Instead, they
discuss new ways
of playing around with the aerosol judge factor needed to explain why 20th - century warming is about half
of the warming expected for increased in GHGs; and then expand their list
of fudge factors to include smaller volcanos, stratospheric water vapor (published with no estimate
of uncertainty for the predicted change in Ts), transfer
of heat to the deeper ocean (where changes in heat content are hard to accurately
measure), etc..