Changes

The Yamal samples were collected by two Russian scientists, Hantemirov and Shiyatov. However, their findings did not show anything resembling a hockey stick pattern. The Yamal data was rejiggered by Steven Briffa to fit a hockey stick pattern and published in 2000. Briffa's paper was seized upon by Mann and other researchers who found the MWP to be an inconvenience.

The Yamal samples were collected by two Russian scientists, Hantemirov and Shiyatov. However, their findings did not show anything resembling a hockey stick pattern. The Yamal data was rejiggered by Steven Briffa to fit a hockey stick pattern and published in 2000. Briffa's paper was seized upon by Mann and other researchers who found the MWP to be an inconvenience.

Mann's graph appeared prominently in the report of the UN's Intergovernmental Panel on Climate Change, used a basis for international policy on climate change. YAD06 has been dubbed, "the most influential tree in the world." Even the cherry-picked YAD06 data did not correspond closely enough to a hockey stick pattern to serve Mann's purpose. It shows a temperature decline since 1960, which is unrepresentative of the pattern of global temperature as a whole. This inconvenient trend, which may represent the decline of YAD06 due to old age, was disguised with further manipulation. For the post-1960 period, "Mike [Mann]'s Nature trick of adding in the real temps" was used to "hide the decline," according to the [[Climategate]] emails.<ref>Booker, Christopher, "[http://www.telegraph.co.uk/comment/columnists/christopherbooker/6738111/Climategate-reveals-the-most-influential-tree-in-the-world.html Climategate reveals 'the most influential tree in the world']", ''The Telegraph'', Dec. 5, 2009.</ref>

Mann's graph appeared prominently in the report of the UN's Intergovernmental Panel on Climate Change, used a basis for international policy on climate change. YAD06 has been dubbed, "the most influential tree in the world." Inconveniently for Mann, YAD06's growth has slowed since 1960, possibly due to the tree's age. The trend was disguised with further manipulation. For the post-1960 period, "Mike [Mann]'s Nature trick of adding in the real temps" was used to "hide the decline," according to the [[Climategate]] emails.<ref>Booker, Christopher, "[http://www.telegraph.co.uk/comment/columnists/christopherbooker/6738111/Climategate-reveals-the-most-influential-tree-in-the-world.html Climategate reveals 'the most influential tree in the world']", ''The Telegraph'', Dec. 5, 2009.</ref>

In 2013, the Climate Research Unit of the University of East Anglia quietly revised its Yamal data set.<ref name=McIntyre>McIntyre, Steve, "[http://climateaudit.org/2013/06/28/cru-abandons-yamal-superstick/ CRU Abandons Yamal Superstick]", June 28, 2013.</ref> The current reconstruction, based on ring data gathered from dozens of trees, shows that the growth rate for trees in Yamal has been relatively stable for centuries, with no outstanding acceleration or deacceleration in the 20th century.<ref name=McIntyre/>

In 2013, the Climate Research Unit of the University of East Anglia quietly revised its Yamal data set.<ref name=McIntyre>McIntyre, Steve, "[http://climateaudit.org/2013/06/28/cru-abandons-yamal-superstick/ CRU Abandons Yamal Superstick]", June 28, 2013.</ref> The current reconstruction, based on ring data gathered from dozens of trees, shows that the growth rate for trees in Yamal has been relatively stable for centuries, with no outstanding acceleration or deacceleration in the 20th century.<ref name=McIntyre/>