<div dir="ltr">Hi Malcom,<br><br>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. <br> Try to use this <a href="https://www.ncl.ucar.edu/Document/Functions/Contributed/rcm2rgrid_Wrap.shtml">https://www.ncl.ucar.edu/Document/Functions/Contributed/rcm2rgrid_Wrap.shtml</a></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 12, 2021 at 10:51 AM Wilson, Malcolm Tyree via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">




<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<span style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">Hello Everyone,</span>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)"><br>
</div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">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 <span style="margin:0px;background-color:rgb(255,255,255);display:inline">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!</span></div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)"><br>
</div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">-Malcolm W.<br>
</div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)"><span style="margin:0px;background-color:rgb(255,255,255);display:inline"><br>
</span></div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)"><span style="margin:0px;background-color:rgb(255,255,255);display:inline">  f = addfile ("~/<a href="http://small_hus_may_pert_2010-2050.nc" target="_blank">small_hus_may_pert_2010-2050.nc</a>","r")
<div style="margin:0px">  g = addfile ("~/<a href="http://hrrr.t00z.wrfprsf00.nc" target="_blank">hrrr.t00z.wrfprsf00.nc</a>","r")</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">  lat = f->lat      ;(length=36)</div>
<div style="margin:0px">  lon = f->lon    ;(length=61)</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">  lat2d = g->gridlat_0              ; (shape: (1059,1799))</div>
<div style="margin:0px">  lon2d = g->gridlon_0           <span> </span><span style="margin:0px;background-color:rgb(255,255,255);display:inline">; (shape: (1059,1799))</span></div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">  LAT1D = ndtooned(lat2d)       </div>
<div style="margin:0px">  LON1D = ndtooned(lon2d)</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">  fi = f->hus_pert ;(humidity data I'm interpolating) </div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">  fo = linint2_points_Wrap(lon,lat,fi, False, LON1D,LAT1D, 0)</div>
<div style="margin:0px"><br>
</div>
  hrrr_data = onedtond( ndtooned(fo), (/1,26,1059,1799/) ) ;(conatins nothing but filled values)</span></div>
<br>
</div>
</div>

_______________________________________________<br>
ncl-talk mailing list<br>
<a href="mailto:ncl-talk@mailman.ucar.edu" target="_blank">ncl-talk@mailman.ucar.edu</a><br>
List instructions, subscriber options, unsubscribe:<br>
<a href="https://mailman.ucar.edu/mailman/listinfo/ncl-talk" rel="noreferrer" target="_blank">https://mailman.ucar.edu/mailman/listinfo/ncl-talk</a></blockquote></div>