Maurice Newman’s implication that discrepancies resulting from the recent climate fluctuation somehow invalidates climate models is incorrect.

It’s a well-kept secret, but 95% of the climate models we are told prove the link between human CO₂ emissions and catastrophic global warming have been found, after nearly two decades of temperature stasis, to be in error. It’s not surprising.” – Maurice Newman, AC, Chair of the Prime Minister’s Business Advisory Council, writing in The Australian newspaper, May 8, 2015.

Verdict

Mr Newman’s implication that discrepancies resulting from the recent climate fluctuation somehow invalidates climate models is incorrect.

Climate models have been thoroughly and critically tested against observations and are able to simulate with fair accuracy the component of climate change caused by human emissions of greenhouse gases and aerosols as well as natural factors like solar variations and volcanic eruptions.

However, long-term climate simulations do not and likely never will reproduce the timing of shorter-term random fluctuations, like the recent slowdown in surface temperatures. In the long run, this fluctuation, like many before, will just be noise on a gradually increasing temperature signal.

That the discrepancy is a “well-kept secret” is demonstrably false given the large number of scientific papers discussing and trying to explain exactly this issue.