The Collapse of Civilization May Have Already Begun
Scientists disagree on the timeline of collapse and whether it's imminent. But can we afford to be wrong? And what comes after?
By Nafeez Ahmed - 22. November 2019
“It is now too late to stop a future collapse of our societies because of climate change.”
These are not the words of a tinfoil hat-donning survivalist. This is from a paper delivered by a senior sustainability academic at a leading business school to the European Commission in Brussels, earlier this year. Before that, he delivered a similar message to a UN conference: “Climate change is now a planetary emergency posing an existential threat to humanity.”
In the age of climate chaos, the collapse of civilization has moved from being a fringe, taboo issue to a more mainstream concern.
As the world reels under each new outbreak of crisis—record heatwaves across the Western hemisphere, devastating fires across the Amazon rainforest, the slow-moving Hurricane Dorian, severe ice melting at the poles—the question of how bad things might get, and how soon, has become increasingly urgent.
The fear of collapse is evident in the framing of movements such as ‘Extinction Rebellion’ and in resounding warnings that business-as-usual means heading toward an uninhabitable planet.
But a growing number of experts not only point at the looming possibility that human civilization itself is at risk; some believe that the science shows it is already too late to prevent collapse. The outcome of the debate on this is obviously critical: it throws light on whether and how societies should adjust to this uncertain landscape.
Yet this is not just a scientific debate. It also raises difficult moral questions about what kind of action is warranted to prepare for, or attempt to avoid, the worst. Scientists may disagree about the timeline of collapse, but many argue that this is entirely beside the point. While scientists and politicians quibble over timelines and half measures, or how bad it'll all be, we are losing precious time. With the stakes being total collapse, some scientists are increasingly arguing that we should fundamentally change the structure of society just to be safe.
Jem Bendell, a former consultant to the United Nations and longtime Professor of Sustainability Leadership at the University of Cumbria’s Department of Business, delivered a paper in May 2019 explaining how people and communities might “adapt to climate-induced disruption.”
Bendell’s thesis is not only that societal collapse due to climate change is on its way, but that it is, in effect, already here. “Climate change will disrupt your way of life in your lifetimes,” he told the audience at a climate change conference organized by the European Commission.
Devastating consequences, like “the cascading effects of widespread and repeated harvest failures” are now unavoidable, Bendell’s paper says.
He argues this is not so much a doom-and-gloom scenario as a case of waking up to reality, so that we can do as much as we can to save as many lives as possible. His recommended response is what he calls “Deep Adaptation,” which requires going beyond “mere adjustments to our existing economic system and infrastructure, in order to prepare us for the breakdown or collapse of normal societal functions.”
Bendell’s message has since gained a mass following and high-level attention. It is partly responsible for inspiring the new wave of climate protests reverberating around the world.
In March, he launched the Deep Adaptation Forum to connect and support people who, in the face of “inevitable” societal collapse, want to explore how they can “reduce suffering, while saving more of society and the natural world.” Over the last six months, the Forum has gathered more than 10,000 participants. More than 600,000 people have downloaded Bendell’s paper, called Deep Adaptation: A Map for Navigating our Climate Tragedy, published by the University of Cumbria’s Institute of Leadership and Sustainability (IFALS). And many of the key organizers behind the Extinction Rebellion (XR) campaign joined the protest movement after reading it.
“There will be a near-term collapse in society with serious ramifications for the lives of readers,” concludes that paper, released in 2017.
Catastrophe is “probable,” it adds, and extinction “is possible.” Over coming decades, we will see the escalating impacts of the fossil fuel pollution we have already pumped into the atmosphere and oceans. Even if we ceased emissions tomorrow, Bendell argues, the latest climate science shows that “we are now in a climate emergency, which will increasingly disrupt our way of life… a societal collapse is now inevitable within the lifetimes of readers of this paper.”
Bendell puts a rough timeline on this. Collapse will happen within 10 years and inflict disruptions across nations, involving “increased levels of malnutrition, starvation, disease, civil conflict, and war.”
Yet this diagnosis opens up far more questions than it answers. I was left wondering: Which societies are at risk of collapsing due to climate change, and when? Some societies or all societies? Simultaneously or sequentially? Why some rather than others? And how long will the collapse process take? Where will it start, and in what sector? How will that impact others sectors? Or will it take down all sectors of societies in one fell swoop? And what does any of this imply for whether, or how, we might prepare for collapse?
In attempting to answer these questions, I spoke to a wide-range of scientists and experts, and took a deep dive into the obscure but emerging science of how societies and civilizations collapse. I wanted to understand not just whether Bendell’s forecast was right, but to find out what a range experts from climate scientists to risk analysts were unearthing about the possibility of our societies collapsing in coming years and decades.
The emerging science of collapse is still, unfortunately, a nascent field. That's because it's an interdisciplinary science that encompasses not only the incredibly complex, interconnected natural systems that comprise the Earth System, but also has to make sense of how those systems interact with the complex, interconnected social, political, economic, and cultural systems of the Human System.
What I discovered provoked a wide range of emotions. I was at times surprised and shocked, often frightened, sometimes relieved. Mostly, I was unsettled. Many scientists exposed flaws in Bendell’s argument. Most rejected the idea of inevitable near-term collapse outright. But to figure out whether a near-term collapse scenario of some kind was likely led me far beyond Bendell. A number of world leading experts told me that such a scenario might, in fact, be far more plausible than conventionally presumed.
Science, gut, or a bit of both?
According to Penn State professor Michael Mann, one of the world’s most renowned climate scientists, Bendell’s grasp of the climate science is deeply flawed.
“To me, this paper is a perfect storm of misguidedness and wrongheadedness,” he told me.
FIREFIGHTERS WORK TO PUT OUT FIRE MARIA IN CALIFORNIA. IMAGE: APU GOMES/AFP VIA GETTY IMAGES
Bendell’s original paper had been rejected for publication by the peer-reviewed Sustainability Accounting, Management and Policy Journal. According to Bendell, the changes that editorial reviewers said were necessary to make the article fit for publication made no sense. But among them, one referee questioned whether Bendell’s presentation of climate data actually supported his conclusion: “I am not sure that the extensive presentation of climate data supports the core argument of the paper in a meaningful way.”
In his response, sent in the form of a letter to the journal’s chief editor, Bendell wrote: “Yet the summary of science is the core of the paper as everything then flows from the conclusion of that analysis. Note that the science I summarise is about what is happening right now, rather than models or theories of complex adaptive systems which the reviewer would have preferred.”
But in Mann’s view, the paper’s failure to pass peer review was not simply because it didn’t fit outmoded academic etiquette, but for the far more serious reason that it lacks scientific rigor. Bendell, he said, is simply “wrong on the science and impacts: There is no credible evidence that we face ‘inevitable near-term collapse.’”
Dr. Gavin Schmidt, head of NASA’s Goddard Institute for Space Studies, who is also world-famous, was even more scathing.
“There are both valid points and unjustified statements throughout,” he told me about Bendell's paper. “Model projections have not underestimated temperature changes, not everything that is non-linear is therefore ‘out of control.’ Blaming ‘increased volatility from more energy in the atmosphere’ for anything is silly. The evidence for ‘inevitable societal collapse’ is very weak to non-existent.”
