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The red curve shows the global mean temperature, according HadCRUT4 data from 1850 onwards. In blue is the original hockey stick of Mann, Bradley and Hughes (1999 ) with its uncertainty range (light blue).
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 ...
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 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 ...
Printable version; In other projects ... Category:Bar chart templates - to make bar charts. ... Hockey stick graph; Horizon chart; I.
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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 original northern hemisphere hockey stick graph of Mann et al. 1999, smoothed curve shown in blue with its uncertainty range in light blue, overlaid with green dots showing the 30-year global average of the PAGES 2k Consortium 2013 reconstruction.