By Anthony Watts
This report examines the accuracy and reliability of U.S. temperature stations from which official temperature records are reported, following up from a March 2009 study, titled “Is the U.S. Surface Temperature Record Reliable?” The original report found the ground-based system for measuring surface temperatures in the United States was biased by asphalt, machinery, and other heat-producing, heat-trapping, or heat-accentuating objects located near many official temperature stations and their sensory equipment. The new study reexamines these temperature stations and equipment to determine whether there remains flaws in the official U.S. surface temperature record. This report finds approximately 96 percent of U.S. temperature stations fail to meet whatthe National Oceanic and Atmospheric Administration (NOAA) considers to be “acceptable,” uncorrupted placement. These findings strongly undermine the legitimacy and the magnitude of the official consensus on long-term climate warming trends.