ncatted -O -h -a sphere_radius,global,m,f,6371229.0 /global/cfs/cdirs/e3sm/inputdata/ice/mpas-cice/oARRM60to10/seaice.ARRM60to10.180715.nc /global/cfs/cdirs/e3sm/inputdata/ice/mpas-cice/oARRM60to10/seaice.ARRM60to10.180715_newradius.nc