New paper finds transient climate sensitivity to doubling of CO2 is about 1°C

A new paper published in Ecological Modelling finds climate sensitivity to doubled CO2 concentrations is significantly lower than estimates from the IPCC and climate models which “utilize uncertain historical data and make various assumptions about forcings.” The author instead uses a ‘minimal model’ with the fewest possible assumptions and least data uncertainty to derive a…

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Ross McKitrick’s presentation to FOS

The Friends of Science 11th annual luncheon was on May 13, 2014, featuring Dr. Ross McKitrick, at the Metropolitan Conference Centre, Calgary, Alberta. In it he says: “Climate models appear to overstate the effects of greenhouse gases.  This presentation will explain the problem and show why it undermines the assumptions behind carbon dioxide emission policies”.…

Climate Sensitivity and Transient Climate Response

Guest essay by Marcel Crok, Climate Dialogue Climate sensitivity is at the heart of the scientific debate on anthropogenic climate change. In the fifth assessment report of the IPCC (AR5) the different lines of evidence were combined to conclude that the Equilibrium Climate Sensitivity (ECS) is likely in the range from 1.5°C to 4.5°C. Unfortunately…

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…