Schmidt did not rule out that we are likely to see more instances of local collapse events. “Obviously we have seen such collapses in specific locations associated with extreme storm impacts,” he said. He listed off a number of examples—Puerto Rico, Barbuda, Haiti, and New Orleans—explaining that while local collapses in certain regions could be possible, it's a "much harder case to make" at a global level. "And this paper doesn't make it. I’m not particularly sanguine about what is going to happen, but this is not based on anything real.”
Jeremy Lent, systems theorist and author of The Patterning Instinct: A Cultural History of Humanity’s Search for Meaning, argues that throughout Bendell’s paper he frequently slips between the terms “inevitable,” “probably,” and “likely.”
“If he chooses to go with his gut instinct and conclude collapse is inevitable, he has every right to do so,” Lent said, “but I believe it’s irresponsible to package this as a scientifically valid conclusion, and thereby criticize those who interpret the data otherwise as being in denial.”
When I pressed Bendell on this issue, he pushed back against the idea that he was putting forward a hard, scientifically-valid forecast, describing it as a “guess”: “I say in the original paper that I am only guessing at when social collapse will occur. I have said or written that every time I mention that time horizon.”
But why offer this guess at all? “The problem I have with the argument that I should not give a time horizon like 10 years is that not deciding on a time horizon acts as a psychological escape from facing our predicament. If we can push this problem out into 2040 or 2050, it somehow feels less pressing. Yet, look around. Already harvests are failing because of weather made worse by climate change.”
Bendell points out that such impacts are already damaging more vulnerable, poorer societies than our own. He says it is only a matter of time before they damage the normal functioning of “most countries in the world.”
Global food system failure
According to Dr. Wolfgang Knorr, Principal Investigator at Lund University’s Biodiversity and Ecosystem Services in a Changing Climate Program, the risk of near-term collapse should be taken far more seriously by climate scientists, given the fact that so much is unknown about climate tipping points: “I am not saying that Bendell is right or wrong. But the criticism of Bendell’s points focuses too much on the detail and in that way studiously tries to avoid the bigger picture. The available data points to the fact that some catastrophic climate change is inevitable."
Bendell argues that the main trigger for some sort of collapse—which he defines as “an uneven ending of our normal modes of sustenance, security, pleasure, identity, meaning, and hope”—will come from accelerating failures in the global food system.
We know that it is a distinct possibility that so-called multi-breadbasket failures (when major yield reductions take place simultaneously across agricultural areas producing staple crops like rice, wheat, or maize) can be triggered by climate change—and have already happened.
As shown by American physicist Dr. Yaneer Ban Yam and his team at the New England Complex Systems Institute, in the years preceding 2011, global food price spikes linked to climate breakdown played a role in triggering the ‘Arab Spring’ uprisings. And according to hydroclimatologist Dr. Peter Gleick, climate-induced drought amplified the impact of socio-political and economic mismanagement, inflicting agricultural failures in Syria. These drove mass migrations within the country, in turn laying the groundwork for sectarian tensions that spilled over into a protracted conflict.
In my own work, I found that the Syrian conflict was not just triggered by climate change, but a range of intersecting factors—Syria’s domestic crude oil production had peaked in the mid-90s, leading state revenues to hemorrhage as oil production and exports declined. When global climate chaos triggered food price spikes, the state had begun slashing domestic fuel and food subsidies, already reeling from the impact of economic mismanagement and corruption resulting in massive debt levels. And so, a large young population overwhelmed with unemployment and emboldened by decades of political repression took to the streets when they could not afford basic bread. Syria has since collapsed into ceaseless civil war.
This is a case of what Professor Thomas-Homer Dixon, University Research Chair in the University of Waterloo’s Faculty of Environment, describes as “synchronous failure”—when multiple, interconnected stressors amplify over time before triggering self-reinforcing feedback loops which result in them all failing at the same time. In his book, The Upside of Down: Catastrophe, Creativity and the Renewal of Civilization, he explains how the resulting convergence of crises overwhelms disparate political, economic and administrative functions, which are not designed for such complex events.
From this lens, climate-induced collapse has already happened, though it is exacerbated by and amplifies the failure of myriad human systems. Is Syria a case-study of what is in store for the world? And is it inevitable within the next decade?
In a major report released in August, the UN’s Intergovernmental Panel on Climate Change (IPCC) warned that hunger has already been rising worldwide due to climate impacts. A senior NASA scientist, Cynthia Rosenzweig, was a lead author of the study, which warned that the continued rise in carbon emissions would drive a rise in global average temperatures of 2°C in turn triggering a “very high” risk to food supplies toward mid-century. Food shortages would hit vulnerable, poorer regions, but affluent nations may also be in the firing line. As a new study from the UK Parliamentary Environment Audit Committee concludes, fruit and vegetable imports to countries like Britain might be cut short if a crisis breaks out.
When exactly such a crisis might happen is not clear. Neither reports suggest it would result in the collapse of civilization, or even most countries, within 10 years. And the UN also emphasizes that it is not too late to avert these risks through a shift to organic and agro-ecological methods.
NASA’s Gavin Schmidt acknowledged “increasing impacts from climate change on global food production,” but said that a collapse “is not predicted and certainly not inevitable.”
The catastrophic ‘do-nothing’ scenario
A few years ago, though, I discovered first-hand that a catastrophic collapse of the global food system is possible in coming decades if we don’t change course. At the time I was a visiting research fellow at Anglia Ruskin University’s Global Sustainability Institute, and I had been invited to a steering committee meeting for the Institute’s Global Research Observatory (GRO), a research program developing new models of global crisis.
One particular model, the Dawe Global Security Model, was focused on the risk of another global food crisis, similar to what triggered the Arab Spring.
“We ran the model forward to the year 2040, along a business-as-usual trajectory based on ‘do-nothing’ trends—that is, without any feedback loops that would change the underlying trend,” said institute director Aled Jones to the group of stakeholders in the room, which included UK government officials. “The results show that based on plausible climate trends, and a total failure to change course, the global food supply system would face catastrophic losses, and an unprecedented epidemic of food riots. In this scenario, global society essentially collapses as food production falls permanently short of consumption.”
Jones was at pains to clarify that this model-run could not be taken as a forecast, particularly as mitigation policies are already emerging in response to concern about such an outcome: “This scenario is based on simply running the model forward,” he said. “The model is a short-term model. It’s not designed to run this long, as in the real world trends are always likely to change, whether for better or worse.”
Someone asked, “Okay, but what you’re saying is that if there is no change in current trends, then this is the outcome?”
“Yes,” Jones replied quietly.
The Dawe Global Security Model put this potential crisis two decades from now. Is it implausible that the scenario might happen much earlier? And if so why aren’t we preparing for this risk?
When I asked UN disaster risk advisor Scott Williams about a near-term global food crisis scenario, he pointed out that this year’s UN flagship global disaster risk assessment was very much aware of the danger of another global "multiple breadbasket failure."
“A projected increase in extreme climate events and an increasingly interdependent food supply system pose a threat to global food security,” warned the UN Global Assessment Report on Disaster Risk Reduction released in May. “For instance, local shocks can have far-reaching effects on global agricultural markets.”
