In 1975, the National Academy of Sciences showed about 0.5C cooling in the Northern Hemisphere from 1938 to 1968.
A 1977 surface station study reported in Nature, showed the same thing. This was confirmed by atmospheric measurements at NOAA and the German weather office.
The report, prepared by German, Japanese and American specialists, appears in the Dec. 15 issue of Nature, the British journal. The findings indicate that from 1950 to 1975 the cooling, per decade, of most climate indexes in the Northern Hemisphere was from 0.1 to 0.2 degrees Celsius, roughly 0.2 to 0.4 degrees Fahrenheit.
There was unanimous consensus of scientists that the Earth was cooling.
Arctic ice was expanding, worrying the US and Soviet Union.
Norwegian glaciers were growing for the first time in 200 years.
The National Center for Atmospheric Research confirmed this global cooling trend.
The cooling was indisputable.
This cooling wrecked the global warming story, so Gavin Schmidt at NASA has almost completely erased the indisputable global cooling trend.
The image below overlays the NASA graph on the 1975 National Academy of Sciences graph. Note that the two graphs are nearly identical until 1940, but after 1940 there is a very sharp divergence.
People like Gavin Schmidt understand that they can doing this sort of data tampering, because people don’t remember the past. All they have to do is say they are making the data better, and that the changes are all peer-reviewed.
But is is fake data, fake science and fake news. It is intended to deceive the public and corrupt public policy.