"Anthony Watts of WattsUpWithThat.com and SurfaceStations.org published a 30 page white paper in 2009 with the help of the Heartland Institute titled “Is the U.S. Surface Temperature Record Reliable?” His conclusion was that the temperature record was not reliable due to problems with where thermometers are located.
If Watts were correct, this would be a major problem. If the entire US temperature record was unreliable, then conclusions drawn from the temperature record could also be similarly flawed. At a minimum, the scientific papers using the temperature record would have to be revisited. So a thorough investigation of Watts’ conclusion by scientists was warranted. And now a new peer-reviewed paper by scientists at the National Climate Data Center (NCDC) have analyzed the temperature record and found that Watts’ conclusion of a flawed temperature record runs contrary to the actual data."