[ncl-talk] Unexpected line (Upper portion) in the plots produced using NCL 6.3.0

[Jacob Alberto Garcia]

Hello,

I am currently using NCL 6.3.0 to plot data from WRF output. Attached is
the script I used and an example of what comes out afterwards.

I can't seem to figure out as to why there is always a line included in the
upper portion of my plots. Hoping you guys could help me out

Here's my script:

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"
;load "./WRFUserARW.ncl"

begin
  a = addfile("./YSU_EA_d03.nc","r")
  type = "pdf"
  wks = gsn_open_wks(type,"PBLH_YSU")
  gsn_define_colormap(wks,"WhBlGrYeRe")

; Plot options
  pltres = True
  mpres = True
  res = True
  res at gsnMaximize = True
  mpres at mpDataBaseVersion = "HighRes"
  res at MainTitle                   = "PBLH"
  NoTitles = True
  LatLonOverlay = True
  res at tiMainFontHeightF   = 0.04
  res at lbLabelFontHeightF = 0.03
  res at tiXAxisFontHeightF = 0.03
  res at tiYAxisFontHeightF = 0.03
  res at cnFillOn = True
  res at gsnSpreadColors = True
  res at cnLinesOn = False
  res at cnLineLabelsOn = False
  res at cnLevelSelectionMode = "ManualLevels"
  res at cnMinLevelValF = 0.
  res at cnMaxLevelValF = 2800
  mpres at mpGeophysicalLineColor = "Black"

  times = wrf_user_getvar(a,"times",-1)
  ntimes = dimsizes(times)

   do it = 0,ntimes-1

    print("Working on time: " + times(it) )
    res at TimeLabel = times(it)

     PBLH = wrf_user_getvar(a,"PBLH",it)
     contour_PBLH = wrf_contour(a,wks,PBLH,res)
      plot = wrf_map_overlays(a,wks,(/contour_PBLH/),pltres,mpres)
     end do
end


Cheers

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