The Neo Paleo Twitter war of Mann -vs- D’Arrigo

It seems that Columbia’s Rosanne D’Arrigo thinks Mann’s tree ring study isn’t representative proxies for volcanic eruptions, nor good for dendrochronology, though Mike Mann seems to think so. This Twitter interchange via Alexandra Witze from the AGU Chapman Conference on Volcanism and the Atmosphere in Selfoss, Iceland 10–15 June 2012 tells the story: And Witze…

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Yamal that hurts! CRU gets touchy, responds to McIntyre and Montford without naming them

From the “he who must not be named” department, comes this sure to be future McI-fodder. UEA/CRU responds in a press release, authored by Tim Osborn, an excerpt: =========================================================== Tim Osborn comments on “Yamal, Polar Urals and Muir-Russell” Recent accusations (here, leading to embellishment across parts of the blogosphere, e.g. here) that the Climatic Research…

McIntyre rebuts Schmidt’s Rant on Yamal

By Steve McIntyre Two days ago, NASA blogger Gavin Schmidt posted an extended rant against me at Real Climate, a rant directed in part at my recent poston Yamal. I’ve now looked through his post carefully and, beneath Schmidt’s fulminations, did not find any rebuttal to any points actually made in my post, as I’ll…

Mann: Trees aren’t behaving like I want them to – volcanoes to blame

From Penn State Tree rings may underestimate climate response to volcanic eruptions Some climate cooling caused by past volcanic eruptions may not be evident in tree-ring reconstructions of temperature change because large enough temperature drops lead to greatly shortened or even absent growing seasons, according to climate researchers, who compared tree-ring temperature reconstructions with model…