Marcott’s uptick – a result of proxy sign inconsistency

Shades of upside down Tiljander. McIntyre is delving further into the Marcott proxy issue and it looks almost certain now there’s a statistical processing error (selection bias). Steve McIntyre writes: In the graphic below, I’ve plotted Marcott’s NHX reconstruction against an emulation (weighting by latitude and gridcell as described in script) using proxies with published…

Tick, tick, tick – how long will the new Marcott et al hockey stick survive?

Steve McIntyre writes of the curious uptick in the 20th century, which doesn’t seem to be rooted in reality, or to have been in Marcott’s PhD thesis: While one expects a difference between NHX and SHX in the Holocene, the remarkable difference between NHX and SHX not just in the 20th century, but in the…

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Another Hockey Stick?

Guest post by S. Fred Singer Green forces, eager to promote their theories of global warming, appear to be practicing intellectual recycling.  Is this the return of the notorious hockeystick – which, in 2001, was the central dogma of Anthropogenic Global Warming (AGW) believers? This quasi-religious faith in catastrophic AGW still remains a prerequisite for…

Marcott’s proxies – 10% fail their own criteria for inclusion

Note: Steve McIntyre is also quite baffled by the Marcott et al paper, finding it currently unreproducible given the current information available. I’ve added some comments from him at the bottom of this post – Anthony Guest Post by Willis Eschenbach I don’t know what it is about proxies that makes normal scientists lose their…