconsin - Madison
Room 1421
1225 W Dayton St, Madison, WI 53706

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Received on Mon Jul 8 17:27:55 2013

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