it later emerged that its creator dr michael mann had spliced too [sic] datasets together – tree-rings showing temperatures going back hundreds of years, then recent thermometer readings for the more recent decades.
it later emerged that its creator dr michael mann had spliced too [sic] datasets together – tree-rings showing temperatures going back hundreds of years, then recent thermometer readings for the more recent decades.
hockey stick graph:252
hockey stick graph
using various high-resolution proxies including tree rings, ice cores and sediments, mann and jones published reconstructions in august 2003 which indicated that "late 20th century warmth is unprecedented for at least roughly the past two millennia for the northern hemisphere.