dset ^ao.monthly.b79.e00.1000za.clim79-00.loading.pattern undef -9.99E+33 OPTIONS big_endian title NCEP/NCAR ReANL (monthly 1000 Za):using 79-00 climatology xdef 144 linear 0.000 2.500 ydef 29 linear 20.000 2.500 zdef 1 levels 1 1 tdef 1 linear JAN1979 1mo VARS 2 eof 1 00 1000 Z (18.9%) reg 1 00 1000 Z ENDVARS