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View Diary: USA Today: Key climate denier report was plagiarism (162 comments)

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  •  How wrong can you be? (12+ / 0-)

    From your first cited source:

    What is most interesting is comparing our backcast to those from Mann et al. (2008) as done in Figure 17. We see that our model gives a backcast which is very similar to those in the literature, particularly from 1300 AD to the present. In fact, our backcast very closely traces the Mann et al. (2008) EIV land back-cast, considered by climate scientists to be among the most skilled. Though our model provides slightly warmer backcasts for the years 1000-1300 AD, we note it falls within or just outside the uncertainty bands of the Mann et al. (2008) EIV land backcast even in that period. Hence, our backcast matches their backcasts reasonably well.
    — McShane & Wyner

    And this debunks Mann how, exactly? This confirms existing hockey-stick graphs!

    From your second cited source:

    The basic conclusion of Mann et al.  (1998, 1999) was that the late 20th century warmth in the Northern Hemisphere was unprecedented during at least the last 1,000 years. This conclusion has subsequently been supported by an array of evidence that includes both additional large-scale surface temperature reconstructions and pronounced changes in a variety of local proxy indicators, such as melting on icecaps and the retreat of glaciers around the world, which in many cases appear to be unprecedented during at least the last 2,000 years. Not all individual proxy records indicate that the recent warmth is unprecedented, although a larger fraction of geographically diverse sites experienced exceptional warmth during the late 20th century than during any other extended period from A.D. 900 onward. Based on the analyses presented in the original papers by Mann et al. and this newer supporting evidence, the committee finds it plausible that the Northern Hemisphere was warmer during the last few decades of the 20th century than during any comparable period over the preceding millennium.
    — NRC report

    And this debunks Mann how, exactly? This confirms Mann!

    Never trust a denier. They just don't read.

    If you don't stand for something, you'll stand for anything.

    by Keith Pickering on Mon Nov 22, 2010 at 07:41:38 AM PST

    [ Parent ]

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