Laughable new paper claims 99.999% certainty global warming over past 25 years is man-made

The claim of 99.999% is so utterly ridiculous that I can’t believe anyone seriously wrote it.

However, Anthony’s put together a very concise summary debunking this whole “it must be man-made” claim. The 1910-1940 warming is key – because that warming must be largely natural, and by inference whatever caused that could easily be responsible for the 1970-2000 warming. How unlikely that is depends on the noise model you assume, however based on my assessment I’ve always (since at least 2009) said that “the 1970-2000 warming is entirely consistent with natural variation and cannot be distinguished from noise”.

Watts Up With That?

I was tipped off to this paper by a Tweet from SkS Reichfurher John Cook, and I started on writing a rebuttal, but discovered The Hockey Schtick had already done a complete job, so I’ve reposted it here.  -Anthony
The Hockey Schtick writes: A new paper published in a journal called “Climate Risk Management” claims a ridiculous degree of “certainty” of  99.999% that global warming over the past 25 years is man-made. The claim is made based upon climate models already falsified at confidence levels of 98%+.

According to the authors,

“there is less than a one in one hundred thousand chance of observing an unbroken sequence of 304 months [25.3 years] (our analysis extends to June 2010) with mean surface temperature exceeding the 20th century average.”

Fundamental problems with this claim [which is basically the falsified IPCC attribution claim of 95% certainty on steroids] include:

There is no statistical…

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