Do not use the term “climatologists”. Since the study of climate is a legitimate field of study, don’t give it the sense of being false because a group of very poor scientists have attempted to use scare tactics to gain research grants.
The record of ground based temperature were changed circa 1999. NASA Massively Tampering With The US Temperature Record | Real Science
Also there is clear evidence that NOAA has been manipulating data with an end result intent: How the US Temperature Record is Adjusted - Jennifer Marohasy
Further proof of the changing data with no purpose other than to build a case for something that isn’t apparent in the data is here: Hansen's NASA GISS – cooling the past, warming the present – Watts Up With That?
The end result of all of this is that the people maintaining the temperature records at both NASA and NOAA should be immediately discharged. These indications of “man-mad global warming” have NOT been either factual or accidental and this sort of thing demands prosecution.
