Large-Scale Permafrost Thawing

Large-Scale Permafrost Thawing

Robert offers the reader multiple sources of evidence regarding the nature of large-scale permafrost thawing including the impact of the release of greenhouse gases and the potential for a feedback loop.


Large-Scale Permafrost Thawing

Twenty-five percent (25%) of the Northern Hemisphere is permafrost. By all appearances, it is melting well beyond natural background rates, in fact, substantially!

Making matters much, much worse, new research has identified past warming events of large-scale permafrost thaw in the Arctic that may be analogous to today, thus spotting a parallel problem of large-scale thawing accompanied by massively excessive carbon emissions spewing into the atmosphere, like there’s no tomorrow.

Permafrost thawing is not, at all times, simply “thawing.”

Of course, as a standalone, the word “thawing” implies a rather evenly keeled methodical process without any specific definition of scale. But, there’s thawing, and then, there’s “large-scale thawing,” which is kinda like turning loose a behemoth. The results are never pretty.

As global warming powers up, like it’s doing now, it has a penchant for finding enormous spans of frozen mud and silt filled with iced-species in quasi-permanent frozen states known as permafrost. As it melts, it’s full of surprises, some interesting, as well as some that are horribly dangerous, for example, emitting huge quantities of carbon, thus kicking into high gear some level of runaway global warming that threatens to wipeout agriculture.

As a matter of fact, according to the research, no more than a few degrees of warming, only a few, can trigger abrupt thaws of vast frozen land thereby releasing vast quantities of greenhouse gases as a product of collapsing landscapes, and it feeds upon itself. Indeed, the research effort identified “surges in greenhouse gas emissions… on a massive scale,” Ibid.

The study suggests that massive permafrost ecosystem thawing is subject to indeterminate timing sequences, but it’s armed with a “sensitive trigger” abruptly altering the landscape in massive fashion.

In short, an event could arise out of the blue. It’s well known that Arctic permafrost holds considerably more carbon captured in a frozen state than has already been emitted into the atmosphere.

Already, over just the past two years, other field studies have shown instances where thawing permafrost is 70 years ahead of scientists’ models, prompting the thought that thawing may be cranking up even as the Intergovernmental Panel on Climate Change (IPCC) fails to anticipate it.

After all, permafrost is not included in the IPCC’s carbon budget, meaning signatories to the Paris accord of 2015 will need to recalculate their quest to save the world from too much carbon emitting too fast for any kind of smooth functionality of the planet’s climate system. In turn, it undoubtedly negatively impacts the support, or lack thereof, for food-growing regions, which could actually collapse, similar to cascading dominos. Poof!

In the Canadian High Arctic: “Observed maximum thaw depths at our sites are already exceeding those projected to occur by 2090.

According to Susan Natali of Woods Hole Research Center (Massachusetts) the Arctic has already transformed from a carbon sink to a carbon emitter: “Given that the Arctic has been taking up carbon for tens of thousands of years, this shift to a carbon source is important because it highlights a new dynamic in the functioning of the Earth System.”

A 14-year study referenced by Dr. Natali shows annualized 1.66 gigatonnes CO2 emitted from the Arctic versus 1.03 gigatonnes absorbed, a major turning point in paleoclimate history.

A chilling turn for the worse that threatens 10,000 years of our wonderful Holocene era “not too hot, not too cold.” Alas, that spectacular Goldilocks life of perfection is rapidly becoming a remembrance of the past.

Additionally, according to Vladimir Romanovsky – Permafrost Laboratory, Geophysical Institute, University of Alaska, Fairbanks (UAF) there are definitive geophysical signs of permafrost that survived thousands of years now starting to thaw. As stated by Romanovsky: “The new research is yet more evidence that the amplified warming in the Arctic can release carbon at a massive scale.”

Nobody knows how soon such an event will break loose in earnest, but global warming has already penetrated the upper permafrost layers, as cliffs of coastal permafrost are collapsing at an accelerating rate.

In short, the current news about thawing/collapsing permafrost is decidedly negative and a threat to life, as we know it.

The Martens’ study conclusively states: “The results from this study on large-scale OC remobilization from permafrost are consistent with a growing set of observational records from the Arctic Ocean and provide support for modeling studies that simulated large injections of CO2 into the atmosphere during deglaciation. This demonstrates that Arctic warming by only a few degrees may suffice to abruptly activate large-scale permafrost thawing, indicating a sensitive trigger for a threshold-like permafrost climate change feedback.”

Thus, as the Holocene era wanes right before humanity’s eyes, the Anthropocene, the age of humans, stands on the world stage all alone with its own shadow and with ever fewer, and fewer, and fewer vertebrates roaming amongst fields of scorched, blackened plant life. What, or who, will it eat?

According to the Pulitzer Prize-winning author and world-renowned biologist E.O. Wilson:

If we choose the path of destruction, the planet will continue to descend irreversibly into the Anthropocene Epoch, the biologically final age in which the planet exists almost exclusively by, for, and of ourselves.


You can access the full article in its original form here:

Large-Scale Permafrost Thawing

Robert Hunziker lives in Los Angeles and can be reached at rlhunziker@gmail.com.

Arctic Permafrost Infernos

Arctic Permafrost Infernos

Image: Pierre Markuse (Flickr)

Editor’s note: the figures in this article were confirmed using multiple sources, including Grist, the Telegraph, and Inside Climate News. However, the sources are about a week old so the affected areas are probably larger

This summer’s unprecedented temperatures have melted and dried vast regions of arctic permafrost, which have begun igniting and growing into unstoppable wildfires. Russia has been forced to declare a state of emergency because active fires have now expanded to over 12,000 square miles, roughly the size of Belgium, bringing the total affected landmass to over 42,000 square miles this season. These fires are significantly worse than typical forest fires because the burning soil contains significantly more CO2 and the fires will burn for much longer.

