The Wall Street Journal on Saturday ran an interesting little new story by John Fialka on why the long-term outlook for global warming may be "more dire than suggested" by the IPCC’s just-released Fourth Assessment on Climate Change.
Two reasons: first, as Andrew Dressler already mentioned in a post below, the report doesn’t fully take into account the melting of ice sheets. That’s according to Tom Delmore, a climate modeler with the National Oceanographic and Atmospheric Association.
Second, because of the limits of computing power, the report probably underestimates the amount of warming that will be caused by increasing amounts of water vapor in the atmosphere. That’s according to Jim Butler, also with NOAA.
The story ran under an oddly inane headline, but it’s still very much worth reading.