This will trigger some “scientific” bum-clenching:
PRESS RELEASE – U.S. Temperature trends show a spurious doubling due to NOAA station siting problems and post measurement adjustments.
Chico, CA July 29th, 2012 – 12 PM PDT – FOR IMMEDIATE RELEASE
A comparison and summary of trends is shown from the paper. Acceptably placed thermometers away from common urban influences read much cooler nationwide:
This blog has said it all along: Airports, where the majority of official temperature recordings are made, are warmer places than the natural terrain.