Communicating Uncertainty about Climate Change: The Scientists’ Dilemma
Authors: Simpson Catherine 
Published: October 2020

Photograph by Gonzalo Echeverria (2010)We need to get some broad-based support, to capture the public’s imagination … so we have to offer up scary scenarios, make simplified, dramatic statements and make little mention of any doubts … each of us has to decide what the right balance is between being effective and being honest (Hulme 347). Acclaimed climate scientist, the late Stephen Schneider, made this comment in 1988. Later he regretted it and said that there are ways of using metaphors that can “convey both urgency and uncertainty” (Hulme 347). What Schneider encapsulates here is the great conundrum for those attempting to communicate climate change to the everyday public. How do scientists capture the public’s imagination and convey the desperation they feel about climate change, but do it ethically? If scientific findings are presented carefully, in boring technical jargon that few can understand, then they are unlikely to attract audiences or provide an impetus for behavioural change. “What can move someone to act?” asks communication theorists Susan Moser and Lisa Dilling (37). “If a red light blinks on in a cockpit” asks Donella Meadows, “should the pilot ignore it until in speaks in an unexcited tone? … Is there any way to say [it] sweetly? Patiently? If one did, would anyone pay attention?” (Moser and Dilling 37). In 2010 Tim Flannery was appointed Panasonic Chair in Environmental Sustainability at Macquarie University. His main teaching role remains within the new science communication programme. One of the first things Flannery was emphatic about was acquainting students with Karl Popper and the origin of the scientific method. “There is no truth in science”, he proclaimed in his first lecture to students “only theories, hypotheses and falsifiabilities”. In other words, science’s epistemological limits are framed such that, as Michael Lemonick argues, “a statement that cannot be proven false is generally not considered to be scientific” (n.p., my emphasis).  The impetus for the following paper emanates precisely from this issue of scientific uncertainty — more specifically from teaching a course with Tim Flannery called Communicating climate change to a highly motivated group of undergraduate science communication students. I attempt to illuminate how uncertainty is constructed differently by different groups and that the “public” does not necessarily interpret uncertainty in the same way the sciences do. This paper also analyses how doubt has been politicised and operates polemically in media coverage of climate change. As Andrew Gorman-Murray and Gordon Waitt highlight in an earlier issue of M/C Journal that focused on the climate-culture nexus, an understanding of the science alone is not adequate to deal with the cultural change necessary to address the challenges climate change brings (n.p). Far from being redundant in debates around climate change, the humanities have much to offer.  Erosion of Trust in Science The objectives of Macquarie’s science communication program are far more ambitious than it can ever hope to achieve. But this is not necessarily a bad thing. The initiative is a response to declining student numbers in maths and science programmes around the country and is designed to address the perceived lack of communication skills in science graduates that the Australian Council of Deans of Science identified in their 2001 report. According to Macquarie Vice Chancellor Steven Schwartz’s blog, a broader, and much more ambitious aim of the program is to “restore public trust in science and scientists in the face of widespread cynicism” (n.p.). In recent times the erosion of public trust in science was exacerbated through the theft of e-mails from East Anglia University’s Climate Research Unit and the so-called “climategate scandal” which ensued. With the illegal publication of the e-mails came claims against the Research Unit that climate experts had been manipulating scientific data to suit a pro-global warming agenda. Three inquiries later, all the scientists involved were cleared of any wrongdoing, however the damage had already been done. To the public, what this scandal revealed was a certain level of scientific hubris around the uncertainties of the science and an unwillingness to explain the nature of these uncertainties. The prevailing notion remained that the experts were keeping information from public scrutiny and not being totally honest with them, which at least in the short term, damaged the scientists’s credibility. Many argued that this signalled a shift in public opinion and media portrayal on the issue of climate change in late 2009. University of Sydney academic, Rod Tiffen, claimed in the Sydney Morning Herald that the climategate scandal was “one of the pivotal moments in changing the politics of climate change” (n.p). In Australia this had profound implications and meant that the bipartisan agreement on an emissions trading scheme (ETS) that had almost been reached, subsequently collapsed with (climate sceptic) Tony Abbott's defeat of (ETS advocate) Malcolm Turnbull to become opposition leader (Tiffen).  Not long after the reputation of science received this almighty blow, albeit unfairly, the federal government released a report in February 2010, Inspiring Australia – A national strategy for engagement with the sciences as part of the country’s innovation agenda. The report outlines a commitment from the Australian government and universities around the country to address the challenges of not only communicating science to the broader community but, in the process, renewing public trust and engagement in science. The report states that: in order to achieve a scientifically engaged Australia, it will be necessary to develop a culture where the sciences are recognized as relevant to everyday life … Our science institutions will be expected to share their knowledge and to help realize full social, economic, health and environmental benefits of scientific research and in return win ongoing public support. (xiv-xv) After launching the report, Innovation Minister Kim Carr went so far as to conflate “hope” with “science” and in the process elevate a discourse of technological determinism: “it’s time for all true friends of science to step up and defend its values and achievements” adding that, "when you denigrate science, you destroy hope” (n.p.).  