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March 27th 2011 print

Bob Carter

Climate Commission shirks debate

Australia’s Climate Commissioners are simply peddling long discredited arguments about global warming that have been made for 15 years by the IPCC, all of which are carefully crafted to demonize human CO2 emissions. Most of these arguments carry a political overtone, and most are espoused also by Australia’s current government.


The Climate Commission: science communication is what it’s all about


Last Friday night, five of Australia’s six Climate Commissioners participated in the Commission’s first public consultation meeting in Geelong. They were Tim Flannery, Will Steffen, Lesley Hughes (all scientists), Roger Beale (environmental policy analyst) and Gerry Hueston (businessman); Commissioner Susannah Elliott (science communication) was not in attendance.

Australia already has an expensive federal Ministry of Climate Change, so why do we also need a new Climate Commission? Good question.

The terms of reference of the Climate Commission are to:

  • Explain the science of climate change and the impacts on Australia.
     
  • Report on the progress of international action dealing with climate change.
     
  • Explain the purpose and operation of a carbon price and how it may interact with the Australian economy and communities.

Interestingly, only one of these terms of reference concerns science. Of course, if there is no science problem then by definition there is no economic or political problem. So the inclusion of two economic and political terms of reference indicates that the government’s view is that “the science is settled” – which won’t surprise anyone.

Similarly unsurprising, but nonetheless disappointing, is that all five of the Commissioners who attended the Geelong meeting manifested an alarmist view of global warming and its speculated human cause – industrial carbon dioxide emissions — rather than presenting as even-handed dispensers of scientific and technical truth.

The scientific background to the Geelong meeting is this. Within the bounds of error, average global temperature hasn’t increased since 1995 (15 years) and temperature has actually been falling slightly since 2001 (10 years). Meanwhile, over the last ten years atmospheric carbon dioxide levels have increased by 5%.

The conclusion is obvious. More carbon dioxide is not causing dangerous warming. Indeed, and despite it being an undoubted greenhouse gas, carbon dioxide emissions are not currently producing any measurable (as opposed to theoretical) warming at all.

There thus being no established scientific problem, about half of what the Climate Commissioners had to say in Geelong (about carbon dioxide taxes and related industry, employment and social issues) can be put aside – for it concerned non-solutions to a non-problem in aid of which has been proposed a non-justifiable new tax.

This leaves as the key issue the matter of what the Commissioners had to say about the scientific evidence for dangerous global warming. Perhaps they were going to share with us some new evidence or insights?

No such luck. What the audience got instead was a mish-mash of misinformation, much of it derived from the United Nations’ Intergovernmental Panel on Climate Change (IPCC), and discussion of which signally failed to distinguish between the undoubtedly real problems associated with natural climate change and the hypothetical problems that might or might not result from human-caused warming – should such ever manifest itself.

To begin with, the Commissioners consistent use of the word “carbon” when “carbon dioxide” was meant, and “climate change” when “dangerous global warming caused by human-carbon dioxide emissions” was meant, indicated the degree to which their views are aligned with the Greens’ carefully honed propaganda view of the world. Using this type of prejudicial language in any discussion on global warming is a litmus test for a lack of balance and perspective by the perpetrators.

Here is a small selection of some of the other incorrect technical statements, and their implications, that were made by the commissioners.


Assertion: Human-caused global warming is continuing, and we are in danger of seeing it augmented by positive feedback loops.

Reality: There is no direct evidence that the mild warming that occurred between 1979 and 1998 was mostly, or even measurably, a result of human carbon dioxide emissions, despite the pseudo-scientific assertion to that effect by the IPCC.

Second, there has been no global warming at all for the last 15 years despite the operation throughout of the self-same feedback loops.


Assertion: Industrial carbon dioxide emissions are currently ~300 billion tonnes annually and they need to be limited to ~700 billion tonnes in future to stabilize the temperature at no more than 2 deg. C above the pre-industrial temperature.

Reality: There is no evidence that a 2 deg. C warming (which would take the planet back to about the temperature levels of the Climatic Optimum that occurred about 10,000 years ago) would be damaging for the environment, or for human activities in any substantial way that we couldn’t adapt to.

And, even should natural global warming resume in the future, as it very well may as part of a continuing bounce back from the hostile conditions of the Little Ice Age, there is no certainty that restricting carbon dioxide emissions will do anything to halt the rise. First, because of the diminishing warming effectiveness of every increment of carbon dioxide that is added to the atmosphere, and second because the assumed efficacy of limiting emissions to 700 billion tonnes is a projection of computer models that are known to be faulty.


Assertion: We live today during a long, stable period of climate with no expectable change for the next 20-30 thousand years, and we are now seeing a temperature increase above that due to human carbon dioxide emissions.

Reality: There are three things wrong with this statement. First, the stable period referred to is called the Holocene. The Holocene has already lasted 10,000 years, during which time (i) a long term cooling of 1-2 deg. C has occurred; and (ii) regular temperature oscillations of about 1 deg. C have occurred on multidecadal and centennial time scales, the last of which occurred during the 20th century.

Second, the average length of recent warm interglacials similar to the Holocene is about 10,000 years, implying we are near the end of the climatic optimum that has so favoured the development of human societies. [An alternative view is that of all the recent interglacial periods, the Earth’s current orbital geometry (which is what controls the glacial and interglacial cycles) is most similar to that of an interglacial that occurred about 400,000 years ago, and which lasted for the unusually long period of 20,000 years. The suggestion that therefore the Holocene might similarly continue for 20,000 years or more is a valid scientific debating point, but nowhere near to the certainty that it was presented as.]

