Interpolates ARW WRF 2D model data along a given line.
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl" ; These two libraries are automatically load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl" ; loaded from NCL V6.4.0 onward. ; No need for user to explicitly load. function wrf_user_intrp2d ( var2d : numeric, loc [*] : numeric, ; up to four values angle : numeric, res  : logical ) return_val : numeric
Data that will be interpolated. The rightmost dimensions of this array are ny x nx.loc
Interpolation information. Can contain up to four scalar values.
Use 2 values if extracting a line through a given point on the model domain. The two values represent the x/y location through which the line will pass. Must also specify angle in this case.
Use 4 values if extracting data from point A to point B. The 4 values represent the x/y locations of points A and B.angle
Only valid if a line will be extracted through a given point on the model domain. 0.0 represents S-N and 90.0 W-E.res
Set to True if extracting a line from point A to point B; otherwise set to False.
Data interpolated to a specified line on the model domain.
This function interpolates 2D model data onto a specified line.
Note: in NCL V6.5.0 a bug was fixed in this routine and in wrf_user_intrp3d in which the 0th grid point was not being included when setting up the output domain, causing the output array to be missing a grid point in the rightmost dimension.
wrf_user_intrp2d is part of a library of functions and procedures in WRFUserARW.ncl written to help users plot ARW WRF model data.
See the full list of WRF functions.
a = addfile("wrfout_d01_2000-01-24_12:00:00.nc","r") wks = gsn_open_wks("x11","test") t2 = wrf_user_getvar(a,"T2",-1) ; get T2 data for all time periods dims = dimsizes(t2) plane = (/ dims(2)/2, dims(1)/2 /) ; pivot point (x,y) through center of domain angle = 90. ; plot from west to east opts = False ; start and end point not supplied X_plane = wrf_user_intrp2d(t2,plane,angle,opts)You can see some other example scripts and their resultant images at: