 

Field
NCEP/NCAR 500mb height
mean daily NMC Reanalysis (1948)
X axis: whole world in 144 2.50° steps, first point at 0.00° E, last point at 357.50° E Y axis: regular grid with 73 2.50° steps, first point at 90.00° N, last point at 90.00° S Z at 500.00 millibar air_pressure 1daily data available from 01Jan1948 to 06Aug2018 ( 25839 times) Variable hgt (mean Daily Geopotential height) in m Full metadata. Construct a statistical forecast model from this field Compute zonal mean
If you really want to get it here, NCEP/NCAR 500mb height is available as a netcdf file (size 251.2 MB). 
© KNMI
