ncrcat -v O1,O2,TN,Z,mtime,nflds pyr*.nc pyr1996_tiegcm1.93.nc
ncrcat -v O1,O2,TN,Z,mtime,nflds pyr060[0-3]*.nc pyr06040.nc pyr06001-06040.nc
ncrcat -v O1,O2,TN,Z,mtime,nflds pyr960[0-2]*.nc pyr96_kp1.nc