I have to hand it to Steve McIntyre over at Climate Audit, he’s relentless in the pursuit of pointing out the problems with the famous Michael Mann paper that created the infamous “hockey stick” graph that became an icon for climate change.
McIntyre just posted his most recent discovery of the previously unnoticed Mannian technique used in the paper that apparently allows just a few trees in the in the USA to define the climate for the rest of the world, or as I call it “climate divining”. He writes:
The problem is far more than bristlecones merely being antennae for world temperature. U.S. trees, analysed according to Mannian methods, are supposedly capable of reconstructing ENSO, the Chinese monsoon, the East Asian monsoon, the PDO, the North Atlantic Oscillation, the Indian Ocean Dipole – did I leave anything out?
Its funny stuff, and also sad in the revealing of the contortions applied to get the “hockey stick” to appear. It’s worth a look.