Revised Estimates of Warming are Higher

MIT's centre for Global Climate Change Science have revised their best guess of temperature rise by the end of the century if humanity continues with business-as-usual - to 5.2˚C. This is well in excess of the median estimate in the worst-case scenario looked at in the most recent IPCC report in 2007. With a 5˚ rise, we all fry of course, but this would still be better than the 9% chance they now think there is of a 7˚ rise. 7˚C! The conclusions of the MIT study confirm other recent revisions of temperature rise by the International Energy Agency (IEA), which has warned of a 6˚ rise if we remain on our current emissions trajectory, and the MET office's Hadley Centre, which also guesstimated a 5-7˚ rise if we don't change course.