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The term hockey stick graph was popularized by the climatologist Jerry Mahlman, to describe the pattern shown by the Mann, Bradley & Hughes 1999 (MBH99) reconstruction, envisaging a graph that is relatively flat with a downward trend to 1900 as forming an ice hockey stick's "shaft" followed by a sharp, steady increase corresponding to the ...
The CEI blog editor then removed the sentence as "inappropriate", but a National Review blog post by Mark Steyn cited it and alleged that Mann's hockey stick graph was "fraudulent". [69] [70] Mann asked CEI and National Review to remove the allegations and apologize, or he would take action. [68]
The Hockey Stick and the Climate Wars: Dispatches from the Front Lines is a 2012 book about climate change by the American climatologist and geophysicist Michael E. Mann.In the book Mann describes how he became a researcher investigating the temperature record of the past 1000 years and was lead author, with Raymond S. Bradley and Malcolm K. Hughes, on the 1999 reconstruction that was the ...
The curve shown in graphs of these reconstructions is widely known as the hockey stick graph because of the sharp increase in temperatures during the last century. As of 2010 [update] this broad pattern was supported by more than two dozen reconstructions , using various statistical methods and combinations of proxy records, with variations in ...
A hockey stick graph or hockey stick curve is a graph, or curve shape, that resembles an ice hockey stick, in that it turns sharply from a nearly flat "blade" to a long "handle". In economics , [ 1 ] [ 2 ] marketing , [ 3 ] and dose–response relationships , [ 4 ] [ 5 ] a hockey stick graph is one in which the "blade" is near zero (hugging the ...
At the press conference, Hand also commented on the well publicised 1998 paper produced in the United States by scientists led by Michael E. Mann, saying that the hockey stick graph it showed was a genuine effect, but he had an "uneasy feeling" about the use of "inappropriate statistical tools" and said that the 1998 study had exaggerated the ...
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