Forever gone is our naïve post-war world when scientists were held in such high esteem that they could virtually use humans as guinea pigs to test out new wonder chemicals; such as organochlorines, of which DDT is the most widely known (Carson). Thanks to government-sponsored nuclear testing programs, if you were born in the 1950s, 1960s or early 1970s, your brain carries a permanent nuclear legacy (Flannery, Here On Earth 158). So surely, for the most part, questioning the authority and hubristic tendencies of science is a good thing. And I might add, it’s not just scientists who bear this critical burden, the same scepticism is directed towards journalists, politicians and academics alike – something that many cultural theorists have noted is characteristic of our contemporary postmodern world (Lyotard). So far from destroying hope, as the former Innovation Minister Kim Carr (now Minister for Innovation, Industry, Science and Research) suggests, surely we need to use the criticisms of science as a vehicle upon which to initiate hope and humility.  Different Ways of Knowing: Bayesian Beliefs and Matters of Concern At best, [science] produces a robust consensus based on a process of inquiry that allows for continued scrutiny, re-examination, and revision. (Oreskes 370) In an attempt to capitalise on the Macquarie Science Faculty’s expertise in climate science, I convened a course in second semester 2010 called SCOM201 Science, Media, Community: Communicating Climate Change, with invaluable assistance from Penny Wilson, Elaine Kelly and Liz Morgan. Mike Hulme’s provocative text, Why we disagree about climate change: Understanding controversy, inaction and opportunity provided an invaluable framework for the course. Hulme’s book brings other types of knowledge, beyond the scientific, to bear on our attitudes towards climate change. Climate change, he claims, has moved from being just a physical, scientific, and measurable phenomenon to becoming a social and cultural phenomenon. In order to understand the contested nature of climate change we need to acknowledge the dynamic and varied meanings climate has played in different cultures throughout history as well as the role that our own subjective attitudes and judgements play. Climate change has become a battleground between different ways of knowing, alternative visions of the future, competing ideas about what’s ethical and what’s not. Hulme makes the point that one of the reasons that we disagree about climate change is because we disagree about the role of science in today’s society. He encourages readers to use climate change as a tool to rigorously question the basis of our beliefs, assumptions and prejudices. Since uncertainty was the course’s raison d’etre, I was fortunate to have an extraordinary cohort of students who readily engaged with a course that forced them to confront their own epistemological limits — both personally and in a disciplinary sense. (See their blog: https://scom201.wordpress.com/). Science is often associated with objective realities. It thus tends to distinguish itself from the post-structuralist vein of critique that dominates much of the contemporary humanities. At the core of post-structuralism is scepticism about everyday, commonly accepted  “truths” or what some call “meta-narratives” as well as an acknowledgement of the role that subjectivity plays in the pursuit of knowledge (Lyotard). However if we can’t rely on objective truths or impartial facts then where does this leave us when it comes to generating policy or encouraging behavioural change around the issue of climate change?  Controversial philosophy of science scholar Bruno Latour sits squarely in the post-structuralist camp. In his 2004 article, “Why has critique run out of steam? From matters of fact to matters of concern”, he laments the way the right wing has managed to gain ground in the climate change debate through arguing that uncertainty and lack of proof is reason enough to deny demands for action. Or to use his turn-of-phrase, “dangerous extremists are using the very same argument of social construction to destroy hard-won evidence that could save our lives” (Latour n.p). Through co-opting (the Left’s dearly held notion of) scepticism and even calling themselves “climate sceptics”, they exploited doubt as a rationale for why we should do nothing about climate change.  Uncertainty is not only an important part of science, but also of the human condition. However, as sociologist Sheila Jasanoff explains in her Nature article, “Technologies of Humility”, uncertainty has become like a disease: Uncertainty has become a threat to collective action, the disease that knowledge must cure. It is the condition that poses cruel dilemmas for decision makers; that must be reduced at all costs; that is tamed with scenarios and assessments; and that feeds the frenzy for new knowledge, much of it scientific. (Jasanoff 33) If we move from talking about climate change as “a matter of fact” to “a matter of concern”, argues Bruno Latour, then we can start talking about useful ways to combat it, rather than talking about whether the science is “in” or not. Facts certainly matter, claims Latour, but they can’t give us the whole story, rather “they assemble with other ingredients to produce a matter of concern” (Potter and Oster 123). Emily Potter and Candice Oster suggest that climate change can’t be understood through either natural or cultural frames alone and, “unlike a matter of fact, matters of concern cannot be explained through a single point of view or discursive frame” (123). This makes a lot of what Hulme argues far more useful because it enables the debate to be taken to another level. Those of us with non-scientific expertise can centre debates around the kinds of societies we want, rather than being caught up in the scientific (un)certainties.  