[ncl-talk] Geopotential Height Contours Overlay Zoomed In Terrain Issue
Mary Haley
haley at ucar.edu
Thu May 5 09:59:48 MDT 2016
Thanks for the cleaner script.
Your problem is with this line:
z_plane at lon2d = hgt at lat2d
You are assigning the "lat2d" attribute to a "lon2d" attribute. It should
be:
z_plane at lon2d = hgt at lon2d
--Mary
On Wed, May 4, 2016 at 11:01 PM, Kerwyn Texeira <ktish86 at gmail.com> wrote:
> Hi ncl-talk,
>
> I'm still having the issue of not being able to plot geopotential height
> at 600hpa with winds overlaying zoomed in terrain. I am able to plot winds
> overlay zoomed in terrain but not winds and geopotential height contours
> overlaying zoomed in terrain at 600hpa. I have cleaned up my script as
> best as I can and re ran and still no results. I have attached a plot of
> what I'm getting. Does anyone have an idea what is missing from my
> script? Your help will be greatly appreciated.
>
> Thanks,
> Kerwyn
>
> Script:
>
> 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/wrf/WRFUserARW.ncl"
>
> begin
> a = addfile("./wrfout_d03_2014-01-11_22:40:00.nc","r")
>
> it = 0
> hgt = wrf_user_getvar(a, "HGT", it)
> hgt at lat2d = wrf_user_getvar(a, "XLAT", it)
> hgt at lon2d = wrf_user_getvar(a, "XLONG", it)
> u = wrf_user_getvar(a, "ua", it)
> v = wrf_user_getvar(a, "va", it)
> p = wrf_user_getvar(a, "pressure", it)
> qc = wrf_user_getvar(a, "QCLOUD", it)
> qr = wrf_user_getvar(a, "QRAIN", it)
> qs = wrf_user_getvar(a, "QSNOW", it)
> qi = wrf_user_getvar(a, "QICE", it)
> pre = wrf_user_getvar(a, "RAINNC", it)
> z = wrf_user_getvar(a, "z", it)
>
> u_wind = wrf_user_intrp3d(u, p, "h", 600., 0.0, False)
> v_wind = wrf_user_intrp3d(v, p, "h", 600., 0.0, False)
> qcl = wrf_user_intrp3d(qc, p, "h", 600., 0.0, False)
> qrn = wrf_user_intrp3d(qr, p, "h", 600., 0.0, False)
> qsn = wrf_user_intrp3d(qs, p, "h", 600., 0.0, False)
> qice = wrf_user_intrp3d(qi, p, "h", 600., 0.0, False)
> z_plane = wrf_user_intrp3d(z, p, "h", 600., 0.0, False)
>
> qcl = qcl*1000
> qrn = qrn*1000
> qsn = qsn*1000
> qice = qice*1000
> precip = pre*0.03937
> froz = qice + qsn
> melt = qcl + qrn
>
> froz at lon2d = hgt at lon2d
> froz at lat2d = hgt at lat2d
>
> melt at lon2d = hgt at lon2d
> melt at lat2d = hgt at lat2d
>
> z_plane at lon2d = hgt at lat2d
> z_plane at lat2d = hgt at lat2d
>
> spd = (u_wind*u_wind + v_wind*v_wind)^(0.5) ;m/s
> u_wind = u_wind*1.94384449
> v_wind = v_wind*1.94384449
>
> u_wind at lon2d = hgt at lon2d
> u_wind at lat2d = hgt at lat2d
>
> v_wind at lon2d = hgt at lon2d
> v_wind at lat2d = hgt at lat2d
>
> ; spd = spd*1.94384449
> ; spd at units = "Wind Speed"
> ; spd at units = "kts"
>
> wks_type = "png"
> wks_type at wkWidth = 2500
> wks_type at wkHeight = 2500
> wks = gsn_open_wks(wks_type,"geo") ; send graphics to PNG file
>
>
> gsn_define_colormap(wks,"matlab_jet")
>
> res = True
> res at gsnDraw = False ; do not draw the plot
> res at gsnFrame = False ; do not advance the frame
> res at cnLineLabelsOn = False ; do not use line labels
