Sometime between 1997 and 1998, global “science” leaders changed the earth’s ‘average’ historic temperature from 15 degrees C to 14 degrees C

To Promote the Government’s Climate Change Narrative

An astounding change in a basic scientific standard was quietly made in the late 1990s. Government propagandists succeeded in changing the supposed “average base temperature” of the planet. “It is hard to pinpoint the exact date when the change from 15 degrees to 14 degrees was introduced.  It most likely happened sometime in 1997, and definitely no later than January of 1998.”

In March 1988, a few months before NASA’s James Hansen asserted before the Congress that global warming was in progress, the New York Times quoted him as saying that he used 59 degrees Fahrenheit as the average global temperature to calculate the temperature variations. But NASA, James Hansen, and every other government institution and “leader” subsequently changed their baseline average temperature for the planet earth.

Today, all government institutions say that the average, proper, traditional global temperature for the planet is 14 degrees Centigrade rather than 15.

This change makes the present seem warmer than the supposed past average.

See here.