/usr/share/ncarg/nclex/gsun/gsun09n.ncl is in libncarg-data 6.3.0-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
function addcyclic(data[*][*]:float)
;
; Add a cyclic point in "x" to a 2D array
; for a lat/lon plot "x" corresponds to "lon"
; "ny" corresponds to "nlat"
; "mx" corresponds to "mlon"
local dims, newdata, ny, mx, mx1
begin
dims = dimsizes(data)
ny = dims(0)
mx = dims(1)
mx1 = mx+1
newdata = new((/ny ,mx1/),float)
newdata(:,0:mx-1) = data ; pass everything
newdata(:,mx) = (/ data(:,0) /) ; value only
if((.not.ismissing(newdata!1)) .and. iscoord(data,newdata!1)) then
newdata&$newdata!1$(mx) = newdata&$newdata!1$(0) + 360.0
end if
return(newdata)
end
begin
file1 = ncargpath("data") + "/cdf/fice.nc"
ice1 = addfile(file1,"r")
fice = ice1->fice ; Read fice -- ice concentration
hlat = ice1->hlat
hlon = ice1->hlon
dimf = dimsizes(fice) ; Define an array to hold long-term monthly means.
ntime = dimf(0)
nhlat = dimf(1)
nhlon = dimf(2)
icemon = new ( (/nhlat,nhlon/) , float, -999.0)
icemon!0 = "hlat" ; Name dimensions 0 and 1
icemon!1 = "hlon" ; of icemon and create
icemon&hlat = hlat ; coordinate variables for both.
icemon&hlon = hlon
; Calculate the January (nmo=0) average.
nmo = 0
month = nmo+1
icemon = dim_avg(fice(hlat | :, hlon | :, time | nmo:ntime-1:12))
icemon = mask(icemon, icemon.eq.0., False) ; Set 0.0 to _FillValue.
nsub = 16 ; Subscript location of northernmost hlat to be plotted.
wks = gsn_open_wks("ncgm","gsun09n") ; Open an NCGM.
cmap = (/(/1.00,1.00,1.00/), (/0.00,0.00,0.00/), (/1.00,1.00,0.50/), \
(/0.00,0.00,0.50/), (/0.50,1.00,1.00/), (/0.50,0.00,0.00/), \
(/1.00,0.00,1.00/), (/0.00,1.00,1.00/), (/1.00,1.00,0.00/), \
(/0.00,0.00,1.00/), (/0.00,1.00,0.00/), (/1.00,0.00,0.00/), \
(/0.50,0.00,1.00/), (/1.00,0.50,0.00/), (/0.00,0.50,1.00/), \
(/0.50,1.00,0.00/), (/0.50,0.00,0.50/), (/0.50,1.00,0.50/), \
(/1.00,0.50,1.00/), (/0.00,0.50,0.00/), (/0.50,0.50,1.00/), \
(/1.00,0.00,0.50/), (/0.50,0.50,0.00/), (/0.00,0.50,0.50/), \
(/1.00,0.50,0.50/), (/0.00,1.00,0.50/), (/0.50,0.50,0.50/), \
(/0.625,0.625,0.625/)/)
gsn_define_colormap(wks,cmap) ; Define a color map.
resources = True
icemonnew = addcyclic(icemon(0:nsub,:))
resources@sfXArray = icemonnew&hlon ; Necessary for overlay on a map.
resources@sfYArray = icemonnew&hlat
resources@tiMainString = "CSM Y00-99 Mean Ice Fraction Month =" + month
map = gsn_contour_map(wks,icemonnew,resources) ; Draw a contour
; over a map.
nmos = 12
do nmo = 1,nmos-1
month = nmo+1
icemon = dim_avg(fice(hlat | :, hlon | :, time | nmo:ntime-1:12))
icemon = mask(icemon, icemon.eq.0., False) ; set 0.0 to _FillValue
setvalues map@contour ; Change the title for the contour plot.
"tiMainString" : "CSM Y00-99 Mean Ice Fraction Month =" + month
end setvalues
setvalues map@data ; Change the data for the contour plot.
"sfDataArray" : addcyclic(icemon(0:nsub,:))
end setvalues
draw(map) ; Draw the contour plot.
frame(wks) ; Advance the frame.
end do
delete(icemon) ; Clean up.
delete(icemonnew)
delete(map)
end
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