; ***********************************************

; xy_4.ncl

; ***********************************************

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

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"

;************************************************

begin

;************************************************

; read in data: observed

;************************************************

 diri  = "/fis/cgd/cseg/people/jeff/clamp_data/co2/"

 fili  = "co2_globalView_98.nc"

 g     = addfile (diri+fili,"r")

 val   = g->CO2_SEAS  

 lon   = g->LON 

 lat   = g->LAT

 sta   = chartostring(g->STATION) 

 delete (g)

;print (sta(0))

 ncase = dimsizes(lat)

;print (ncase)

;**************************************************************

; get only the lowest level at each station 

;**************************************************************

 lat_tmp = lat

 lat_tmp@_FillValue = 1.e+36

 do n = 0,ncase-1

    if (.not. ismissing(lat_tmp(n))) then 

       indexes = ind(lat(n) .eq. lat .and. lon(n) .eq. lon)

       if (dimsizes(indexes) .gt. 1) then

          lat_tmp(indexes(1:)) = lat_tmp@_FillValue

       end if

       delete (indexes)

    end if

 end do

 indexes = ind(.not. ismissing(lat_tmp))

;print (dimsizes(indexes))

;print (indexes)

 lat_ob = lat(indexes)

 lon_ob = lon(indexes)

 val_ob = val(indexes,:)

;printVarSummary (val_ob)

;print (lat_ob +"/"+lon_ob)

;************************************************

; read in model data

;************************************************

  diri2 = "/fis/cgd/cseg/people/jeff/clamp_data/model/"

  fili2 = "b30.061m_401_425_MONS_climo.nc"

  g     = addfile(diri2+fili2,"r")

  x     = g->CO2

  xi    = g->lon

  yi    = g->lat

  xdim  = dimsizes(x)

  nlev  = xdim(1)

  y     = x(:,0,:,:)

; printVarSummary (y)

; get the co2 at the lowest level

  y     = x(:,nlev-1,:,:)

; change to unit of observed (u mol/mol)

; Model_units [=] kgCO2 / kgDryAir

; 28.966 = molecular weight of dry air

; 44.       = molecular weight of CO2

; u mol = 1e-6 mol

  factor = (28.966/44.) * 1e6

  y      = y * factor

  y@_FillValue = 1.e36

  y@units      = "u mol/mol"

; y = where(y0 .lt. 287.,y@_FillValue,y)

; printVarSummary (y)

; print (min(y)+"/"+max(y))

; interpolate into observed station

; note: model is 0-360E, 90S-90N

; to be able to handle observation at (-89.98,-24.80)

  print (yi(0))

  yi(0) = -90.

  i = ind(lon_ob .lt. 0.)

  lon_ob(i) = lon_ob(i) + 360.  

  yo = linint2_points_Wrap(xi,yi,y,True,lon_ob,lat_ob,0)

  val_model = yo(pts|:,time|:)

; printVarSummary (val_model)

; print (min(val_model)+"/"+max(val_model))

; remove annual mean

  val_model = val_model - conform(val_model,dim_avg(val_model),0)

; print (min(val_model)+"/"+max(val_model))

  plot_sta      = new((/2,12/),float)

  plot_sta@long_name = "Seasonal CO2"

  mon = ispan(1,12,1)

  mon@long_name = "month"

  plot_type = "ps"

  plot_type_new = "png"

  res                   = True                      ; plot mods desired

  res@xyLineThicknesses = (/1.0,2.0/)               ; make 2nd lines thicker

  res@xyLineColors      = (/"blue","red"/)          ; change line color

;------------------------------------------------------------------

; Add a boxed legend using the more simple method, which won't have

; vertical lines going through the markers.

  res@pmLegendDisplayMode    = "Always"

; res@pmLegendWidthF         = 0.1

  res@pmLegendWidthF         = 0.08

  res@pmLegendHeightF        = 0.05

; res@pmLegendOrthogonalPosF = -1.17

; res@pmLegendOrthogonalPosF = -1.00  ;(downward)

  res@pmLegendOrthogonalPosF = -0.30  ;(downward)

; res@pmLegendParallelPosF   =  0.18

  res@pmLegendParallelPosF   =  0.23  ;(rightward)

; res@lgPerimOn             = False

  res@lgLabelFontHeightF     = 0.015

  res@xyExplicitLegendLabels = (/"observed","model_b30.061m"/)

;-------------------------------------------------------------------

  nzone = 4

  do z = 0,nzone-1

  if (z .eq. 0) then 

;    maximum score for the zone, 60N-90N 

     score_max = 5.0

;    index of stations in this zone

     ind_z = ind(lat_ob .ge. 60.)

;    print (ind_z)

;    print (lat_ob(ind_z)+"/"+lon_ob(ind_z))

;    print (val_ob(ind_z,:))

;    print (val_model(ind_z,:))

  end if

  if (z .eq. 1) then 

;    maximum score for the zone, 30N-60N 

     score_max = 5.0

;    index of stations in this zone

     ind_z = ind(lat_ob .ge. 30. .and. lat_ob .lt. 60.)

;    print (ind_z)

;    print (lat_ob(ind_z)+"/"+lon_ob(ind_z))

;    print (val_ob(ind_z,:))

;    print (val_model(ind_z,:))

  end if

  if (z .eq. 2) then 

;    maximum score for the zone, EQ-30N 

     score_max = 5.0

;    index of stations in this zone

     ind_z = ind(lat_ob .ge. 0. .and. lat_ob .lt. 30.)

;    print (ind_z)

;    print (lat_ob(ind_z)+"/"+lon_ob(ind_z))

;    print (val_ob(ind_z,:))

;    print (val_model(ind_z,:))

  end if

  if (z .eq. 3) then 

;    maximum score for the zone, 90S-EQ 

     score_max = 5.0

;    index of stations in this zone

     ind_z = ind(lat_ob .lt. 0. )

;    print (ind_z)

;    print (lat_ob(ind_z)+"/"+lon_ob(ind_z))

;    print (val_ob(ind_z,:))

;    print (val_model(ind_z,:))

  end if

 npts = dimsizes(ind_z)

 print (npts)

 do n=0,npts-1

    plot_sta(0,:) = (/val_ob(ind_z(n),:)/)

    plot_sta(1,:) = (/val_model(ind_z(n),:)/)

    title = sta(ind_z(n))+"("+lat(ind_z(n))+","+lon(ind_z(n))+")"

    plot_name = sta(ind_z(n))

;   print (title)

;   print (plot_name)

    wks = gsn_open_wks (plot_type,plot_name)          ; open workstation

    res@tiMainString      = title                     ; add title

    plot  = gsn_csm_xy (wks,mon,plot_sta,res)         ; create plot

    frame(wks)

    system("convert "+plot_name+"."+plot_type+" "+plot_name+"."+plot_type_new)

    system("rm "+plot_name+"."+plot_type)

    system("rm "+plot_name+"-1."+plot_type_new)

    system("mv "+plot_name+"-0."+plot_type_new+" "+plot_name+"."+plot_type_new)

    clear (wks)

 end do

 delete (ind_z)

 end do

end