Climate models we've been using are not too alarmist; they are consistently too conservative, and we have only recently understood how bad the situation really is.
Current agricultural modelling, the UN report said, does not sufficiently account for these complex interconnections. The report warns that “climate shocks and consequent crop failure in one of the global cereal breadbaskets might have knock-on effects on the global agricultural market. The turbulences are exacerbated if more than one of the main crop-producing regions suffers from losses simultaneously.”
Williams, who was a coordinating lead author of the UN global disaster risk assessment, put it more bluntly: “In a nutshell, Bendell is closer to the mark than his critics.”
He pointed me to the second chapter of the UN report which, he said, expressed the imminent risk to global civilization in a “necessarily politically desensitized” form. The chapter is “close to stating that ‘collapse is inevitable’ and that the methods that we—scientists, modellers, researchers, etc—are using are wholly inadequate to understand that nature of complex, uncertain ‘transitions,’ in other words, collapses.”
Williams fell short of saying that such a collapse scenario was definitely unavoidable, and the UN report—while setting out an alarming level of risk—did not do so either. What they did make clear is that a major global food crisis could erupt unexpectedly, with climate change as a key trigger.
Climate tipping points
A new study by a team of scientists at Oxford, Bristol, and Austria concludes that our current carbon emissions trajectory hugely increases this risk. Published in October in the journal Agricultural Systems, the study warns that the rise in global average temperatures is increasing the likelihood of “production shocks” affecting an increasingly interconnected global food system.
Surpassing the 1.5 °C threshold could potentially trigger major “production losses” of millions of tonnes of maize, wheat and soybean.
Right now, carbon dioxide emissions are on track to dramatically increase this risk of multi-breadbasket failures. Last year, the IPCC found that unless we reduce our emissions levels by five times their current amount, we could hit 1.5°C as early as 2030, and no later than mid-century. This would dramatically increase the risk of simultaneous crop failures, food production shocks and other devastating climate impacts.
In April this year, the European Commission’s European Strategy and Policy Analysis System published its second major report to EU policymakers, Global Trends to 2030: Challenges and Choices for Europe. The report, which explores incoming national security, geopolitical and socio-economic risks, concluded: “An increase of 1.5 degrees is the maximum the planet can tolerate; should temperatures increase further beyond 2030, we will face even more droughts, floods, extreme heat and poverty for hundreds of millions of people; the likely demise of the most vulnerable populations—and at worst, the extinction of humankind altogether.”
IMAGE: FETHI BELAID/AFP VIA GETTY IMAGES
But the IPCC’s newer models suggest that the situation is even worse than previously thought. Based on increased supercomputing power and sharper representations of weather systems, those new climate models—presented at a press conference in Paris in late September—reveal the latest findings of the IPCC’s sixth assessment report now underway.
The models now show that we are heading for 7°C by the end of the century if carbon emissions continue unabated, two degrees higher than last year’s models. This means the earth is far more sensitive to atmospheric carbon than previously believed.
This suggests that the climate models we've been using are not too alarmist; they are consistently too conservative, and we have only recently understood how bad the situation really is.
I spoke to Dr. Joelle Gergis, a lead author on the IPCC’s sixth assessment report, about the new climate models. Gergis admitted that at least eight of the new models being produced for the IPCC by scientists in the US, UK, Canada and France suggest a much higher climate sensitivity than older models of 5°C or warmer. But she pushed back against the idea that these findings prove the inevitability of collapse, which she criticized as outside the domain of climate science. Rather, the potential implications of the new evidence are not yet known.
“Yes, we are facing alarming rates of change and this raises the likelihood of abrupt, non-linear changes in the climate system that may cause tipping points in the Earth’s safe operating space,” she said. “But we honestly don’t know how far away we are from that just yet. It may also be the case that we can only detect that we’ve crossed such a threshold after the fact.”
In an article published in August in the Australian magazine The Monthly, Dr. Gergis wrote: “When these results were first released at a climate modelling workshop in March this year, a flurry of panicked emails from my IPCC colleagues flooded my inbox. What if the models are right? Has the Earth already crossed some kind of tipping point? Are we experiencing abrupt climate change right now?”
Half the Great Barrier Reef’s coral system has been wiped out at current global average temperatures which are now hovering around 1°C higher than pre-industrial levels. Gergis describes this as “catastrophic ecosystem collapse of the largest living organism on the planet.” At 1.5°C, between 70 and 90 percent of reef-building corals are projected to be destroyed, and at 2°C, some 99 percent may disappear: “An entire component of the Earth’s biosphere—our planetary life support system—would be eliminated. The knock-on effects on the 25 percent of all marine life that depends on coral reefs would be profound and immeasurable… The very foundation of human civilization is at stake.”
But Gergis told me that despite the gravity of the new models, they do not prove conclusively that past emissions will definitely induce collapse within the next decade.
“While we are undeniably observing rapid and widespread climate change across the planet, there is no concrete evidence that suggests we are facing ‘an inevitable, near term society collapse due to climate change,’” she said. “Yes, we are absolutely hurtling towards conditions that will create major instabilities in the climate system, and time is running out, but I don’t believe it is a done deal just yet.”
Yet it is precisely the ongoing absence of strong global policy that poses the fatal threat. According to Lund University climate scientist Wolfgang Knorr, the new climate models mean that practically implementing the Paris Accords target of keeping temperatures at 1.5 degrees is now extremely difficult. He referred me to his new analysis of the challenge published on the University of Cumbria’s ILFAS blog, suggesting that the remaining emissions budget given by the IPCC “will be exhausted at the beginning of 2025.” He also noted that past investment in fossil-fuel and energy infrastructure alone will put us well over that budget.
The scale of the needed decarbonization is so great and so rapid, according to Tim Garrett, professor of atmospheric sciences at the University of Utah, that civilization would need to effectively “collapse” its energy consumption to avoid collapsing due to climate catastrophe. In a 2012 paper in Earth System Dynamics, he concluded therefore that “civilization may be in a double-bind.”
"We still have time to try and avert the scale of the disaster, but we must respond as we would in an emergency"
In a previous paper in Climatic Change, Garrett calculated that the world would need to switch to non-carbon renewable energy sources at a rate of about 2.1 percent a year just to stabilize emissions. “That comes out [equivalent] to almost one new nuclear power plant per day,” Garrett said. Although he sees this as fundamentally unrealistic, he concedes that a crash transition programme might help: “If society invests sufficient resources into alternative and new, non-carbon energy supplies, then perhaps it can continue growing without increasing global warming.”
Gergis goes further, insisting that it is not yet too late: “We still have time to try and avert the scale of the disaster, but we must respond as we would in an emergency. The question is, can we muster the best of our humanity in time?”
There is no straightforward answer to this question. To get there, we need to understand not just climate science, but the nature, dynamics, and causes of civilizational collapse.
Limits to Growth
One of the most famous scientific forecasts of collapse was conducted nearly 50 years ago by a team of scientists at MIT. Their "Limits to Growth" (LTG) model, known as "World3," captured the interplay between exponential population and economic growth, and the consumption of raw materials and natural resources. Climate change is an implicit feature of the model.
