4 ms·

It wasn't clear in legend, what is the "normal", average of 1880-2017?

• SiempreViernes 8y ago
  We don't really know what the "normal" temperature is, the climate is a very dynamic system without any obvious fixpoint. Here they've chosen to take the average over 1951-1980 and use that as the reference.
  • deleted 8y ago
    [deleted]
  • bequanna 8y ago
    What exactly was the rationale behind picking this period?
    • stan_rogers 8y ago
      The middle of that period represents "the good old days" for old farts like me, I'd suppose.
      • SiempreViernes 8y ago
        There was also a sizeable cold anomaly during war2, or it might simply be that the data-set gets spottier the further back you go.