Tuesday, November 13, 2018

Michael Mann’s Hockey Stick Was Too Short

https://cdn.theatlantic.com/static/mt/assets/science/marcott-B-CD.jpg
“Back in 1999 Penn State climate scientist Michael Mann released the climate change movement's most potent symbol: The "hockey stick”, a line graph of global temperature over the last 1,500 years that shows an unmistakable, massive uptick in the twentieth century when humans began to dump large amounts of greenhouse gases into the atmosphere. It's among the most compelling bits of proof out there that human beings are behind global warming, and as such has become a target on Mann's back for climate denialists looking to draw a bead on scientists.

Now it's gotten a makeover: A study published reconstructs global temperatures further back than ever before -- a full 11,300 years. The new analysis finds that the only problem with Mann's hockey stick was that its handle was about 9,000 years too short...”

11,000 years worth of climate change data:
https://www.theatlantic.com/technology/archive/2013/03/were-screwed-11-000-years-worth-of-climate-data-prove-it/273870/
Michael Mann’s Climate War:
https://www.theguardian.com/environment/2012/feb/17/michael-mann-climate-war?intcmp=122

More of the ‘rest of the story’:
http://samslair.blogspot.com/2019/10/interglacial-temps-tempered-by-younger.html?m=1

Short Comments Relating to AGW:
http://samslair.blogspot.com/2019/12/short-comments-relating-to-agw.html?m=1

Even if one looks only at the past 1,000 years, when all of the different ‘hockey stick graphs’ are overlaid, it becomes apparent that ‘at no point’ did global overall temperatures ever rise higher than what we’re experiencing now —
“The Truth Behind Mann’s Hockey Stick” (4 minutes) — the above statement is found at the two minute mark:
https://youtu.be/r9jtVZ3RUCU