New paper finds transient climate sensitivity to CO2 is ~35% less than IPCC claims

From The Hockey Schtick: A paper under discussion for Earth System Dynamics finds the transient climate response [TCR] to CO2 is 1.3°C per doubling of CO2 levels, about 35% less than claimed by the IPCC mean estimate and the same as determined by another recent paper by Otto et al finding a TCR of 1.3°C.  The…

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New paper finds climate sensitivity to CO2 is lower than previously believed, strong natural variability in Southern Hemisphere

(NOTE: I’m traveling today, and thus I’m posting this article from The Hockey Schtick as it deserves attention and discussion. At 10AM EDT, an announcement about a new skeptic publication in Nature Climate Change  will follow this article – Anthony) A commentary published April 25th in Nature Climate Change concludes on the basis of a…

Ridley: IPCC & OECD reports are telling us clear as a bell that we cannot ruin the climate with CO2 unless we have a population explosion

Matt Ridley: The Richer We Get, The Greener We’ll Become The world’s climate change experts are now saying that strong growth doesn’t hurt the environment, it protects it Matt Ridley, The Times In the past 50 years, world per capita income roughly trebled in real terms, corrected for inflation. If it continues at this rate…

Can we deduce climate sensitivity from temperature?

By Christopher Monckton of Brenchley Central to Professor Lovejoy’s paper attempting to determine climate sensitivity from recent temperature trends is the notion that in any 125-year period uninfluenced by anthropogenic forcings there is only a 10% probability of a global temperature trend greater than +0.25 K or less than –0.25 K. Like most of the…

When will climate feedbacks fully function? Not for millennia

 Guest essay by Christopher Monckton of Brencheley The splendidly-titled Alberto Zaragoza Comendador, commenting on my recent posting taking apart Mr. Mann’s latest fantasia in Scientific American, was startled by my statement that only half of equilibrium global warming would emerge after a couple of hundred years, because – “Equilibrium climate sensitivity is a measure of…