What they are suggesting is that the analysis used by Mann, Bradley & Hughes can produce hockey stick shaped temperature reconstructions even if the data is simply random red noise. The conclusion is, therefore, that the Mann, Bradley & Hughes analysis is flawed and that the Hockey Stick is not real.
Nope.
For starters, this study is for Nothern Europe Summer temperatures only (the study's title is a bit of a giveaway: "Northern European summer temperature variations over the Common Era from integrated tree-ring density records" and can thus not be compared the global temperature reconstructions.
Secondly, Mann's results have been independently confirmed by a whole range of papers using temperature proxies which are non-tree ring based.
Exactly - It's like the believers have so much invested in this bogus hookey stick. This was disproven many years ago when it was shown that even random numbers create the same silly pattern. It compares to seeing a religious icon in the bread of a grilled cheese sandwich.
But Alph --- the Medieval Warm Period WAS GLOBAL. Nothing in science has ever been better documented: More than 300 peer-reviewed papers from all over the world confirm: http://co2science.org/data/mwp/mwpp.php
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If it get any colder we can play as much hockey as we want.
no. northern europe is not global.
No, it never was, stop trolling.
it never was
Paper by Esper et al shows Northern Europe in a 2000 yr cooling trend, with Medieval Warm Period warmer than now. Directly contradicting some of the confirming hockey sticks, though Mann's original is based on bristlecone pines.
http://1-ps.googleusercontent.com/xk/-VEEfGChBP5mgx8qY_eD0fhvW8/www.powerlineblog.com/i2.wp.com/www.powerlineblog.com/admin/ed-assets/2014/12/xesperetal2014b.jpg,qresize=580,P2C434.pagespeed.ic.hEMzezNe8JOAs_kqbWqW.jpg
