Lewandowsky – Climate Scientists should be listened to because they are wrong

Stephen Lewandowsky has another couple of papers out. From e! Science News

Scientific uncertainty has been described as a ‘monster’ that prevents understanding and delays mitigative action in response to climate change. New research by Professor Stephan Lewandowsky of the University of Bristol, and international colleagues, shows that uncertainty should make us more rather than less concerned about climate change. In two companion papers, published today in Climatic Change, the researchers investigated the mathematics of uncertainty in the climate system and showed that increased scientific uncertainty necessitates even greater action to mitigate climate change.

The scientists used an ordinal approach — a range of mathematical methods that address the question: ‘What would the consequences be if uncertainty is even greater than we think it is?’


Professor Stephan Lewandowsky, Chair in Cognitive Psychology and member of the Cabot Institute at the University of Bristol, said: “We can understand the implications of uncertainty, and in the case of the climate system, it is very clear that greater uncertainty will make things even worse. This means that we can never say that there is too much uncertainty for us to act. If you appeal to uncertainty to make a policy decision the legitimate conclusion is to increase the urgency of mitigation.”

Co-author, Dr James Risbey of Australia’s CSIRO Marine and Atmospheric Research, said: “Some point to uncertainty as a way to minimize the climate change problem, when in fact it means that the problem is more likely to be worse than expected in the absence of that uncertainty. This result is robust to a range of assumptions and shows that uncertainty does not excuse inaction.”

If we assume that catastrophic climate change is a fundamental truth, the authors are right. The task of climate science is to reveal that truth to the world. If that truth cannot be accurately accessed, then the consequences of unmitigated climate change will be greater than if they could be. But if there is no fundamental truth to be revealed then all what you have is a number of dogmatic people who cannot accept that their theories are not backed by the evidence. The failure to understand the path to climate catastrophe might be due to no climate catastrophe in prospect. Persistent failures increase the likelihood that the belief in the fundamental truth of climate catastrophism is just a cult. Circumstantial evidence is in the unique methods and language of the “science”; moral certitude; failure to appreciate climate change could be a trivial problem; belief in their infallibility; reliance on belief in science, as opposed to accepting science that fails to be falsified; failure to recognize that those who disagree may also have valid viewpoint; and the denigration of anybody who asks questions as heretics deniers. Further, the solution is always the same, fitting in with an extremist socialist-environmentalist world view. There is no recognition that mitigation policies can fail. If mitigation can avert climate catastrophe it is a tautology to state that if mitigation is only practiced in a few minor emitting countries, those countries will bear all the cost of policies, and future generations will endure virtually all the consequences. The same is tautological truth applies if mitigation is practiced globally, but fails to reduce emissions.

The pay walled papers are here and here.

Kevin Marshall

Update :Jo Nova has a satirical take on the latest Lew papers.


Considering Uncertainty in Climate Science

Sir John Bedddington, provides the introduction to a summary of “The Science of Climate change” on  UK Business Department website. He states

            “The fact that uncertainty exists in climate science, as it does in other fields, does not negate the value of the evidence – and it is important to recognise that uncertainty may go in both (or a number of) directions.”

This may be true in a new field, but there is evidence that where the consensus is concerned, when assumptions have to be made, or choices made between different scientific conclusions, there has been a very strong bias towards the more alarmist conclusions. For instance,

  1. The emphasis on positive feedbacks;
  2. The over-statement of climate sensitivities;
  3. The promotion of the hockey stick as secondary verification of recent warming being largely due to anthropogenic factors.
  4. Further there has been a public relations failure to challenge unsound science, or wild predictions, or false confirmations.
  5. Neither have there been any consensus scientists standing up to emphasise that the model scenarios of future temperature changes are not forecasts

The consequence of recognising uncertainty means that an audit is required of the total picture. Each part of the science needs to be graded according to the certainties. Most certain is that a massive increase in greenhouse gases will, ceteris paribus, cause a rise in temperature. At the other extreme are predictions that within a generation the Arctic Ocean will be ice-free in summer, or the Himalayan glaciers will have vanished, or the Maldives will disappear beneath the waves. The rhetoric needs to be replaced by establishing the case on a scientific basis. It is not sufficient to say that there is uncertainty and move on as is nothing had happened. The presence of uncertainty severely weakens the claim that the science is established and settled. We should now see the consequences for policy.

Hattip to BishopHill