An addition to this post on 5 year averages. But today I am using Outgoing Longwave Radiation from the NOAA. I had to first calculate the 1971-2000 anomalies. I started using that baseline because Canadian data that I downloaded already had the 1971-2000 normals calculated.
Why OLR? Read this post by the Inconvenient Skeptic. “The warmer the Earth is, the faster it loses energy to space.”
I am using Northern Hemisphere Data because so far, my “5 year averages” posts have been in the USA, Canada and the UK.