When Measurement Bias Becomes Climate Change

I often cite the WattsUpWithThat? blog, hosted by former TV meteorologist Anthony Watts. It's an excellent place to spot-check climate change math, including detail on the siting, repositioning and technology, of weather recording instruments. I particularly recommend his occasional series on "How not to measure temperature"--Part 75 was posted Thursday. Much of the information from such articles is recorded in Watts's "surface station project," a database of weather station siting.