What Warming?

clipped from wattsupwiththat.com My last few posts have described a new method for quantifying the average Urban Heat Island (UHI) warming effect as a function of population density, using thousands of pairs of temperature measuring stations within 150 km of each other. The results supported previous work which had shown that UHI warming increases logarithmically with population, with the greatest rate of warming occurring at the lowest population densities as population density increases. This is a very significant result. It suggests the possibility that there has been essentially no warming in the U.S. since the 1970s. Also, note that the highest population class actually exhibits slightly more warming than that seen in the CRUTem3 dataset. This provides additional confidence that the effects demonstrated here are real. Finally, the next graph shows the difference between the lowest population density class results seen in the first graph above. This provides a better idea of which years contribute

And odd isn't it how the warming started when the AGW campaign did?