res                       = True            ; plot mods desired
  res@NoHeaderFooter           = True            ; Switch headers and footers off
  res@cnLinesOn             = False
  res@gsnDraw               = False 
  res@gsnFrame              = False 
  res@gsnMaximize           = True            ; uncomment to maximize size
  res@lbLabelAutoStride     = True            ; let NCL determine label spacing
  res@lbTitleFontThicknessF = 10.0
  res@lbTitleFontHeightF = 0.03
  res@lbLabelFontHeightF = 0.03
  res@lbLabelBarOn = False ;Turns off the individual label bars
  res@cnFillOn              = True            ; turn on color
  res@cnLinesOn             = False           ; turn off contour lines
  res@cnLineLabelsOn        = False    ; 可以去掉小数字
  res@cnInfoLabelOn         = False    ; turn off cn info label
  res@cnLevelSelectionMode = "ExplicitLevels" ; set explicit contour levels
; PDF
  res@tmXTOn          = False
  res@tmYROn          = False
  ;res@gsnXYBarChart         = True                 ; turn on bar chart
  ;res@pmLegendDisplayMode    = "Always"  
  res@pmLegendSide           = "Top"               ; Change location of 
  res@pmLegendParallelPosF   = 0.8                ; move units right
  res@pmLegendOrthogonalPosF = -0.4                ; move units down
  res@pmLegendWidthF         = 0.125               ; Change width and
  res@pmLegendHeightF        = 0.125                ; height of legend.
  res@lgPerimOn              = False                ; turn off/on box around
  res@lgLabelFontHeightF     = .015                ; label font height
  res@xyMonoDashPattern        = True              ; all solid 
  res@xyLineThicknesses        = (/2.0,2.0/)
  res@xyLineColors             = (/"red","blue"/)


;************
; map
;************
  mpres = True
  mpres@mpDataSetName="Earth..4"
  mpres@mpDataBaseVersion = "Ncarg4_1"
  ;mpres@mpOutlineBoundarySets = "AllBoundaries"
  mpres@mpOutlineSpecifiers = (/"China","Taiwan"/)
  mpres@mpGridAndLimbOn=False  
  
  mpres@mpNationalLineThicknessF=2. ; national boundary outlines
  mpres@mpNationalLineColor = "grey"
  
  mpres@mpGeophysicalLineColor = "grey"  
  mpres@mpGeophysicalLineThicknessF = 2 ; set geophysical boundary outlines e.g. coastline
  
  ;mpres@mpUSStateLineColor = "grey60"
  ;mpres@mpUSStateLineThicknessF = 1.8 ; set provincal boundary outlines
  mpres@tmYLLabelFontHeightF=0.02 ; x and y axis font size
  mpres@tmXBLabelFontHeightF=0.02