Donald Wuebbles, a professor of atmospheric sciences at the University of Illinois at Urbana-Champaign, is going to do the thing the IPCC wishes people would not do; attribute local weather events to climate change.
The hurricanes and droughts like we had in 2012 will be more frequent in future U.S. five-day forecasts, as will other extreme weather events, and it's because of human-driven climate change he argues today at the AAAS meeting in Boston. In the 1950s, the number of days that set record high temperatures was equal to the number of days that set record low temperatures. By the 2000s, the United States was twice as likely to see a record high as a record low.