Esperetal2014b

New Study: Two Thousand Years of Northern European Summer Temperatures Show a Downward Trend

In a paper published in the Journal of Quaternary Science, Esper et al. (2014) write that tree-ring chronologies of maximum latewood density (MXD) “are most suitable to reconstruct annually resolved summer temperature variations of the late Holocene.” And working with what they call “the world’s two longest MXD-based climate reconstructions” – those of Melvin et…

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Mann’s tree ring proxy train wreck

Eric Worrall writes: Mann’s thermometer spliced hockey stick has taken even more damage in the last few days, with Steve McIntyre helpfully providing reconstructions based on tree rings which demonstrate how, without the benefit of Mike’s scientifically dubious “nature trick”, the hockey stick simply disappears – tree rings demonstrably don’t correlate with temperature. According to…

Global climate change is shifting the odds in favor of trees in contrast to grasses, with the consequence that large parts of Africa’s savannas may well be forests by 2100. Copyright: Steve Higgins, used with permission

Claim: Greenhouse gases linked to past African rainfall

From UCAR/NCAR, something that seems like a wild claim to me, especially since all they have is proxy evidence (sediments) and model runs, not direct evidence. It is a stretch IMHO. Greenhouse gases linked to past African rainfall December 04, 2014 BOULDER — New research demonstrates for the first time that an increase in greenhouse…

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What would a +2°C warmer world look like?

An argument regularly advanced by alarmists is – can we afford to take the chance? This argument is often associated with a claim that a rise in global temperature greater than 2°C would be catastrophic – a theory backed by authoritative sounding computer simulations which suggest dangerous ocean acidification, deadly heat, and extreme weather. It…