Third, we are not seeing any increase in temperature above the long-term Holocene average at the moment, and there is no empirical evidence that the mild warming of the late 20th century had a dominantly human causation.


Assertion: The scientific community is more than 90% sure that we are not seeing a natural warming at the moment; this is as strong a consensus as you will ever get.

Reality: The scientists amongst the Commissioners clearly mix in a different scientific community to the one that I inhabit. I believe that the community that they refer to is the restricted group of scientists who are associated with the IPCC. It is indeed true that the majority of IPCC scientists are convinced that dangerous global warming is occurring, or will occur, and therein lies the problem.

For IPCC scientists hold this belief fiercely at the same time that an intense debate is raging in the wider scientific community, most members of which have a much more balanced, middleground view that goes something like:

Yes, natural climate change and events are definitely an environmental and socio-political hazard, and yes we should prepare better for them and adapt better to them when they occur.

Such a commonsense policy is, of course, not only cost-effective, but is also precautionary against any human-caused change that might occur in the future – but which has not been manifest yet.

Second, and as has been said so many times before, consensus is a political concept that has nothing to do with science. For were the Commissioners to tell us is that there is a scientific consensus that the sun will rise tomorrow, everyone would wonder what was wrong with them that they should choose such peculiar, deliberately non-scientific, language.


Assertion: We do not hear a debate in the scientific community between IPCC-supporting scientists and other, independent scientists because no such debate exists. “There is no debate and there has been no debate for a couple of decades”.

Reality: That credentialed scientists can make statements like this on a public platform is extraordinary. The statement is, of course, false, and reveals far more about its author than it does about the real state of scientific discussion regarding climate change.


Assertion: The Melbourne heat wave in 2009 set a temperature record that was 3 deg. C higher than previously. Similar temperatures will be everyday events by the end of this century. 

Reality: This is typical of the sort of nonsensical alarmist statements that are made by persons possessed of a naïve faith that computer models can make predictions about future climate states. They cannot, as even the modelling practitioners themselves concede.

The computer model that yielded the speculative projection regarding future hot days in Victoria was doubtless derived from the same organisation that includes the following disclaimer at the front of all its computer modelling consultancy reports:

This report relates to climate change scenarios based on computer modelling. Models involve simplifications of the real processes that are not fully understood.

Accordingly, no responsibility will be accepted by CSIRO or the QLD government for the accuracy of forecasts or predictions inferred from this report or for any person’s interpretations, deductions, conclusions or actions in reliance on this report.

Did you get that?


Assertion: The Great Barrier Reef has experienced about 7-10 bleaching events since 1979. No bleaching events are known before this, and the events result when the ocean temperature SST rises about 1 deg. above the summer long term temperature. If we keep going, the reef will bleach every year by 2030. 

Reality: Bleaching events on coral reefs are caused less by regional ocean warming per se than they are by the localised warming that occurs in areas and times of low wind conditions.

Bleaching events have been reported since 1979 because it is only after that date that a network of scientific observers was established on the reef. There is no evidence that any of these events was due to human activity, and to suggest that no similar natural events occurred before 1979 is silly.

In any case, the sea surface temperature of the Great Barrier Reef shows no change over the last 30 years, and the speculation that the reef will bleach every year by 2030 doubtless represents the projection of another of those legendary, and legendarily wrong, computer models.


In his introductory remarks to the Geelong meeting, Commission Chairman Tim Flannery stressed that his commission was independent from government direction, and was “determined not to deliver political spin”. Professor Flannery added that Australia “needs a clear, level-headed debate on the core issues” of the global warming matter.

Using those statements as criteria, how well did the Commission’s performance at Geelong stack up? Readers have probably instantly judged the answer to that question for themselves, but here’s my take.

First, and remembering that THE core issue is the scientific evidence regarding global warming, while Professor Flannery may want a clear debate, some of his commissioners deny that any debate exists, or has for 20 years; collectively, their attitudes also seem aimed at continuing to prevent one. Second, most of the examples of commissioners’ arguments discussed above may not represent “political spin” but they most certainly represent “scientific spin” of the most egregious type.

In essence, Australia’s new Climate Commissioners are simply peddling long discredited arguments about global warming that have been made for 15 years by the IPCC, all of which are carefully crafted to demonize human carbon dioxide emissions. Most of these arguments carry a political overtone, and most are espoused also by Australia’s current government, which makes it a little difficult to see how Professor Flannery is going to be able to exercise his Commission’s claimed independence.

Alarmingly, during all the questions and answers at Geelong, the Commissioners showed no sign of familiarity with the corpus of literature that is critical of the IPCC and of the conclusions of its scientists. And nor do they have amongst their ranks a credentialled independent scientist who could encourage them to focus on empirical evidence rather than computer model outputs, and to distinguish at all times between real natural and speculative human-caused climate-related environmental change.

Science communications expert, Commissioner Susannah Elliott, was not in attendance at the Geelong meeting, but she surely has some work to do with her fellow commissioners to help them lift their game.

The public wants to hear straight answers to straight questions about global warming science, rather than being on the receiving end in a game of climate frisbee-science. Isn’t the former what science communications is all about, and what the Climate Commission was set up for in the first place?

Professor Bob Carter is a geologist, environmental scientist and Emeritus Fellow at the Institute of Public Affairs.