wrf_user_ll_to_ij function

Hello,

I am trying to use wrf_user_ll_to_ij function to find the nearest wrf model
grid indices of a 2d lat/lon array (which is converted to 1d before use). I
used the WPS geogrid output file (geo_d01.nc) as the file handle in the
function, as follows:

    r0_lat1d = ndtooned(r0_lat2d)
    r0_lon1d = ndtooned(r0_lon2d)
    geo_file = addfile("geo_d01.nc", "r")
    opt = True
    opt@returnInt = True
    cell_ij = wrf_user_ll_to_ij(geo_file, r0_lon1d, r0_lat1d, opt)
    cell_ij = cell_ij - 1 ; convert to ncl subscripts

I got negative values in cell_ij, which is wrong. Can someone help me out ?

Thanks!

Xin

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Received on Sun Oct 7 08:37:07 2012