In 1999, Hansen showed that the 1930’s was much hotter in the US than the 1990’s
By James Hansen, Reto Ruedy, Jay Glascoe and Makiko Sato — August 1999
Empirical evidence does not lend much support to the notion that climate is headed precipitately toward more extreme heat and drought. The drought of 1999 covered a smaller area than the 1988 drought, when the Mississippi almost dried up. And 1988 was a temporary inconvenience as compared with repeated droughts during the 1930s “Dust Bowl” that caused an exodus from the prairies, as chronicled in Steinbeck’s Grapes of Wrath.
in the U.S. there has been little temperature change in the past 50 years, the time of rapidly increasing greenhouse gases — in fact, there was a slight cooling throughout much of the country (Figure 2)
That same year, NOAA published this graph showing the 1990’s as much hotter than the 1930’s.
The animation below shows how NOAA massively cooled the 1930’s, and massively heated the 1990’s. This tampering is one of the cornerstones of the global warming fraud story.
Dave Burton sent this E-mail exchange discussing it