LTG implied that business-as-usual would lead to civilizational breakdown, sometime between the second decade and middle of the 21st century, due to overconsumption of natural resources far beyond their rate of renewal. This would escalate costs, diminish returns, and accelerate environmental waste, ecosystem damage, and global heating. With more capital diverted to the cost of extracting resources, less is left to invest in industry and other social goods, driving long-term economic decline and political unrest.
The forecast was widely derided when first published, and its core predictions were often wildly misrepresented by commentators who claimed it had incorrectly forecast the end of the world by the year 2000 (it didn’t).
Systems scientist Dennis Meadows had headed up the MIT team which developed the ‘World3’ model. Seven years ago, he updated the original model in light of new data with co-author Jorgen Randers, another original World3 team-member.
“For those who respect numbers, we can report that the highly aggregated scenarios of World3 still appear… to be surprisingly accurate,” they wrote in Limits to Growth: the 30 year update. “The world is evolving along a path that is consistent with the main features of the scenarios in LTG.”
One might be forgiven for suspecting that the old MIT team were just blowing their own horn. But a range of independent scientific reviews, some with the backing of various governments, have repeatedly confirmed that the LTG ‘base scenario’ of overshoot and collapse has continued to fit new data. This includes studies by Professor Tim Jackson of the University of Surrey, an economics advisor to the British government and Ministry of Defense; Australia’s federal government scientific research agency CSIRO; Melbourne University’s Sustainable Society Institute; and the Institute and Faculty of Actuaries in London.
“Collapse is not a very precise term. It is possible that there would be a general, drastic, uncontrolled decline in population, material use, and energy consumption by 2030 from climate change," Meadows told me when I asked him whether the LTG model shines any light on the risk of imminent collapse. "But I do not consider it to be a high probability event,” he said. Climate change would, however, “certainly suffice to alter our industrial society drastically by 2100.” It could take centuries or millennia for ecosystems to recover.
But there is a crucial implication of the LTG model that is often overlooked: what happens during collapse. During an actual breakdown, new and unexpected social dynamics might come into play which either worsen or even lessen collapse.
Those dynamics all depend on human choices. They could involve positive changes through reform in political leadership or negative changes such as regional or global wars.
That’s why modelling what happens during the onset of collapse is especially tricky, because the very process of collapse alters the dynamics of change.
Growth, complexity and resource crisis
What if, then, collapse is not necessarily the end? That’s the view of Ugo Bardi, of the University of Florence, who has developed perhaps the most intriguing new scientific framework for understanding collapse.
Earlier this year, Bardi and his team co-wrote a paper in the journal BioPhysical Economics and Resource Quality, drawing on the work of anthropologist Joseph Tainter at Utah State University’s Department of Environment and Society. Tainter’s seminal book, The Collapse of Complex Societies, concluded that societies collapse when their investments in social complexity reach a point of diminishing marginal returns.
Tainter studied the fall of the Western Roman empire, Mayan civilization, and Chaco civilization. As societies develop more complex and specialized bureaucracies to solve emerging problems, these new layers of problem-solving infrastructure generate new orders of problems. Further infrastructure is then developed to solve those problems, and the spiral of growth escalates.
As each new layer also requires a new ‘energy’ subsidy (greater consumption of resources), it eventually cannot produce enough resources to both sustain itself and resolve the problems generated. The result is that society collapses to a new equilibrium by shedding layers of complex infrastructure amassed in previous centuries. This descent takes between decades and centuries.
In his recent paper, Bardi used computer models to test how Tainter’s framework stood-up. He found that diminishing returns from complexity were not the main driver of a system’s decline; rather the decline in complexity of the system is due to diminishing returns from exploiting natural resources.
In other words, collapse is a result of a form of endless growth premised on the unsustainable consumption of resources, and the new order of increasingly unresolvable crises this generates.
In my view, we are already entering a perfect storm feedback loop of complex problems that existing systems are too brittle to solve. The collapse of Syria, triggered and amplified partly by climate crisis, did not end in Syria. Its reverberations have not only helped destabilize the wider Middle East, but contributed to the destabilization of Western democracies.
In January, a study in Global Environment Change found that the impact of “climatic conditions” on “drought severity” across the Middle East and North Africa amplified the “likelihood of armed conflict.” The study concluded that climate change therefore played a pivotal role in driving the mass asylum seeking between 2011 and 2015—including the million or so refugees who arrived in Europe in 2015 alone, nearly 50 percent of whom were Syrian. The upsurge of people fleeing the devastation of their homes was a gift to the far-right, exploited by British, French and other nationalists campaigning for the break-up of the European Union, as well as playing a role in Donald Trump’s political campaigning around The Wall.
To use my own terminology, Earth System Disruption (ESD) is driving Human System Destabilization (HSD). Preoccupied with the resulting political chaos, the Human System becomes even more vulnerable and incapable of ameliorating ESD. As ESD thus accelerates, it generates more HSD. The self-reinforcing cycle continues, and we find ourselves in an amplifying feedback loop of disruption and destabilization.
Is there a way out of this self-destructive amplifying feedback loop? Bardi’s work suggests there might be—that collapse can pave the way for a new, more viable form of civilization, whether or not countries and regions experience collapses, crises, droughts, famine, violence, and war as a result of ongoing climate chaos.
Bardi’s analysis of Tainter’s work extends the argument he first explored in his 2017 peer-reviewed study, The Seneca Effect: When Growth is Slow but Collapse is Rapid. The book is named after the Roman philosopher Lucius Annaeus Seneca, who once said that “fortune is of sluggish growth, but ruin is rapid.”
Bardi examines a wide-range of collapse cases across human societies (from the fall of past empires, to financial crises and large-scale famines), in nature (avalanches) and through artificial structures (cracks in metal objects). His verdict is that collapse is not a “bug,” but a “varied and ubiquitous phenomena” with multiple causes, unfolding differently, sometimes dangerously, sometimes not. Collapse also often paves the way for the emergence of new, evolutionary structures.
In an unpublished manuscript titled Before the Collapse: A Guide to the Other Side of Growth, due to be published by science publisher Springer-Nature next year, Bardi’s examination of the collapse and growth of human civilizations reveals that after collapse, a "Seneca Rebound" often takes place in which new societies grow, often at a rate faster than preceding growth rates.
This is because collapse eliminates outmoded, obsolete structures, paving the way for new structures to emerge which often thrive from the remnants of the old and in the new spaces that emerge.
He thus explains the Seneca Rebound as “as an engine that propels civilizations forward in bursts. If this is the case, can we expect a rebound if the world’s civilization goes through a new Seneca Collapse in the coming decades?”
Bardi recognizes that the odds are on a knife-edge. A Seneca Rebound after a coming collapse would probably have different features to what we have seen after past civilizational collapses and might still involve considerable violence, as past new civilizations often did—or may not happen at all.
"Very little if anything is being done to stop emissions and the general destruction of the ecosystem"
On our current trajectory, he said, “the effects of the destruction we are wreaking on the ecosystem could cause humans to go extinct, the ultimate Seneca Collapse.” But if we change course, even if we do not avoid serious crises, we might lessen the blow of a potential collapse. In this scenario, “the coming collapse will be just one more of the series of previous collapses that affected human civilizations: it might lead to a new rebound.”
It is in this possibility that Bardi sees the seeds of a new, different kind of civilization within the collapse of civilization-as-we-know-it.
I asked Bardi how soon he thought this collapse would happen. Although emphasizing that collapse is not yet inevitable, he said that a collapse of some kind within the next decade could be “very likely” if business-as-usual continues.
“Very little if anything is being done to stop emissions and the general destruction of the ecosystem,” Bardi said. “So, an ecosystemic collapse is not impossible within 10 years."
Yet he was also careful to point out that the worst might be avoided: “On the other hand, there are many elements interacting that may change things a little, a lot, or drastically. We don’t know how the system may react… maybe the system would react in a way that could postpone the worst.”
Release and renewal
The lesson is that even if collapse is imminent, all may not be lost. Systems theorist Jeremy Lent, author of The Patterning Instinct, draws on the work of the late University of Florida ecologist C. S. Holling, whose detailed study of natural ecosystems led him to formulate a general theory of social change known as the adaptive cycle.
Complex systems, whether in nature or in human societies, pass through four phases in their life cycle, writes Lent. First is a rapid growth phase of innovation and opportunity for new structures; second is a phase of stability and consolidation, during which these structures become brittle and resistant to change; third is a release phase consisting of breakdown, generating chaos and uncertainty; the fourth is reorganization, opening up the possibility that small, seemingly insignificant forces might drastically change the future of the forthcoming new cycle.
It is here, in the last two phases, that the possibility of triggering and shaping a Seneca Rebound becomes apparent. The increasing chaos of global politics, Lent suggests, is evidence that we are “entering the chaotic release phase,” where the old order begins to unravel. At this point, the system could either regress, or it could reorganize in a way that enables a new civilizational rebound. “This is a crucially important moment in the system’s life cycle for those who wish to change the predominant order.”
So as alarming as the mounting evidence of the risk of collapse is, it also indicates that we are moving into a genuinely new and indeterminate phase in the life cycle of our current civilization, during which we have a radical opportunity to mobilize the spread of new ideas that can transform societies.
I have been tracking the risks of collapse throughout my career as a journalist and systems theorist. I could not find any decisive confirmation that climate change will inevitably produce near-term societal collapse.
But the science does not rule this out as a possibility. Therefore, dismissing the risk of some sort of collapse—whether by end of century, mid-century, or within the next 10 years—contravenes the implications of the most robust scientific models we have.
All the scientific data available suggests that if we continue on our current course of resource exploitation, human civilization could begin experiencing collapse within coming decades. Exactly where and how such a collapse process might take off is not certain; and whether it is already locked in is as yet unknown. And as NASA’s Gavin Schmidt told me, local collapses are already underway.
From Syria to Brexit, the destabilizing socio-political impacts of ecosystemic collapse are becoming increasingly profound, far-reaching and intractable. In that sense, debating whether or not near-term collapse is inevitable overlooks the stark reality that we are already witnessing climate collapse.
And yet, there remains an almost total absence of meaningful conversation and action around this predicament, despite it being perhaps the most important issue of our times.
The upshot is that we don’t know for sure what is round the corner, and we need better conversations about how to respond to the range of possibilities. Preparation for worst-case scenarios does not require us to believe them inevitable, but vindicates the adoption of a rational, risk-based approach designed to proactively pursue the admirable goal for Deep Adaptation: safeguarding as much of society as possible.
Jem Bendell’s Deep Adaptation approach, he told me, is not meant to provide decisive answers about collapse, but to catalyze conversation and action.
“For the Deep Adaptation groups that I am involved with, we ask people to agree that societal collapse is either likely, inevitable or already unfolding, so that we can have meaningful engagement upon that premise,” he said. “Deep Adaptation has become an international movement now, with people mobilizing to share their grief, discuss what to commit to going forward, become activists, start growing food, all kinds of things.”
Confronting the specter of collapse, he insisted is not grounds to give-up, but to do more. Not later, but right now, because we are already out of time in terms of the harm already inflicted on the planet: “My active and radical hope is that we will do all kinds of amazing things to reduce harm, buy time and save what we can," he said. "Adaptation and mitigation are part of that agenda. I also know that many people will act in ways that create more suffering."
Most of all, the emerging science of collapse suggests that civilization in its current form, premised on endless growth and massive inequalities, is unlikely to survive this century. It will either evolve into or be succeeded by a new configuration, perhaps an “ecological civilization”, premised on a fundamentally new relationship with the Earth and all its inhabitants—or it will, whether slowly or more abruptly, regress and contract.
What happens next is still up to us. Our choices today will not merely write our own futures, they determine who we are, and what our descendants will be capable of becoming. As we look ahead, this strange new science hints to us at a momentous opportunity to become agents of change for an emerging paradigm of life and society that embraces, not exploits, the Earth. Because doing so is now a matter of survival.
U.S. Military Could Collapse Within 20 Years Due to Climate Change, Report Commissioned By Pentagon Says
The report says a combination of global starvation, war, disease, drought, and a fragile power grid could have cascading, devastating effects.
By Nafeez Ahmed - 24. October 2019
The report was commissioned by General Mark Milley, Trump's new chairman of the Joint Chiefs of Staff, making him the highest-ranking military officer in the country (the report also puts him at odds with Trump, who does not take climate change seriously.)
According to a new U.S. Army report, Americans could face a horrifically grim future from climate change involving blackouts, disease, thirst, starvation and war. The study found that the US military itself might also collapse. This could all happen over the next two decades, the report notes.
The senior US government officials who wrote the report are from several key agencies including the Army, Defense Intelligence Agency, and NASA. The study called on the Pentagon to urgently prepare for the possibility that domestic power, water, and food systems might collapse due to the impacts of climate change as we near mid-century.
The report, titled Implications of Climate Change for the U.S. Army, was launched by the U.S. Army War College in partnership with NASA in May at the Wilson Center in Washington DC. The report was commissioned by Gen. Milley during his previous role as the Army’s Chief of Staff. It was made publicly available in August via the Center for Climate and Security, but didn't get a lot of attention at the time.
The two most prominent scenarios in the report focus on the risk of a collapse of the power grid within “the next 20 years,” and the danger of disease epidemics. Both could be triggered by climate change in the near-term, it notes.
“Increased energy requirements” triggered by new weather patterns like extended periods of heat, drought, and cold could eventually overwhelm “an already fragile system.”
The report also warns that the US military should prepare for new foreign interventions in Syria-style conflicts, triggered due to climate-related impacts. Bangladesh in particular is highlighted as the most vulnerable country to climate collapse in the world.
“The permanent displacement of a large portion of the population of Bangladesh would be a regional catastrophe with the potential to increase global instability,” the report warns. “This is a potential result of climate change complications in just one country. Globally, over 600 million people live at sea level.”
Sea level rise, which could go higher than 2 meters by 2100 according to one recent study, “will displace tens (if not hundreds) of millions of people, creating massive, enduring instability,” the report adds.
The US should therefore be ready to act not only in Bangladesh, but in many other regions, like the rapidly melting Arctic—where the report recommends the US military should take advantage of its hydrocarbon resources and new transit routes to repel Russian encroachment.
