By Reinhard Mechler, Deputy Program Director, IIASA Risk and Resilience Program
IPCC Special Report on Global Warming of 1.5°C
The Intergovernmental Panel on Climate Change (IPCC) just approved its Special Report on Global Warming of 1.5°C (SR15). It took long hours of discussions between the body of authors and representatives from about 130 IPCC member states gathered at the approval session in Korea, to get the highly anticipated report accepted. The report was requested by parties to the United Nations Framework Convention on Climate Change (UNFCCC) as set out in the Paris Agreement in 2015, that urged parties to limit warming to “well below” 2°C and pursue efforts towards 1.5°C of warming above pre-industrial levels. Countries that are severely vulnerable to climate change such as small-island states, expressed a particular need for the report. The drafted text of the summary for policymakers (SPM) remained largely intact throughout the approval session and the science was well respected by the parties (as has generally been the case for the IPCC). This bodes well for the IPCC’s process of reporting the most up to date information on climate science to national and international decision makers who closely review and comment on drafts of texts throughout the writing process.
The report, composed of five chapters and the SPM, discusses among other topics whether the Paris target of 1.5°C above pre-industrial temperature is still achievable; what the risks we face are at 1.5°C and 2°C of warming; what this will mean in terms of mitigation and adaptation; and what the synergies are between mitigation, adaptation and the Sustainable Development Goals (SDGs).
Below my take on how the SR15 answers some of these questions:
A stark warning… and indeed half a degree does make a difference
The world is on its way to breaching 1.5°C by around the 2040s, which will lead to further warming if current greenhouse gas emissions trends prevail and current nationally determined contributions (NDCs) are not upgraded. Warming can still be stabilized at 1.5°C, but it is an ambitious target that depends on halving emissions over the next 10 years and becoming carbon-neutral by 2050.
The report shows that we are already seeing serious consequences of a 1°C warming in the form of significant increases in some weather-related extreme events (such as the frequency, intensity, and/or amount of heavy precipitation in several regions), exacerbated sea level rise, and other effects on important terrestrial and oceanic systems. In terms of future warming, the report shows that a half-degree change, which we have actually seen over the last 50 years, indeed makes a difference. Risks will be higher than today at 1.5°C and will further increase at 2°C (and beyond).
Adaptation and its limits: A need for transformation?
In light of the above, adaptation is essential and needs to be ramped up. However, for the first time, the IPCC presents evidence on hard and soft limits to adaptation, of which some would already be reached at 1.5°C. Statement B6 of the SPM reads: “Most adaptation needs will be lower for global warming of 1.5°C compared to 2°C (high confidence). There are a wide range of adaptation options that can reduce the risks of climate change (high confidence). There are limits to adaptation and adaptive capacity for some human and natural systems at global warming of 1.5°C, with associated losses (medium confidence).”
So, what should we do in terms of adaptation in light of pervasive risks becoming increasingly severe and ultimately breaching adaptation limits? Statement A3.3 of the SPM suggests that, “Future climate-related risks would be reduced by the upscaling and acceleration of far-reaching, multi-level, and cross sectoral climate mitigation and by both incremental and transformational adaptation (high confidence).”
Throughout the document, the SR15 discusses what is needed in terms of standard adaptation (incremental) and transformational adaptation. An example of incremental adaptation is to continue building sea walls to manage increasing flooding from sea level rise. Adapting community and regional planning so that people, key assets, and buildings are moved out of harm’s way on the other hand, would be rather transformational–and often have a holistic and systemic component. The report also shows that more effort will be needed to better understand what transformational risk management processes may entail concretely.
Transformation: What does it take?
Transformational adaptation may not always be needed uniformly across the globe, but as the report shows, communities in regions vulnerable to sea-level rise risk, flooding, heat, and drought already clearly need significant support, and in a 1.5°C or 2°C world, much more would be needed. The report also shows that increasing investment in physical and social infrastructure is a key enabler of necessary transformations that enhance the resilience of communities and societies. Upgrading climate adaptation efforts will be fundamental to absorbing some climate change impacts and not critically affecting the achievement of the SDGs. What is more, the SR15 points out that the coordinated pursuit of climate resilience and development is the way forward to achieving the ambitious mitigation and adaptation targets set out, while seeking achievement of development goals such as those formulated in the 17 SGDSs.
Among others, three main implications for adaption (and climate risk) science, policy, and practice can be drawn:
Climate-related risks are becoming pervasive and significant with climatic change: The Paris call for limiting warming to 1.5°C should be heeded and remain the target for ambitious climate mitigation policy in order to avoid some risks from becoming irreversible and hard adaptation limits manifesting themselves.
Climate-related risks are becoming pervasive due to gaps in human, physical, financial, natural, and social capacity/capitals, and increased and targeted investments to strengthen these will be needed to push soft adaptation limits out.
Systemic approaches are needed to tackle high-level risks and consider synergies between adaptation, mitigation, and the SDGs as standard adaptation and disaster risk reduction may not be enough. Transformational approaches requiring large-scale and systemic change are useful in this regard.
The open question…
The final, open question for all of us is of course whether the report can be more than another wake-up call and truly be a game-changer for limiting warming to 1.5°C while ramping up adaptation efforts. The science is there. Broad-based dissemination efforts with policymakers and advisors, experts, the private sector, and civil society are being rolled out. The political will to live up to the massive mitigation and adaptation challenges needs to follow now. Little time remains, and if we truly want to limit warming to 1.5°C and mitigate the associated risks, we need to take decisive and bold steps towards carbon-neutrality and climate-resilience now.
Note: This article gives the views of the author, and not the position of the Nexus blog, nor of the International Institute for Applied Systems Analysis.
By Sandra Ortellado, IIASA 2018 Science Communication Fellow
If fashion is the science of appearances, what can beauty and aesthetics tell us about the way we perceive the world, and how it influences us in turn?
From cognitive science research, we know that aesthetics not only influence superficial appearances, but also the deeper ways we think and experience. So, too, do all kinds of creative thinking create change in the same way: as our perceptions of the world around us changes, the world we create changes with them.
From the merchandizing shelves of H&M and Vero Moda to doctoral research at the Faculty of Information Technology at the University of Jyväskylä, Finland, 2018 YSSP participant Laura Mononen has seen product delivery from all angles. Whether dealing with commercialized goods or intellectual knowledge, Mononen knows that creativity is all about a change in thinking, and changing thinking is all about product delivery.
“During my career in the fashion and clothing industry, I saw the different levels of production when we sent designs to factories, received clothing back, and then persuaded customers to buy them. It was all happening very effectively,” says Mononen.
But Mononen saw potential for product delivery beyond selling people things they don’t need. She wanted to transfer the efficiency of the fashion world in creating changes in thinking to the efforts to build a sustainable world.
“Entrepreneurs make change with products and companies, fashion change trends and sell them. I’m really interested in applying this kind of change to science policy and communication,” says Mononen. “We treat these fields as though they are completely different, but the thing that is common is humans and their thinking and behaving.”
Often, change must happen in our thinking first before we can act. That’s why Mononen is getting her doctorate in cognitive science. Her YSSP project involved heavy analysis of systems theories of creativity to find patterns in the way we think about creativity, which has been constantly changing over time.
In the past, creativity was seen as an ability that was characteristic of only certain very gifted individuals. The research focused on traits and psychological factors. Today, the thinking on creativity has shifted towards a more holistic view, incorporating interactions and relationships between larger systems. Instead of being viewed as a lightning bolt of inspiration, creativity is now seen as more of a gradual process.
New understandings of creativity also call on us to embrace paradoxes and chaos, see ourselves as part of nature rather than separate from it, experience the world through aesthetics, pay careful attention to our perception and how we communicate it, and transmit culture to the next generation.
Perhaps most importantly, Mononen found in her research that the understanding of creativity has changed to be seen as part of a process of self-creation as well as co-creation.
“The way we see creativity also influences ourselves. For example if I ask someone if they are creative, it’s the way they see themselves that influences how creative they are,” says Mononen. “I have found that it’s more crucial to us than I thought, creativity is everywhere and it’s everyday and we are sharing our creativity with others who are using that to do something themselves and so on.”
This means on the one hand that we use our creativity to decide who we are and how we see the world around us for ourselves. But it also means that the outcomes and benefits of creativity are now intended for society as a whole rather than purely for individuals, as it was in the past. It may sound like another paradox, but being able to embrace ambiguity and complexity and take charge of our role in a larger system is important for creating a sustainable future.
“From the IIASA perspective this finding brings hope because the more people see themselves as part of systems of creating things, the more we can encourage sustainable thinking, since nature is a part of the resources we use to create,” says Mononen.
Mononen says a systems understanding of creativity is especially important for people in leadership positions. If a large institution needs new and innovative solutions and technology, but doesn’t have the thinking that values and promotes creativity, then the cooperative, open-minded process of building is stifled.
Working in both the fashion industry and academic research, Mononen has encountered narrow-minded attitudes towards art and science firsthand.
“Communicating your research is very difficult coming from my background, because you don’t know how the other person is interpreting what you say,” says Mononen. “People have different ideas of what fashion and aesthetics are, how important they are and what they do. Additionally, scientific concepts are used differently in different fields.”
“We are often thinking that once we get information out there, then people will understand, but there are much more complex things going on to make change and create influence in settings that combine several different fields.” says Mononen.
For Mononen, the biggest lesson is that creativity can enhance the efforts of science towards a sustainable world simply by encouraging us to be aware of our own thinking, how it differs from that of others, and how it affects all of us.
“When you become more aware of your ways of thinking, you become more effective at communicating,” says Mononen. “It’s not always that way and it’s very challenging, but that’s what the research on creativity from a systems perspective is saying.”
By Marcus Thomson, researcher, IIASA Ecosystems Services and Management Program
While living in Cairo in 2010, I witnessed first-hand the human toll of political and environmental disasters that washed over Africa at the end of the last century. Unprecedented numbers of migrants were pressing into North Africa, many pushed out of their homelands by conflict and state-failure, pulled towards safer, richer, less fragile places like Europe. Throughout Sub-Saharan Africa, climate change was driving up competition for scarce land and water, and raising pressure on farmers to maintain the quantity and quality of their crops.
It is a similar story throughout the developing world, where many farmers do without the use of expensive chemical fertilizer and pesticides, complex irrigation, or boutique seed varieties. They rely instead on traditional land management practices that developed over long periods with consistent, predictable conditions. It is difficult to predict how dryland farmers will respond to climate change; so it is challenging to plan for various social, economic, and political problems expected to develop under, or be exacerbated by, climate change. Will it spur innovation or, as has been argued for the Syrian civil war, set up conflict? A major stumbling block is that the dynamics of human social behavior are so difficult to model.
Instead of attempting to predict farmers’ responses to climate change by modelling human behavior, we can look to the responses to environmental changes of farmers from the past as analogues for many subsistence farmers of the future. Methods to fill in historical gaps, and reconstruct the prehistoric record, are valuable because they expand the set of observed cases of societal-scale responses to environmental change. For instance, some 2000 years ago, an expansive maize-growing cultural complex, the Ancestral Puebloans (APs), was well established in the arid American Southwest. By AD 1000, members of this AP complex produced unique and innovative material culture including the famed “Great Houses”, the largest built structures in the United States until the 19th century. However, between AD 1150 and 1350, there was a profound demographic transformation throughout the Southwest linked to climate change. We now know that many APs migrated elsewhere. As a PhD student at the University of California, Los Angeles, I wondered whether a shift to cooler, more variable conditions of the “Little Ice Age” (LIA, roughly AD 1300 to 1850) was linked to the production of their staple crop, maize.
I came to IIASA as a YSSP in 2016 to collaborate with crop modelers on this question, and our work has just been published in the journal Quaternary International. I brought with me high-resolution data from a state-of-the-art climate model to drive the crop simulations, and AP site information collected by archaeologists. Because AP maize was quite different from modern corn, I worked with IIASA soil scientist Juraj Balkovič to modify the crop simulator with parameters derived from heirloom varieties still grown by indigenous peoples in the Southwest. I and IIASA economic geographer Tamás Krisztin developed a statistical technique to analyze the dynamical relationship between AP site occupation and simulated yield outcomes.
We found that for the most climate-stressed high-elevation sites, abandonments were most associated with increased year-to-year yield variability; and for the least stressed low-elevation and well-watered sites, abandonment was more likely due to endogenous stressors, such as soil degradation and population pressure. Crucially, we found that across all regions, populations peaked during periods of the most stable year-to-year crop yields, even though these were also relatively warm and dry periods. In short, we found that AP maize farmers adapted well to gradually rising temperatures and drought, during the MCA, but failed to adapt to increased climate variability after ~AD 1150, during the LIA. Because increased variability is one of the near certainties for dryland farming zones under global warming, the AP experience offers a cautionary example of the limits of low-technology adaptation to climate change, a business-as-usual direction for many sub-Saharan dryland farmers.
This is a lesson from the past that policymakers might take note of.
 Kelley, C. P., Mohtadi, S., Cane, M. A., Seager, R., & Kushnir, Y. (2015). Climate change in the Fertile Crescent and implications of the recent Syrian drought. Proceedings of the National Academy of Sciences, 201421533.
 Thomson, M. J., Balkovič, J., Krisztin, T., MacDonald, G. M. (2018). Simulated crop yield for Zea mays for Fremont Ancestral Puebloan sites in Utah between 850-1499 CE based on temperature dailies from a statistically downscaled climate model. Quaternary International. https://doi.org/10.1016/j.quaint.2018.09.031
by Melina Filzinger, IIASA Science Communication Fellow
Yuping Bai is a participant of the IIASA Young Scientists Summer Program (YSSP) and a first year PhD candidate at the Chinese Academy of Sciences’ Institute of Geographic Sciences and Natural Resources Research. She is working with the Intergovernmental Panel on Climate Change (IPCC), the leading international body for the assessment of climate change, as a chapter scientist for their Special Report on Climate Change and Land. I recently had the chance to talk to her about her engagement as a chapter scientist.
What is the aim of the IPCC special report on climate change and land?
Compared to the IPCC comprehensive assessment reports, this special report really focuses in depth on the linkages and inter-relationship between climate change, land use, and food security. It aims to propose sustainable land-based solutions towards climate change mitigation and adaptation efforts. We all know that climate change is an important issue and the connections between climate change and land use change are extremely complex. The report will include many different topics like land degradation, desertification, greenhouse gas fluxes and food security. Understanding the links between these diverse issues is particularly important for informing decision making by governments, as well as private sectors, to address challenges in land use change and governance.
What is a chapter scientist?
Chapter scientists are early-career researchers that support the development process of the individual report chapters. IPCC asked for volunteers who are required to dedicate at least one-third full time equivalent over a 2.5-year period while working from their home institutions. The chapter scientists were chosen based on expertise, motivation, time availability, and experience in working in a multi-cultural context. There are ten chapter scientists in total working on the report, one or two for each chapter.
How do you contribute to the report?
I am assigned to Chapter 1, which provides the framing and context for the report. Part of my job has been organizational tasks, for example managing our referencing system, scheduling online meetings, tracking down key literature, assisting in the design and development of figures and tables, and assisting in compiling, revising, and organizing chapter contributions. On the other hand, I have also been involved in developing the overall concept of our chapter and can voice my ideas and express my views. Chapter 1 raises the key issues related to land use and sustainable land management for climate adaptation and climate resilience, and provides the concepts and definitions needed to understand the rest of the report.
In fact, many of these topics are closely related to my PhD research and my YSSP project. The YSSP experience significantly broadened my knowledge on climate change and land related topics, and at the same time deepened my understanding of the cross-scale complexity of the issues. After three months, I feel that I’m much better equipped to contribute to the future work for the chapter.
Why did you decide to volunteer so much of your time?
As a chapter scientist I have the chance to participate in discussions on some of the most pressing and important issues in the world. I also have the unique possibility to work with some of the world leading scientists in their respective fields. Therefore, I think it’s an important opportunity to make contacts and to gain insight into the work of the IPCC.
What has your experience been so far?
I’m the youngest one of the chapter scientists, so I felt a bit overwhelmed at first, particularly as I was suddenly rubbing shoulders with some of the brightest, most established academics and researchers on the planet. In this first half year, I attended the second lead author meeting and have been involved in the first draft of the report. During busy periods leading up to key deadlines, such as the submission of the drafts, my hours peaked, and the pressure built. But don’t let this frighten you. It is possible to learn on the job! It helped that everyone made me feel so welcome and valued. I have definitely learned a lot. My research is very specialized, and my work with the IPCC has helped me gain a broader view on climate change and the problems that are connected to it.
Note: This article gives the views of the author, and not the position of the Nexus blog, nor of the International Institute for Applied Systems Analysis.
