In 2005, NCAR did some wonderful junk science, disappeared the LIA, and tacked Hansen’s fake temperature record on to the end.
Ammann and Wahl’s findings contradict an assertion by McIntyre and McKitrick that 15th century global temperatures rival those of the late 20th century and therefore make the hockey stick-shaped graph inaccurate. They also dispute McIntyre and McKitrick’s alleged identification of a fundamental flaw that would significantly bias the MBH climate reconstruction toward a hockey stick shape. Ammann and Wahl conclude that the highly publicized criticisms of the MBH graph are unfounded.
The 1990 IPCC report showed that the LIA was the coldest period in 10,000 years, but somehow NCAR completely missed it.
So for fun, I overlaid NCAR’s toy hockey stick on the 1990 IPCC graph, in the image below. Terrifying, isn’t it? Clearly the Earth is going to end soon.