But without urgent reforms, the report warns that the US military itself could end up effectively collapsing as it tries to respond to climate collapse. It could lose capacity to contain threats in the US and could wilt into “mission failure” abroad due to inadequate water supplies.
Total collapse of the power grid
The report paints a frightening portrait of a country falling apart over the next 20 years due to the impacts of climate change on “natural systems such as oceans, lakes, rivers, ground water, reefs, and forests.”
Current infrastructure in the US, the report says, is woefully underprepared: “Most of the critical infrastructures identified by the Department of Homeland Security are not built to withstand these altered conditions.”
Some 80 percent of US agricultural exports and 78 percent of imports are water-borne. This means that episodes of flooding due to climate change could leave lasting damage to shipping infrastructure, posing “a major threat to US lives and communities, the US economy and global food security,” the report notes.
At particular risk is the US national power grid, which could shut down due to “the stressors of a changing climate,” especially changing rainfall levels:
“The power grid that serves the United States is aging and continues to operate without a coordinated and significant infrastructure investment. Vulnerabilities exist to electricity-generating power plants, electric transmission infrastructure and distribution system components,” it states.
As a result, the “increased energy requirements” triggered by new weather patterns like extended periods of heat, drought, and cold could eventually overwhelm “an already fragile system.”
A DIAGRAM FROM THE REPORT.
The report’s grim prediction has already started playing out, with utility PG&E cutting power to more than a million people across California to avoid power lines sparking another catastrophic wildfire. While climate change is intensifying the dry season and increasing fire risks, PG&E has come under fire for failing to fix the state’s ailing power grid.
The US Army report shows that California’s power outage could be a taste of things to come, laying out a truly dystopian scenario of what would happen if the national power grid was brought down by climate change. One particularly harrowing paragraph lists off the consequences bluntly:
“If the power grid infrastructure were to collapse, the United States would experience significant:
- Loss of perishable foods and medications
- Loss of water and wastewater distribution systems
- Loss of heating/air conditioning and electrical lighting systems
- Loss of computer, telephone, and communications systems (including airline flights, satellite networks and GPS services)
- Loss of public transportation systems
- Loss of fuel distribution systems and fuel pipelines
- Loss of all electrical systems that do not have back-up power”
Although the report does not dwell on the implications, it acknowledges that a national power grid failure would lead to a perfect storm requiring emergency military responses that might eventually weaken the ability of the US Army to continue functioning at all: “Relief efforts aggravated by seasonal climatological effects would potentially accelerate the criticality of the developing situation. The cascading effects of power loss… would rapidly challenge the military’s ability to continue operations.”
Also at “high risk of temporary or permanent closure due to climate threats” are US nuclear power facilities.
There are currently 99 nuclear reactors operating in the US, supplying nearly 20 percent of the country’s utility-scale energy. But the majority of these, some 60 percent, are located in vulnerable regions which face “major risks” including sea level rise, severe storms, and water shortages.
The report's authors believe that domestic military operations will be necessary to contain future disease outbreaks. There is no clear timeline for this, except the notion of being prepared for imminent surprises: “Climate change is introducing an increased risk of infectious disease to the US population. It is increasingly not a matter of ‘if’ but of when there will be a large outbreak.”
Areas in the south of the US will see an increase in precipitation of between .5 and .8 mm a day, along with an increase in average annual temperatures of 1 to 3 degrees Celsius (C) by 2050.
Along with warmer winters, these new conditions will drive the proliferation of mosquitos and ticks. This in turn will spur the spread of diseases “which may be previously unseen in the US”, and accelerate the reach of diseases currently found in very small numbers such as Zika, West Nile Virus, Lyme disease, and many others:
“The US Army will be called upon to assist in much the same way it was called upon in other disasters. Detailed coordination with local, state and federal agencies in the most high risk regions will hasten response time and minimize risk to mission.”
A new era of endless war
The new report is especially significant given the Trump administration’s climate science denial. Commissioned by General Mark Milley, now the highest ranking military officer in the United States, the report not only concludes that climate change is real, but that it is on track to create an unprecedented catastrophe that could lead to the total collapse of US society without serious investments in new technology and infrastructure. However, while focusing on projected climate impacts, the report does not discuss the causes of climate change in human fossil fuel emissions.
The report was written by an interdisciplinary team active across several US government agencies, including the White House’s Office of American Innovation, the Secretary of Defense’s Protecting Critical Technology Task Force, NASA’s Harvest Consortium, the US Air Force Headquarters’ Directorate of Weather, the US Army’s National Guard, and the US State Department. The US Army War College did not respond to a request for comment.
Their report not only describes the need for massive permanent military infrastructure on US soil to stave off climate collapse, but portends new foreign interventions due to climate change.
The authors argue that the Syrian civil war could be a taste of future international conflicts triggered by climate-induced unrest. There is “no question that the conflict erupted coincident with a major drought in the region which forced rural people into Syrian cities as large numbers of Iraqi refugees arrived,” they say.
The resulting conflict “reignited civil war in Iraq,” and heightened military tensions between the US and Russia.
“The Syrian population has declined by about 10 percent since the start of the war, with millions of refugees fleeing the nation, increasing instability in Europe, and stoking violent extremism,” the report concludes.
The most urgent case for a potential US intervention, however, is the South Asian country of Bangladesh.
With half its 160 million-strong population currently living at sea level, some 80 million Bangladeshis are set to be displaced as huge areas of the country become “uninhabitable” due to climate impacts: “How will this large scale displacement affect global security in a region with nearly 40 percent of the world’s population and several antagonistic nuclear powers?”
With a population eight times that of Syria’s, the report explains, “permanent displacement of a large portion of the population of Bangladesh would be a regional catastrophe with the potential to increase global instability.”
The authors recommend the US Army work with the State Department and USAID to “strengthen the resilience of [Bangladeshi] government agencies and provide training for the Bangladeshi military.”
Water scarcity will destabilize nations—and the U.S. Army
While sea level rise offers one specific type of risk, another comes from water scarcity due to climate change, population increase, and poor water management. The report describes water scarcity as a near-term risk driving civil unrest and political instability.
By 2040, global demand for fresh water will exceed availability, and by 2030 one-third of the world population will inhabit the “water-stressed regions” of North Africa, Southern Africa, the Middle East, China, and the United States, the report notes.
The decline in water availability over the next two decades will lead to an increase in “social disruption” in poor, vulnerable regions.
Water scarcity is also a driver of possible global food system failure, which could trigger new “outbreaks of civil conflict and social unrest.”
The report depicts a global food system increasingly disrupted by “rapid freeze-thaw cycles in spring and fall, soil degradation, depletion of fossil water aquifers, intensified spread of agricultural pests and diseases, and damage to shipping infrastructure as a consequence of flooding.”
Such food system instability will result in “significant increases in mortality in vulnerable locations, which are those where DoD-supported humanitarian intervention is most likely.”
But foreign military interventions, particularly in water scarce regions of the Middle East and North Africa, might not be viable unless the US Army invents or acquires radical new technologies to distribute adequate levels of water to soldiers.
The problem is so bad and so expensive, the report says, that the Army “is precipitously close to mission failure concerning hydration of the force in a contested arid environment.”
