DKRZ NCL contour curvilinear example

DKRZ NCL example script:

;-----------------------------------------------------------------
;  DKRZ NCL Example:  NCL_bipolar_grid_MPI-ESM.ncl
;
;  30.10.14 kmf
;-----------------------------------------------------------------
begin
;-- define filen name

   diri = "./"
   fili = "tos_ocean_bipolar_grid.nc"

;-- open file and read variable
   f           =  addfile(diri+fili, "r")
   tos         =  f->tos
   tos@lat2d   =  f->lat
   tos@lon2d   =  f->lon
   var         =  tos(0,:,:)

;-- define the workstation (plot type and name)
   wks = gsn_open_wks("png","plot_curvilinear_MPI-ESM")

;-- set resources
   res                       =  True
   res@gsnMaximize           =  True            ;-- maximize graphics output
   res@gsnAddCyclic          =  True            ;-- add cyclic point

   res@mpMinLonF             =  -40.0
   res@mpMaxLonF             =   40.0
   res@mpMinLatF             =   20.0
   res@mpMaxLatF             =   90.0

   res@cnFillOn              =  True            ;-- turn on contour fill
   res@cnFillMode            = "CellFill"       ;-- use CellFill method
   res@cnLinesOn             =  False           ;-- Turn lines off
   res@cnLineLabelsOn        =  False           ;-- Turn labels off
   res@cnCellFillEdgeColor   = 1                ;-- black edge lines

   res@tiMainString          = "DKRZ NCL Example: curvilinear grid (MPI-ESM)" ;-- title string
   res@tiMainFontHeightF     =  0.02            ;-- title font size

;-- draw the contour map
   plot = gsn_csm_contour_map(wks,var,res)

end

Result: