 

Field
NOAA/UMD OLR
Daily OLR CDR Product Ver01Rev02
X axis: whole world in 360 1.00° steps, first point at 0.50° E, last point at 359.50° E Y axis: regular grid with 180 1.00° steps, first point at 89.50° S, last point at 89.50° N 1daily data available from 01Jan1979 to 31Dec2018 ( 14640 times) , time refers to the reference time Variable olr (NOAA Climate Data Record of Daily Mean Upward Longwave Flux at Top of the Atmosphere) in W m2 Full metadata. Construct a statistical forecast model from this field Compute zonal mean
Compute annual cycle
If you really want to get it here, NOAA/UMD OLR is available as a netcdf file (size 2405.04 MB). 
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