Thanks to Charles Muller, he has alerted us to two new papers on the urban heat island effect on temperature trends. 

Just days before former Vice President Al Gore’s scheduled visit to testify about global warming before the U.S. Senate Committee on Environment & Public Works, a high profile climate debate between prominent scientists Wednesday evening ended with global warming skeptics being voted the clear winner by a tough New York City before an audience of hundreds of people.

Discussions on global warming often refer to ‘global temperature.’ Yet the concept is thermodynamically as well as mathematically an impossibility, says Bjarne Andresen, a professor at The Niels Bohr Institute, University of Copenhagen, who has analyzed this topic in collaboration with professors Christopher Essex from University of Western Ontario and Ross McKitrick from University of Guelph, Canada.