[ncl-talk] Interpolating CCSM grid to RAP/HRRR grid

[아나유즈바시츠]

Hi Malcom,

It seems to me that you are trying to regrid from curvilinear grid (with 2D
lat and lon) to rectilinear grid. You should rcm2rgrid function for that,
not linint, as the linint one is meant to interpolate from one rectilinear
grid to another.
 Try to use this
https://www.ncl.ucar.edu/Document/Functions/Contributed/rcm2rgrid_Wrap.shtml

On Wed, May 12, 2021 at 10:51 AM Wilson, Malcolm Tyree via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Hello Everyone,
>
> I've been trying to interpolate humidity and temperature data from CCSM to
> the RAP/HRRR grid using NCL (specifically using the function linint2_points
> and linint2_points_Wrap). I created a script that should interpolate the
> data from CCSM to the HRRR grid, but the script returned an array that
> contains nothing but filled values (9.96921e+36) and no data of the
> variable field I'm interpolating. I don't understand this happened, and I
> used both the linint2_points and linint2_points_Wrap functions. Is this
> supposed to happen, or and I'm missing something? Below is the code I used.
> Any advice would be appreciated. Thanks!
>
> -Malcolm W.
>
>   f = addfile ("~/small_hus_may_pert_2010-2050.nc","r")
>   g = addfile ("~/hrrr.t00z.wrfprsf00.nc","r")
>
>   lat = f->lat      ;(length=36)
>   lon = f->lon    ;(length=61)
>
>   lat2d = g->gridlat_0              ; (shape: (1059,1799))
>   lon2d = g->gridlon_0            ; (shape: (1059,1799))
>
>   LAT1D = ndtooned(lat2d)
>   LON1D = ndtooned(lon2d)
>
>   fi = f->hus_pert ;(humidity data I'm interpolating)
>
>   fo = linint2_points_Wrap(lon,lat,fi, False, LON1D,LAT1D, 0)
>
>   hrrr_data = onedtond( ndtooned(fo), (/1,26,1059,1799/) ) ;(conatins
> nothing but filled values)
>
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