Have a look at this chart. It tells you pretty much all you need to know about the much-anticipated scoop by Anthony Watts of Watts Up With That?
What it means, in a nutshell, is that the National Oceanic and Atmospheric Administration (NOAA) – the US government body in charge of America’s temperature record, has systematically exaggerated the extent of late 20th century global warming. In fact, it has doubled it.
Is this a case of deliberate fraud by Warmist scientists hell bent on keeping their funding gravy train rolling? Well, after what we saw in Climategate anything is possible. (I mean it’s not like NOAA is run by hard-left eco activists, is it?) But I think more likely it is a case of confirmation bias. The Warmists who comprise the climate scientist establishment spend so much time communicating with other warmists and so little time paying attention to the views of dissenting scientists such as Henrik Svensmark – or Fred Singer or Richard Lindzen or indeed Anthony Watts – that it simply hasn’t occurred to them that their temperature records need adjusting downwards not upwards.