By Sandra Ortellado, 2018 Science Communication Fellow
Around 8,000 kilometers away from Vienna, Austria, hundreds of Arctic coastal communities are at imminent risk from the melting ice and coastal erosion. Indigenous Arctic populations struggle with food insecurity every day, living off small fractions of what their catch would have been only a few years ago. Their culture and their way of life, so dependent on sea ice conditions, are melting away, along with the very root of the Arctic ecosystem.
However, construal level theory, a social psychological theory that describes the extent to which distant things become abstract concepts, tells us that 8,000 kilometers is just far enough for Arctic peoples to lose tangible existence in the minds of urban citizens. Unlike Arctic communities, who experience the direct effects of climate change at each meal, commercialized lower latitude societies don’t have to face the environmental consequences of choosing to drive to the grocery store instead of bike.
Nevertheless, those consequences are very real, even if the impacts on the Arctic and climate system don’t always catch our attention. Sea level will continue to rise for the next several hundred years—it takes 500 years for the deep ocean to adjust to changes at the surface.
On Friday, 22 July, former Chief Scientist of the UK Met Office Dame Julia Slingo and former Chair of the IIASA Council Peter Lemke joined us at IIASA for a joint lecture on climate risk in weather systems and polar regions. The lecture had one underlying theme: in order to make informed decisions on climate change, we need to embrace uncertainty with a broader understanding of what’s possible. That means that the far-away Arctic needs to be seen as nearby and relevant, and that climate change forecasts once seen as ‘uncertain,’ should instead be interpreted as ‘probable.’
“People are often confusing uncertainty with risk. If it’s uncertain they think they don’t really have to think about it. But there is a risk they take if they avoid things,” says Lemke. “a 40% chance could also mean a doubling of the risk, and a doubling of the risk is something that’s easily understood.”
“It’s a matter of how you communicate it,” says Lemke.
Perhaps Hollywood’s obsession with apocalyptic disaster narratives serves some kind of purpose after all—the stories seem outlandish, but films translate them into concepts we can understand and scenes we’re familiar with. It’s hard to picture what it would be like to live in a world that is 2°C warmer, but thanks to Hollywood special effects, we can picture what it would be like if storms of epic proportions engulfed the Statue of Liberty in a gigantic tidal wave.
“We have get down to people’s personal experience. That’s why I’m so against the use of things like global mean temperature, because people can’t relate to that,” says Slingo. “I am very keen on using narrative, but based on science, so people have access to the evidence for why we have this story that we tell about how climate change could affect them personally.”
Of course, we can’t give Hollywood too much credit: these stories are dangerously lacking input from actual climate science. Nevertheless, armed with the forecasting tools and technologies that have advanced so much over the past decade or so, we can counter uncertainty and get a better understanding of the risks we face. For example, using improved computer models and satellites that determine the age and thickness of ice, we can determine the rates of receding ice, and how much that will affect sea level rise in coastal communities.
Likewise, social media makes it easy to transmit information rapidly to a large audience that might not have been reachable otherwise. Reaching people where they are is of paramount importance—while scientists can put painstaking effort into presenting the most accurate, unbiased account of probable risks, this is just one facet of any given decision. In the end, it is the public and the policymakers that represent them that must make the decision about what actions to take, based on a complete narrative that includes the socioeconomic and cultural factors involved.
“It’s all about dialogue at the end of the day. One of the things I learned as MET office chief scientist was that based on the evidence I was giving to government, you would think that the policy would be quite clear,” says Slingo. “But there are other aspects to take into consideration, such as unemployment or other policy implementation capacities and societal implications.”
That’s why Lemke and Slingo both make huge efforts to communicate with the public, especially with the impressionable, optimistic, social media savvy and politically mobilizing younger generations. From their interactions and outreach with the public, Lemke and Slingo know that once you put climate change in proximity and translate science into narratives that are relevant to the lives of individual citizens, the public does care about climate change. They want to know more, and they want to do something about it.
When it comes to environmental advocacy, education is power, especially when it translates the high-end risk probabilities of climate science into relatable narratives. For Lemke and Slingo, that creates a huge opportunity for scientists of all backgrounds.
