NCEP "normal year" data as described in NCAR Tech Note 460 NCEP dn10 dens slp_ pslv q_10 shum t_10 tbot u_10 u v_10 v tn460nyf.ncep.T62.050922.nc time lon lat area mask tn460nyf.ncep.T62.050922.nc cp:/fis/cgd/cseg/csm/inputdata/dx7/