claim: In one particularly damning email, CRU director Phil Jones said he had used ‘Mike’s Nature trick’ to ‘hide the decline’ in temperatures in the second half of the 20th century.
evidence: Many commentators quoted one email in which Phil Jones said that he had used Mike's Nature trick in a 1999 graph for the World Meteorological Organization to hide the decline in proxy temperatures derived from tree-ring analyses when measured temperatures were actually rising.