Way back in 1998 people just didn’t know how to measure temperatures properly, so Hansen recently had to add 0.3C to 1998 temperatures. In the 1930s people were also too dumb to read thermometers, but they had the opposite problem and always read them a few tenths of a degree too high.
Fortunately we have very smart people like James Hansen and Tom Karl who can travel back in time and measure the actual temperatures .
When I tell people about the data tampering, they go into shock. But it isn’t like they totally disbelieve it either.
What the NOAA & GISS climate campaigners did to the U.S. temperature data was relatively restrained compared to what the Aviso folks did to ENVISAT’s sea-level data:
http://stevengoddard.wordpress.com/2012/04/24/was-envisat-tortured-to-death/
That data OBVIOUSLY needs to be adjusted – the models say it is WARMING, so it MUST be WARMING.