> res at cnFillOn = True ; color fill
> res at cnLinesOn = False ; do not draw contour lines
> res at tiMainString = ""
> res at pmTickMarkDisplayMode = "Always"
> res at mpProjection = "CylindricalEquidistant" ;The default
> res at mpDataBaseVersion = "MediumRes"
> res at mpOutlineOn =True
> res at lbOrientation = "Vertical"
> res at tiMainOffsetYF = -0.03
> res at mpFillOn = False
> res at mpOutlineOn = True ; turn the map outline on
> res at mpMinLatF = 37.85 ; Zoomed in Lat and Lon
> res at mpMaxLatF = 38.50
> res at mpMinLonF = -120.0
> res at mpMaxLonF = -119.35
> res at gsnLeftString = ""
> res at gsnCenterString = "Geopotential Height at 600 hpa on Jan 11 at
> 22:40UTC"
> res at gsnStringFontHeightF = 0.020
> res at gsnRightString = ""
> res at gsnMaximize = True
> res at mpShapeMode = "FreeAspect"
> res at lbTitleString = "Terrain (m)"
> res at lbTitlePosition = "Right"
> res at lbTitleDirection = "Across"
> res at lbTitleAngleF = 90.
> res at lbTitleFontHeightF = 0.015
> res at gsnAddCyclic = False
>
> ;------wind vectors
> res2 = True
> res2 at gsnDraw = False
> res2 at gsnFrame = False
> res2 at vcWindBarbLineThicknessF= 3.0
> res2 at vcRefLengthF= 0.018
> res2 at vcRefMagnitudeF= 10
> res2 at vcMinDistanceF = 0.05
> res2 at vcGlyphStyle = "WindBarb"
> res2 at gsnLeftString = ""
> res2 at gsnRightString = ""
> res2 at vcRefAnnoOn = False
> res2 at gsnAddCyclic = False
>
>
> ;------Melted
> ;res4 = True
> ;res4 at cnLineColor = "Black"
> ;res4 at gsnContourLineThicknessesScale = 2.0
> ;res4 at cnLineLabelBackgroundColor = -1 ; transparent
> ;res4 at cnInfoLabelOn = False
> ;res4 at cnLevelSelectionMode = "ExplicitLevels"
> ;res4 at cnLevels = (/0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5,
> 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0/)
> ;res4 at cnLineLabelFontHeightF = 0.01
> ;res4 at cnLineLabelDensityF =2
> ;res4 at cnLineLabelsOn = True
> ;res4 at gsnAddCyclic = False
> ;liquid = gsn_csm_contour(wks,melt,res4)
>
> ;------Geopotential Height
> res5 = True
> res5 at gsnDraw = False
> res5 at gsnFrame = False
> res5 at cnLineColor = "Black"
> res5 at gsnContourLineThicknessesScale = 3.0
> res5 at gsnAddCyclic = False
> res5 at gsnLeftString = ""
> res5 at gsnRightString = ""
> res5 at cnInfoLabelOn = False
> geo = gsn_csm_contour(wks, z_plane, res5)
>
>
> contour = gsn_csm_contour_map(wks,hgt,res)
> vector = gsn_csm_vector(wks,u_wind,v_wind,res2)
> overlay(contour, geo)
> overlay(contour, vector)
>
> plres = True
> plres at gsLineColor = "blue"
> plres at gsLineThicknessF = 3.0
>
> lat = (/38.05, 38.05/)
> lon = (/-120.10, -119.35/)
>
> a = gsn_add_polyline(wks,contour,lon,lat,plres)
>
> pltres = True
> pltres at gsLineColor = "Black"
> pltres at gsLineThicknessF = 3.0
>
> lat1 = (/38.27, 38.27/)
> lon1 = (/-120.10, -119.35/)
>
> b = gsn_add_polyline(wks,contour,lon1,lat1,pltres)
>
> draw(contour)
> frame(wks)
>
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
>
>
> end
>
>
>
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