If we translate Latour’s concept of climate change being “a matter of concern” into the discourse of environmental management then what we come up with, I think, is the “precautionary principle”. In the YouTube clip, “Stephen Schneider vs Skeptics”, Schneider argues that when in doubt about the potential environmental impacts of climate change, we should always apply the precautionary principle. This principle emerged from the UN conference on Environment and Development in Rio de Janeiro in 1992 and concerns the management of scientific risk. However its origins are evident much earlier in documents such as the “Use of Pesticides” from US President’s Science Advisory Committee in 1962.  Unlike in criminal and other types of law where the burden of proof is on the prosecutor to show that the person charged is guilty of a particular offence, in environmental law the onus of proof is on the manufacturers to demonstrate the safety of their product. For instance, a pesticide should be restricted or disproved for use if there is “reasonable doubt” about its safety (Oreskes 374).  Principle 15 of the Rio Declaration on Environment and Development in 1992 has its foundations in the precautionary principle: “Where there are threats of serious or irreversible environmental damage, lack of full scientific certainty should not be used as a reason for postponing measures to prevent environmental degradation” (n.p). According to Environmental Law Online, the Rio declaration suggests that, “The precautionary principle applies where there is a ‘lack of full scientific certainty’ – that is, when science cannot say what consequences to expect, how grave they are, or how likely they are to occur” (n.p.). In order to make predictions about the likelihood of an event occurring, scientists employ a level of subjectivity, or need to “reveal their degree of belief that a prediction will turn out to be correct … [S]omething has to substitute for this lack of certainty” otherwise “the only alternative is to admit that absolutely nothing is known” (Hulme 85).  These statements of “subjective probabilities or beliefs” are called Bayesian, after eighteenth century English mathematician Sir Thomas Bayes who developed the theory of evidential probability. These “probabilities” are estimates, or in other words, subjective, informed judgements that draw upon evidence and experience about the likelihood of event occurring.  The Intergovernmental Panel on Climate Change (IPCC) uses Bayesian beliefs to determine the risk or likelihood of an event occurring. The IPCC provides the largest international scientific assessment of climate change and often adopts a consensus model where viewpoint reached by the majority of scientists is used to establish knowledge amongst an interdisciplinary community of scientists and then communicate it to the public (Hulme 88). According to the IPCC, this consensus is reached amongst more than more than 450 lead authors, more than 800 contributing authors, and 2500 scientific reviewers. While it is an advisory body and is not policy-prescriptive, the IPCC adopts particular linguistic conventions to indicate the probability of a statement being correct. Stephen Schneider convinced the IPCC to use this approach to systemise uncertainty (Lemonick).  So for instance, in the IPCC reports, the term “likely” denotes a chance of 66%-90% of the statement being correct, while “very likely” denotes more than a 90% chance. Note the change from the Third Assessment Report (2001), indicating that “most of the observed warming in over the last fifty years is likely to have been due to the increase in greenhouse gas emissions” to the Fourth Assessment (February 2007) which more strongly states: “Most of the observed increase in global average temperatures since the mid twentieth century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations” (Hulme 51, my italics).  A fiery attack on Tim Flannery by Andrew Bolt on Steve Price’s talkback radio show in June 2010 illustrates just how misunderstood scientific uncertainty is in the broader community. When Price introduces Flannery as former Australian of the Year, Bolt intercedes, claiming Flannery is “Alarmist of the Year”, then goes on to chastise Flannery for making various forecasts which didn’t eventuate, such as that Perth and Brisbane might run out of water by 2009. “How much are you to blame for the swing in sentiment, the retreat from global warming policy and rise of scepticism?” demands Bolt. In the context of the events of late 2009 and early 2010, the fact that these events didn’t materialise made Flannery, and others, seem unreliable. And what Bolt had to say on talkback radio, I suspect, resonated with a good proportion of its audience. What Bolt was trying to do was discredit Flannery’s scientific credentials and in the process erode trust in the expert. Flannery’s response was to claim that, what he said was that these events might eventuate. In much the same way that the climate sceptics have managed to co-opt scepticism and use it as a rationale for inaction on climate change, Andrew Bolt here either misunderstands basic scientific method or quite consciously misleads and manipulates the public. As Naomi Oreskes argues, “proof does not play the role in science that most people think it does (or should), and therefore it cannot play the role in policy that skeptics demand it should” (Oreskes 370).  