Human-Induced Warming in Tucson?

090605 Wry Heat
We’ve all seen headlines that say, in effect, it was the warmest year since….. it was cooler. Is it really getting warmer or is at least some of the temperature rise artificially induced because of the places we put our thermometers?
In the U.S. there are 1,221 stations in the U.S. Historical Climate Network (USHCN); these are the official stations measuring temperature.
One of those stations occurs on the University of Arizona campus. Its temperature record certainly shows warming, see figure below.