When you consider the location and situation of these stations, it's makes you wonder why this wasn't picked up on earlier and why it doesn't appear to be a newsworthy story for the media to run with.
Download the report below.
Anthony Watts
How do we know global warming is a problem if we can't trust the U.S. temperature record?
The official record of temperatures in the continental United States comes from a networkof 1,221 climate-monitoring stations overseen by the National Weather Service, a department of the National Oceanic and Atmospheric Administration (NOAA). Until now,no one had ever conducted a comprehensive review of the quality of the measurement environment of those stations.
During the past few years I recruited a team of more than 650 volunteers to visually inspect and photographically document more than 860 of these temperature stations. We were shocked by what we found.
We found stations located next to the exhaust fans of air conditioning units, surrounded by asphalt parking lots and roads, on blistering-hot rooftops, and near sidewalks and buildings that absorb and radiate heat. We found 68 stations located at wastewater treatment plants, where the process of waste digestion causes temperatures to be higher than in surrounding areas.
In fact, we found that 89 percent of the stations – nearly 9 of every 10 – fail to meet the National Weather Service’s own siting requirements that stations must be 30 meters (about 100 feet) or more away from an artificial heating or radiating/reflecting heat source.
In other words, 9 of every 10 stations are likely reporting higher or rising temperatures because they are badly sited.
Download Surfacestationsreport_spring09