Water is currently 30-40 percent of the costs required to sustain a US military force operating abroad, according to the new Army report. A huge infrastructure is needed to transport bottled water for Army units. So the report recommends major new investments in technology to collect water from the atmosphere locally, without which US military operations abroad could become impossible. The biggest obstacle is that this is currently way outside the Pentagon’s current funding priorities.
Rampaging for Arctic oil
And yet the report’s biggest blind-spot is its agnosticism on the necessity for a rapid whole society transition away from fossil fuels.
Bizarrely for a report styling itself around the promotion of environmental stewardship in the Army, the report identifies the Arctic as a critical strategic location for future US military involvement: to maximize fossil fuel consumption.
Noting that the Arctic is believed to hold about a quarter of the world’s undiscovered hydrocarbon reserves, the authors estimate that some 20 percent of these reserves could be within US territory, noting a “greater potential for conflict” over these resources, particularly with Russia.
The melting of Arctic sea ice is depicted as a foregone conclusion over the next few decades, implying that major new economic opportunities will open up to exploit the region’s oil and gas resources as well as to establish new shipping routes: “The US military must immediately begin expanding its capability to operate in the Artic to defend economic interests and to partner with allies across the region.”
Senior US defense officials in Washington clearly anticipate a prolonged role for the US military, both abroad and in the homeland, as climate change wreaks havoc on critical food, water and power systems. Apart from causing fundamental damage to our already strained democratic systems, the bigger problem is that the US military is by far a foremost driver of climate change by being the world’s single biggest institutional consumer of fossil fuels.
The prospect of an ever expanding permanent role for the Army on US soil to address growing climate change impacts is a surprisingly extreme scenario which goes against the grain of the traditional separation of the US military from domestic affairs.
In putting this forward, the report inadvertently illustrates what happens when climate is seen through a narrow ‘national security’ lens. Instead of encouraging governments to address root causes through “unprecedented changes in all aspects of society” (in the words of the UN’s IPCC report this time last year), the Army report demands more money and power for military agencies while allowing the causes of climate crisis to accelerate. It’s perhaps no surprise that such dire scenarios are predicted, when the solutions that might avert those scenarios aren’t seriously explored.
Rather than waiting for the US military to step in after climate collapse—at which point the military itself could be at risk of collapsing—we would be better off dealing with the root cause of the issue skirted over by this report: America’s chronic dependence on the oil and gas driving the destabilization of the planet’s ecosystems.
This Decade We Became Really, Really Sure Climate Change Is Real
In the last 10 years, our climate models have gotten much better and they all tell us the same thing: We have to act now.
By Maddie Stone - 13. December 2019
In the past ten years, we lost hope in American politics, realized we were being watched on the internet, and finally broke the gender binary (kind of). So many of the beliefs we held to be true at the beginning of the decade have since been proven false—or at least, much more complicated than they once seemed.The Decade of Disillusion is a series that tracks how the hell we got here.
To climate scientist Kathie Dello, the clearest sign that the world had changed was the 2015 drought. As the associate director for the Oregon Climate Change Research Institute, Dello spent that year disseminating climate information to the public as historically warm weather melted mountain snowpack and dried out landscapes across the Pacific Northwest, triggering water scarcity, fueling historic wildfires, and offering a glimpse of what soon could be the new normal.
Dello isn’t the only scientist for whom the potential consequences of life on a warming planet became all too real this past decade. It was a common theme in the recent conversations I had with nearly a dozen scientists to learn how our understanding of climate change has advanced over the last 10 years. While their specific responses were as diverse as the topics these researchers study, a consistent throughline is that while climate change is now manifesting all around us, whether through the mass coral reef die-offs or Greenland melting at rates unprecedented in the last 350 years.
“Everything we thought was happening [at the beginning of the decade] we’re much more confident is happening now,” said Gavin Schmidt, a climate scientist at NASA’s Goddard Institute for Space Studies. “That’s both good and bad.”
On the good side of the ledger, our understanding of climate change has advanced leaps and bounds. Through new satellite missions like the European Space Agency’s Earth-observing Sentinel array, airborne campaigns such as NASA’s cryosphere-monitoring Operation IceBridge, autonomous observatories like the Argo float network collecting oceanographic intel on the high seas, and field research campaigns from Alaska’s tundra to the Amazon rainforest, researchers have collected scores of data that shows how the effects of warming are rippling across diverse environments and ecosystems. Thanks to ongoing advancements in computing power, all of that data is being fed into increasingly sophisticated models to forecast our planet’s future. The big data revolution has also helped spawn a new field of attribution science, which allows researchers to say what kind of a role warming played in a heat wave, wildfire, hurricane, or other extreme event, often in near real-time.
“More and more, we’re able to say yes the following extreme event was influenced by climate change,” said Peter Gleick, a climate and water scientist and co-founder of the Pacific Institute. That, he said, is an advance that’s “absolutely of the last decade.”
But while scientific progress is a good thing, the picture all of this new data and computational capacity paints is a grim one.
The planet has only warmed around a degree so far, but already Arctic sea ice has retreated dramatically, its loss amplifying warming and helping tip parts of the north, like Arctic Alaska, into an entirely new climate state. All that warmth means Greenland is now shedding about 300 billion tons of frozen water into the sea each year, causing sea levels to rise at an accelerating rate. Ice losses across Antarctica are also contributing to that rise and could play a much bigger role in the future; research published this decade found that the Amundsen Sea sector of West Antarctica might have already entered a state of irreversible decline that will raise global sea levels by ten feet.
As low-lying communities glimpse a future of permanent inundation, offshore the buildup of heat is cooking ecosystems to death. From 2014 to 2017, the world’s shallow water coral reefs suffered a global bleaching event, losing the symbiotic algae that give them color and provide them with food thanks to heat stress. Between 2016 and 2017 half of all corals in the Great Barrier Reef died due to bleaching-induced starvation.
“One of the headline stories for this decade has been the pace at which coral reefs are succumbing to heat,” said Kim Cobb, a coral reef scientist who heads the Global Change Program at Georgia Tech. “This has been a very acute wake up call.”
Less headline-grabbing but equally alarming: Warmer ocean water holds less oxygen, a fact of physics that is beginning to manifest everywhere. In 2017, two studies pointed to an ongoing climate change-fueled depletion of oxygen in Earth’s surface oceans. While nobody is sure exactly how bad this will get, history doesn’t bode well: Research published last year suggeststhat global warming-fueled ocean anoxia might have been the chief culprit in the worst mass extinction event life on Earth ever experienced.
“This is a really serious problem,” said Matt Long, an oceanographer at the National Center for Atmospheric Research. “We’re fundamentally changing the metabolic status of the largest ecosystem on Earth, at a rate that’s not well-quantified.”
But it’s on land where the consequences of rapid climate change are becoming most apparent to humans, whether it’s the fires of unprecedented size and intensity tearing across the western U.S. and Australia, the historic downpours from Houston to Bangladesh, vanishing snowpack in the Sierra Nevada, or deadly heat waves in Europe and India. In the high Arctic, the very ground communities have built their homes on is crumbling as once-stable permafrost turns to mush.
