The Hockey Stick: The Most Controversial Chart in Science, Explained
The hockey stick was repeatedly attacked, and so was Mann himself. Congress got involved, with
demands for Mann's data and other information, including a computer code used in his research. Then the National Academy of Sciences
weighed in in 2006, vindicating the hockey stick as good science and noting:
"The basic conclusion of Mann et al. (1998, 1999) was that the late 20th century warmth in the Northern Hemisphere was unprecedented during at least the last 1,000 years. This conclusion has subsequently been supported by an array of evidence that includes both additional large-scale surface temperature reconstructions and pronounced changes in a variety of local proxy indicators, such as melting on ice caps and the retreat of glaciers around the world."
It didn't change the minds of the deniers, though--and soon Mann and his colleagues were drawn into the 2009 "
Climategate" pseudo-scandal, which purported to reveal internal emails that (among other things)
seemingly undermined the hockey stick. Only, they didn't.
In the meantime, those wacky scientists kept doing what they do best--finding out what's true. As Mann relates, over the years other researchers were able to test his work using "more extensive datasets, and more sophisticated methods. And the bottom line conclusion doesn't change." Thus the single hockey stick gradually became what Mann calls a "hockey team." "If you look at all the different groups, there are literally about two dozen" hockey sticks now, he says.
Either that, or believe that all the scientists involved in the more than two dozen studies are involved in fraud. What you are claiming is hardly different that what jc, Silly Billy, and LaDexter claim.