[ncl-talk] Pressure Vertical Axis

[Soma Roy]

You can use pressure height vector in this case.

Hope this may help.

Thanks.

On Thu, Jul 26, 2018, 00:28 MELISSA KAZEMI RAD <
mk1369 at scarletmail.rutgers.edu> wrote:

> Hi,
>
> I am trying to create a vertical cross_section plot from a wrf output
> file. I have spent a lot of time looking through all example ncl codes,
> trying to figure out how to have the y-axis, representing the vertical
> height show pressure values in pa, rather than the number of eta-levels.
>
> Here is my NCL code:
>
> 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"
> ;----------------------------------------------------------------------
>  ; Main code
>  ;----------------------------------------------------------------------
>  begin
>   a = addfile("wrfout_d03_2017-07-17_06_00_00.nc","r")
>
> ;   type = "x11"
> ;   type = "pdf"
> ;   type = "ps"
>     type = "png"
>
>    wks = gsn_open_wks(type,"EQTemp_Press_Cross_166")
>
>    time = 166
>
>     p    = wrf_user_getvar(a, "pressure", time)    ; Total Pressure
>     P    = wrf_user_getvar(a, "P", time)
>     PB   = wrf_user_getvar(a, "PB",time)
>     T    = wrf_user_getvar(a,"T",time)
>     U    = wrf_user_getvar(a, "ua", time)
>     V    = wrf_user_getvar(a, "va", time)
> ;   z    = wrf_user_getvar(a,"z",time)
>     qv   = wrf_user_getvar(a, "QVAPOR", time)
>
>
>     T_t  = T + 290.        ; potential temperature in K.
>     P_t  = P + PB
>     tk   = wrf_tk(P_t, T_t)
>     eth  = wrf_eth(qv, tk, P_t)
>     plane = (/342, 1387/)
>     t_plane = wrf_user_intrp3d(eth,p,"v",plane,50.,False)
>     P_plane = wrf_user_intrp3d(P,p,"v",plane,50.,False)
>
>     printVarSummary(t_plane)
>
>     res                     = True
>     res at MainTitle           = "Vertical Cross-Section of Potential
> Temperature"
>     res at InitTime            =  False
>     res at TimePos             = "Left"
>     res at Footer              = False
>     res at lbTitleOn           = True
>     res at lbTitleString       = "Temperature"
>     res at tmYLMode            = "Explicit"
>     res at tmYLValues          = (/1000, 850, 700, 500, 400, 300, 250,\
>                                    200,  150, 100, 50, 10/)
>     res at tmYLLabels          = "" + res at tmYLValues
>     res at tmXBLabelFontHeightF = 0.015
>     res at tmYLLabelFontHeightF = 0.015
>
>
>     tres                     = res
>     tres at cnFillOn            = True
>     tres at cnFillPalette       = "BlWhRe"
>     tres at cnSpreadcolor       = True
>
>
>     pres                         = res
>     pres at cnFillOn               = False
>     pres at ContourParameters      = (/ 2. /)
>     pres at cnInfoLabelFontHeightF = 0.01
>
>
>
>
>     T_contour =  wrf_contour(a,wks,t_plane,tres)
>     P_contour = wrf_contour(a,wks,P_plane,pres)
>
>     pltres             = True
>     pltres at gsnMaximize = True
>
>    plot  = wrf_overlays(a,wks,(/T_contour, P_contour/), pltres)
>
> end
>
> I'd really appreciate your help.
>
> Bests,
> Melissa
>
>
>
>
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