To Miami University fire scientist Jessica McCarty, last month’s wildfire near Santa Barbara, California crystallizes how climate change can amplify the threat of disasters: The blaze, which tore across a landscape dried out by intense late-summer heat, was quickly followed by “bomb cyclone” that brought heavy rain and raised the risk of mudslides. In the 2000s, McCarty says, “there was a kind of theorized loop of drought and then these bombogenesis storms that would release a lot of water that would cause landslide risk. Now we just see it—it’s this known thing that we expect.”
There’s plenty of research left to be done. To better project future sea level rise, we need to improve our understanding of how ice sheets melt at their base and how warmer ocean waters eat away at their edges, said Ruth Mottram, a climate scientist and glaciologist at the Danish Meteorological Institute. We also need to get better at modeling clouds, which Mottram described as a “climate scientist’s absolute nightmare” but which play a critical role in how much sunlight reaches the Arctic in the summer. And there are feedback loops and tipping points we’re still uncertain about, like how much future warming we could see due to the slow release of carbon from thawing permafrost or a massive, drought-fueled dieback of the Amazon rainforest.
As a commentary published last month in Nature pointed out, those two feedbacks alone could “all but erase” the carbon budget humanity has left in order to maintain a good chance of capping global warming at the “safe” level of 1.5 degrees Celsius.
“Even if we stopped warming today, that spin up of permafrost thaw is going to contribute” to future emissions, said Merritt Turetsky, an ecosystem ecologist at the University of Guelph in Canada. “Our investments in mitigation today help us scale back these climate tipping points.”
There are also fundamental questions about how much warming future carbon emissions will cause. Worryingly, Schmidt of NASA Goddard says, a number of new flagship climate models are “running hot,” suggesting the climate system may be far more sensitive to increased CO2 than previously thought. As we enter the 2020s, he said, climate science faces a strange contrast of more observations, better attribution science, and “greater uncertainty about what’s going to happen in the future.”
But while there will always be more knowledge to gather and uncertainties to rectify, the scientists I spoke with were clear that puzzling out the details of all the planetary chaos we’re creating won’t change the basic picture, which has been pretty much the same since Exxon was doing climate research in the 1970s.
“We don’t need more information on how critical the situation is,” said Adriane Esquivel-Muelbert, a research fellow studying global change and forests at the University of Birmingham in the UK. “We need to start acting.”
Schmidt thinks it’s unlikely that we’ll be able to bring carbon emission down quickly enough to cap global warming at 1.5 degrees. As the U.N. noted in a recent report noted, to do so we’ll need to cut carbon emissions an unprecedented 7.6 percent every year of the 2020s. (In the 2010s, emissions rose 1.5 percent a year, per the U.N.) At the same time, he and most other scientists I spoke felt more hopeful about climate action today than they did at the beginning of the decade. Despite seemingly endless stalling and entrenched climate denial at the highest levels of government, there’s been a revolution in public awareness and concern over the last few years as the dire effects of warming become impossible to ignore.
Cobb called the U.N.’s 1.5 degree Celsius report last year—which alerted the world that we have about a decade left to slash emissions in order to keep global warming within safe boundaries—“one of the most important advances of the decade” because of how it galvanized the public. And while the progress we’ve made cutting emissions hasn’t kept pace with increasingly loud calls for action, we’re now at least discussing radical decarbonization strategies commensurate with the scale of the problem.
“I feel more positive today about the number of people who are concerned [about climate change], understand that it’s human caused, and that human action will dictate our future,” said Twila Moon, a glaciologist at the National Snow and Ice Data Center in Colorado. But, she added, she’d like to see the conversation move “very strongly” toward figuring out how to meaningfully reduce emissions.
After all, it’s not too late to keep climate change from metastasizing into something far worse. If the 2010s were the decade where warming got real, the 2020s could go down in history as the moment humanity started dial the planetary thermostat down.
Either that, or we’re about to see how bad things can really get.
New, Dire Climate Models Say the Planet Warms Faster Than We Thought
Two new models say the Earth is even more sensitive to emissions than we thought, and humanity has to work even harder to meet Paris agreement targets.
By Madeleine Gregory - 19. September 2019
Two new climate models predict that global warming due to climate change will be faster and more severe than previously thought, meaning humanity will have to work even harder to curb its emissions and meet the warming goals set out in the Paris agreement.
If we continue to use fossil fuels to drive rapid economic growth, the new models say, mean global temperature could rise as much as 7 degrees Celsius by 2100, which is 1 degree higher than previous estimates. In terms of climate change, that’s a lot.
“It is difficult to imagine the impacts of that level of warming,” Olivier Boucher, head of the Climate Modeling Center at the Institut Pierre Simon Laplace in Paris, said in an email. “But there would be dramatic for many natural and human systems. As a comparison, the difference between an ice age and interglacial period is 5 [degrees Celsius].”
These models came out of the Coupled Model Intercomparison Project, part of the World Climate Research Program, and were unveiled at a press conference on Tuesday. The models will be factored in to future Intergovernmental Panel on Climate Change (IPCC) reports in 2021. Currently, the Paris Agreement—which is based on older climate models—wants to cap warming at 2 degrees Celsius.
French scientists from multiple research institutions sorted through a massive amount of data, racking up around 500 million computing hours. The models they came up with predict that the climate will respond faster and more easily to our greenhouse gas emissions than previously assumed. This increase in expected climate response, called “equilibrium climate sensitivity,” means that humanity will need to curb its emissions even more drastically to satisfy the Paris agreement
This research is the latest in a series of new models being created worldwide to better understand our changing climate. The work wasn’t done exclusively by climate scientists. Nearly 100 scientists from numerous disciplines participated in the work, including climatologists, oceanographers, glaciologists, and other specialists.
In addition to global climate patterns, the new research zeroes in on some more local phenomenon (such as heat waves and tropical storms), simulating them more realistically than ever before.
The impacts of the worst-case scenario under the new models (a 7 degree Celsius warming by 2100) are severe, and will likely require more research to accurately predict. But it is estimated that, at about half of that warming, most species would not survive and all summer Arctic ice would disappear.
The countries who signed the Paris agreement pledged to limit global warming to 2 degrees Celsius, a far cry from the worst-case scenario. Even 2 degrees warming above pre-industrial levels will have severe consequences for sea level rise, heat waves, ice melt, and extreme weather events. We haven’t even hit one degree of warming yet, and are already facing record heat waves, intense wildfires, and rapidly melting ice.
In these new models, there is only one socio-economic scenario that limits warming to 2 degrees, and it requires strong international cooperation and investment in sustainable development. Even then, the scenario calls for extreme mitigation efforts, and we will still likely exceed the target at some point in the next century, warming over 2 degrees before cooling down only if drastic geoengineering measures are taken.
"We have to do both adaptation for the warming to be expected, and as much mitigation as possible to be on the best possible path," Boucher said.
In a time when international cooperation is paramount to fighting climate change, Trump is still attempting to pull out of the Paris agreement as soon as he’s able (in November 2020), despite pushback from Congress.
The Paris agreement, which already lacks real regulatory teeth, will need to be strengthened and redefined if we want to avoid more extreme warming scenarios. And then, we actually have to follow through.