Back in Hansen’s “respected” days, he predicted that a complete cessation of CO2 emitting on the part of humans would result in a temperature rise of X. Humans continued emitting at every higher rates every after, and temperature nudged up something less than 1/4X, and this was back before the current nearly multi-decade pause.
In the real world, people are fired for screwing the pooch that badly, so please forgive those of us who live there, and can’t afford to be distracted by those who substitute “respected” for results.
Hansen is also the "respected’ guy that decided to change the entire profile of the US from one of neutral to one of warming by “fixing” the temperature data until warming profile emerged (in about 1999 or 2000 I believe). Statistical manipulation, be it by Hansen or Mann, is statistical manipulation, and while it might be “respected” by some for its cleverness, even blog owners probably understand you can achieve any number you wish from another by simply multiplying the first by whatever factor is necessary.
I recommend more investigation on the part of everyone prior to falling for something hook, line and sinker because it comes from “scientist”.