ncl画温度剖面图等值线与数值不对应

wow哈哈

res=True
  res@gsnFrame=False
  res@gsnDraw=False
  res@cnLineLabelsOn=True
  res@cnFillOn=False
  res@cnInfoLabelOn=False
  res@cnLevelSelectionMode="ExplicitLevels"
  res@cnLinesOn=True
  res@gsnAddCyclic=False
  res@tfDoNDCOverlay= True
  res@trYReverse=True
  res@lbLabelBarOn=True
  res@tmYROn=False
  res@tmXTOn=False
  res@tmXBOn=True
  res@tmXBLabelsOn=True
  res@tmXBMode="Explicit"
  res@tmXBValues=(/20,25,30,35,40,45,50,55/)
  res@tmXBLabels=(/"20N","25N","30N","35N","40N","45N","50N","55N"/)
  res@tmYLOn=True
  res@tmYLLabelsOn=True
   res@cnLineThicknessF=1.0
  res@cnSmoothingOn = True
   res@cnSmoothingDistanceF = 0.01
  res@cnSmoothingTensionF = 1

T=a->TMP_P0_L100_GLL0(10:30,:,:)
T=T-273.15
lat=fspan(90,-90,181)
lon=fspan(0,359,360)
lat@units="degrees_north"
lon@units="degrees_east"
l=a->lv_ISBL0(10:30)
l@units="pa"
T!0="l"
T&l=l
T!1="lat"
T&lat=lat
T!2="lon"
T&lon=lon
res@cnLineColor = "red"
res@cnLineLabelPlacementMode = "Constant"
res@cnLineLabelFontColor = "Black"
res@cnLevels=(/-60,-55,-50,-45,-40,-35,-30,-25,-20,-15,-10,-5,0,5,10,15,20,25,30/)
;res@cnLineThicknessF=
plot=gsn_csm_pres_hgt(wks,T(:,70:35,120),res)
print(T(8,45,120))