Doubt and ‘Situated’ Hope  Uncertainty and ambiguity then emerge here as resources because they force us to confront those things we really want–not safety in some distant, contested future but justice and self-understanding now. (Sheila Jasanoff, cited in Hulme, back cover) In his last published book before his death in mid-2010, Science as a contact sport, Stephen Schneider’s advice to aspiring science communicators is that they should engage with the media “not at all, or a lot”. Climate scientist Ann Henderson-Sellers adds that there are very few scientists “who have the natural ability, and learn or cultivate the talents, of effective communication with and through the media” (430).  In order to attract the public’s attention, it was once commonplace for scientists to write editorials and exploit fear-provoking measures by including a “useful catastrophe or two” (Moser and Dilling 37). But are these tactics effective? Susanne Moser thinks not. She argues that “numerous studies show that … fear may change attitudes … but not necessarily increase active engagement or behaviour change” (Moser 70). Furthermore, risk psychologists argue that danger is always context specific (Hulme 196). If the risk or danger is “situated” and “tangible” (such as lead toxicity levels in children in Mt Isa from the Xstrata mine) then the public will engage with it. However if it is “un-situated” (distant, intangible and diffuse) like climate change, the audience is less likely to. In my SCOM201 class we examined the impact of two climate change-related campaigns. The first one was a short film used to promote the 2010 Copenhagen Climate Change Summit (“Scary”) and the second was the State Government of Victoria’s “You have the power: Save Energy” public awareness campaign (“You”). Using Moser’s article to guide them, students evaluated each campaign’s effectiveness. Their conclusions were that the “You have the power” campaign had far more impact because it a) had very clear objectives (to cut domestic power consumption) b) provided a very clear visualisation of carbon dioxide through the metaphor of black balloons wafting up into the atmosphere, c) gave viewers a sense of empowerment and hope through describing simple measures to cut power consumption and, d) used simple but effective metaphors to convey a world progressed beyond human control, such as household appliances robotically operating themselves in the absence of humans. Despite its high production values, in comparison, the Copenhagen Summit promotion was more than ineffective and bordered on propaganda. It actually turned viewers off with its whining, righteous appeal of, “please help the world”. Its message and objectives were ambiguous, it conveyed environmental catastrophe through hackneyed images, exploited children through a narrative based on fear and gave no real sense of hope or empowerment. In contrast the Victorian Government’s campaign focused on just one aspect of climate change that was made both tangible and situated.  Doubt and uncertainty are productive tools in the pursuit of knowledge. Whether it is scientific or otherwise, uncertainty will always be the motivation that “feeds the frenzy for new knowledge” (Jasanoff 33). Articulating the importance of Hulme’s book, Sheila Jasanoff indicates we should make doubt our friend, “Without downplaying its seriousness, Hulme demotes climate change from ultimate threat to constant companion, whose murmurs unlock in us the instinct for justice and equality” (Hulme back cover). The “murmurs” that Jasanoff gestures to here, I think, can also be articulated as hope. And it is in this discussion of climate change that doubt and hope sit side-by-side as bedfellows, mutually entangled.  Since the “failed” Copenhagen Summit, there has been a distinct shift in climate change discourse from “experts”. We have moved away from doom and gloom discourses and into the realm of what I shall call “situated” hope. “Situated” hope is not based on blind faith alone, but rather hope grounded in evidence, informed judgements and experience. For instance, in distinct contrast to his cautionary tale The Weather Makers: The History & Future Impact of Climate Change, Tim Flannery’s latest book, Here on Earth is a biography of our Earth; a planet that throughout its history has oscillated between Gaian and Medean impulses. However Flannery’s wonder about the natural world and our potential to mitigate the impacts of climate change is not founded on empty rhetoric but rather tempered by evidence; he presents a series of case studies where humanity has managed to come together for a global good. Whether it’s the 1987 Montreal ban on CFCs (chlorinated fluorocarbons) or the lesser-known 2001 Stockholm Convention on POP (Persistent Organic Pollutants), what Flannery envisions is an emerging global civilisation, a giant, intelligent super-organism glued together through social bonds. He says:  If that is ever achieved, the greatest transformation in the history of our planet would have occurred, for Earth would then be able to act as if it were as Francis Bacon put it all those centuries ago, ‘one entire, perfect living creature’. (Here on Earth, 279) While science might give us “our most reliable understanding of the natural world” (Oreskes 370), “situated” hope is the only productive and ethical currency we have. ReferencesAustralian Council of Deans of Science. What Did You Do with Your Science Degree?  A National Study of Employment Outcomes for Science Degree Holders 1990-2000. Melbourne: Centre for the Study of Higher Education, University of Melbourne, 2001.  Australian Government Department of Innovation, Industry, Science and Research, Inspiring Australia – A National Strategy for Engagement with the Sciences. Executive summary. 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