From the GWPF: A recent paper published in Nature has received international media attention because of its claim that human-induced CO2 emissions caused global temperatures to start increasing around the 1830s, much earlier than generally accepted.
In a critical analysis of the paper by Abram et al. (2016) and published today at the influential Climate Audit blog, Nicholas Lewis, an independent climate researcher, demonstrates that the evidence that supports the claimed anthropogenic origin of the early warming onset is inappropriate and does not substantiate that claim.
Lewis said: “The authors’ claim that the start of anthropogenic warming can be dated to the 1830s flies in the face of the best estimates of the evolution of radiative forcing; those given in the IPCC 5th Assessment Report (AR5) show that anthropogenic forcing was only 0.01 W/m2 in 1840, and was still under 0.1 W/m2 in 1870. It is not…
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