“I don’t think climate change has to be depressing. It’s a fantastic opportunity for a whole generation of scientists and engineers to tackle a great problem,” says Slingo. “I actually have the confidence that we’ll solve it.”
by Melina Filzinger, IIASA Science Communication Fellow
Kian Mintz-Woo is a moral philosopher working in the field of climate ethics. He obtained his PhD from the University of Graz and is spending the summer at IIASA as a participant of the Young Scientists Summer Program (YSSP). I recently had the opportunity to talk to him about his work.
How do you feel about joining YSSP as a philosopher?
I know that it is extremely unusual for a philosopher to join YSSP, and I’m really happy to be here. It is very stimulating to be surrounded by people with a different point of view. I appreciate that people are asking me about what philosophers do, or they’ve come across a philosophical text and want to know my opinion. It is extremely valuable to me to talk about my discipline to interested people.
You started out studying logic – how did you become interested in climate change?
I used to do research on abstract and systematic areas of mainstream philosophy. I enjoyed it, but was also interested in social issues. I think climate change is particularly important, because unlike most issues we have a very short time window to deal with it. Of course there are a lot of things we have to change in our society, but climate change is definitely an issue that can’t be put off anymore.
When I started my BPhil in Oxford, I initially worked on similarly abstract topics, but then I met John Broome, an expert in climate ethics. Doing a project with him was both a once-in-a -lifetime-opportunity and a possibility to marry my theoretical training with some of my real-world interests. What I am doing now is about as applied as philosophy can get—I’m on the edge of what some people would even call philosophy—and it is great fun!
What is your project about?
When talking about climate change, we often discuss two things: ways to limit the temperature increase on earth (mitigation), and ways to adapt to the changing conditions that accompany climate change (adaptation). However, we also increasingly have to consider effects of climate change that go beyond what we are able or willing to adapt to. We call this area of research and policy “Loss and Damage”.
We have to think about who is responsible for the Loss and Damage-related burdens that we are and will be facing. In my project, I argue that, conceptually, there is a strong link between historical responsibility for emissions of greenhouse gases and Loss and Damage. This is very relevant for policy as well: We don’t want the farmer who can no longer support himself because changing rain patterns have reduced his crop yield, or the small island nation that might be flooded in the future, to bear the risks related to climate change alone. However, the instruments that can help spread this risk globally require financial burdens.
Most of the discussions about who should be the bearers of these burdens have been in terms of nations, but an interesting paper from 2014 suggests that we should rethink that approach. The main findings of this paper are that only 90 companies producing oil, natural gas, coal, and cement were the source of 63% of historical CO2 emissions. As the number of these so-called carbon majors is so surprisingly small, considering them instead of nations in the discussions about funding might be a valid alternative.
Is it relevant if the effects of these emissions were known at the time?
That is an important question and I think that it should matter. The data we have goes back to 1854, so I feel that at least some of the time the emissions should be considered under the heading of excusable ignorance. We could start holding the carbon majors responsible after a certain year, maybe around 1980 or 1990, and part of my research is finding out how the selection of the carbon majors depends on the chosen point.
How does your work relate to the research going on in the IIASA RISK Program?
It is great being in the RISK group. My input as a philosopher is making conceptual suggestions and bringing in fairly blue-sky policy solutions. What I am getting from my supervisors are real-world implications of these suggestions, such as risk instruments that might be relevant for the implementation of my ideas. So together, we are aiming to make these abstract ideas policy-relevant.
Why should we apply philosophical concepts to problems like climate change?
Science can help us figure out which pathways are available, but scientists are often not very well trained in evaluating those beyond their economic-technical approach. Moral philosophers can bring in new perspectives for evaluating these options.
What I am doing at IIASA however, is taking a step back from the research that is going on in order to ask fundamental questions. I want to provide ambitious proposals, and find out what they would push us towards if we were trying to implement them. This often requires bringing concepts and results together from different areas of research to obtain a broader view on the problem.
What do you want to achieve by the end of the summer?
I hope to achieve a policy proposal that is ambitious but defensible. I want to develop a clear argument as to why the carbon majors are more responsible for Loss and Damage than for mitigation and adaptation. I think this approach is both new and quite important, especially for many developing countries and small island states.
Apart from your research project, what are you looking forward to most this summer?
I am getting married this month, so this is an especially exciting and busy summer for me!
Note: This article gives the views of the authors, and not the position of the Nexus blog, nor of the International Institute for Applied Systems Analysis.