Dean Swift’s foresight – Energy in the 21st century - Guest essay by William York None of these projects are yet brought to perfection The chaos surrounding the management of this nation’s electricity supply h...
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The Nature editorial states: “Nothing in the e-mails undermines the scientific case that global warming is real — or that human activities are almost certainly the cause. That case is supported by multiple, robust lines of evidence, including several that are completely independent of the climate reconstructions debated in the e-mails.” It then mentions the usual symptoms: “glacier retreat, thinning and areal reduction of Arctic sea ice, reductions in permafrost and accelerated loss of mass from the Greenland and Antarctic ice sheets … the global sea level is rising … spring is arriving earlier each year.”
So where are the “robust lines of evidence” for causation?
“Denialists often maintain that these changes are just a symptom of natural climate variability. But when climate modellers test this assertion by running their simulations with greenhouse gases such as carbon dioxide held fixed, the results bear little resemblance to the observed warming. The strong implication is that increased greenhouse-gas emissions have played an important part in recent warming, meaning that curbing the world's voracious appetite for carbon is essential”.
That’s it – running model simulations. That’s all there is. No real evidence. The models don’t work without CO2. Just curb your appetite. If there was actual empirical evidence of CO2 causation they would have mentioned it.