(1) ncks -v grid_yt /scratch2/NCEPDEV/stmp3/Youlong.Xia/coulped_snowDA/COMROOT/snowvar3/gdas.20210928/12/gdas.t12z.sfcanl.nc out_grid_yt.nc
(2) ncrename -h -O -v grid_yt,lat out_grid_yt.nc


or 
(3) ncrename --dimension grid_yt,lat out_grid_yt.nc

 do not work
(4) cdo invertlat out_grid_yt.nc out_grid_yt_reverse.nc