A decade ago the phrase “melted permafrost” would have seemed like a contradiction, let alone “permafrost fire.” The definition of permafrost is that it’s not supposed to melt, at least not on human timescales. Now the carbon locked beneath melted permafrost is turning into another feedback loop, a climate system that makes itself worse once triggered; the more heatwaves we encounter the more permafrost fires we’ll experience, those fires contribute to more heatwaves, and so on in a vicious cycle.

These fires are not limited to Russia. Alaska has also experienced over 3,750 square miles of wildire through July. Even Greenland, the land of ice, has witnessed significant wildfires and lost over 197 billion tons of ice in July. These events, among many others, have made 2019 the most extreme year of climate breakdown in human history. Scientists have been forced to revise their models as levels of permafrost melt have already reached levels that were not predicted until 2090. Many climate science “alarmists” appear to have been to conservative in their estimates, an increasingly common theme.

For some people the instinct is to retreat from these horrifying events, to throw their hands up and declare the situation is hopeless and that taking action is futile. Their fear-based response is understandable but it is not acceptable; it makes those people complicit in the nihilistic destruction of life on Earth. We have a moral obligation to take action against the industrial infrastructure that has caused this catastrophe. That struggle against the forces of death is worthwhile, regardless of our personal outcomes, because life is inherently worth defending. The sooner we dismantle industrial civilization, the more species will survive, and the sooner Earth will recover.

Alaska’s Arctic Rivers Turn Rusty Orange

Alaska’s Arctic Rivers Turn Rusty Orange

By Liz Kimbrough / Mongabay

Dozens of once-pristine rivers and streams in Alaska’s Brooks Range are turning an alarming shade of orange. The discoloration, according to a new study published in the journal Communications Earth and Environment, is likely caused by the thawing of permafrost, which is exposing previously frozen minerals that are now leaching into the waterways.

The research team, led by ecologist Jon O’Donnell from the U.S. National Park Service, documented 75 locations across a vast area of northern Alaska where the crystal-clear waters now appear heavily stained. Using satellite imagery and field observations, the scientists determined that the onset of this discoloration coincided with a period of warming and increased snowfall in the region over the past decade.

Permafrost, which is ground that remains frozen year-round, acts as a storage vault for various minerals. As rising temperatures cause this frozen layer to thaw, these minerals are exposed to water and oxygen, triggering chemical reactions that release iron and other metals into the groundwater. This metal-rich water then makes its way into rivers and streams.

“Our recent study highlights an unforeseen consequence of climate change on Arctic rivers,” study co-author Brett Poulin, an environmental toxicologist from the University of California, Davis, told Mongabay. “Arctic environments are warming up to four times faster than the globe as a whole, and this is resulting in deterioration of water quality in the most pristine rivers in North America.”

Map of orange stream observations across Arctic Inventory and Monitoring Network (ARCN) parks in northern Alaska. Picture inserts show aerial images of select iron-impacted, orange streams. Map created by Carson Baughman, U.S. Geological Survey. Photos by Kenneth Hill, National Park Service. Public domain.
Impacts of iron mobilization in a stream tributary of the Akillik River located in Kobuk Valley National Park, Alaska. These images were taken two years apart. The clear picture was taken in June 2016 and the orange picture was August 2018. Photos by Jon O’Donnell, National Park Service.

Water samples collected from the affected streams revealed lower pH levels and higher concentrations of sulfates and trace metals compared to nearby unaffected waterways. In some cases, the pH levels dropped to 2.3, similar to the acidity of vinegar. The presence of elevated levels of iron, zinc, nickel and copper is the primary cause of the color change.

The ecological consequences of this phenomenon could be significant. At one site in Kobuk Valley National Park, researchers observed the disappearance of fish species and a decline in aquatic insect diversity shortly after the appearance of orange water. Juvenile Dolly Varden trout (Salvelinus malma) and slimy sculpin (Cottus cognatus) were among the fish species that vanished from the stream.

“Many of these affected streams serve as important spawning grounds and nurseries for salmon and other fish species that are crucial to the ecosystem and local subsistence fisheries,” study co-author Michael Carey, a fisheries biologist with the U.S. Geological Survey, said in a statement. “Changes in water quality could have effects throughout the food web.”

Human communities in the region also rely on these rivers and streams for their drinking water supply and subsistence fishing. As permafrost thaw accelerates and more minerals are released into the waterways, the safety and reliability of these resources could be impacted. Poulin emphasized the need for further research to understand the long-term implications for humans.

A tributary of the Kugororuk River runs orange in 2023. Photo by Josh Koch, U.S. Geological Survey. Public Domain.

“Our larger research effort aims to identify where the minerals are located that are the source of the metals and identify which rivers are most sensitive,” Poulin said. “With those two pieces of information, we will be able to accurately assess risk to the ecosystem and humans.”

Poulin also highlighted the uniqueness of these observations, noting that while gradual changes in water quality due to permafrost thaw have been documented in other parts of the Arctic and in high elevations of the Rockies and European Alps, the abrupt changes in water chemistry seen in the Brooks Range are particularly concerning.

“The rivers impacted by this phenomenon span the length of the Brooks Range” — about 1,100 kilometers, or 680 miles — “and involve some of the most pristine rivers in North America that are in protected lands and far from mining sources,” Poulin said.

As scientists work to better understand the complex interactions between thawing permafrost, mineral release and aquatic ecosystems, the study underscores the far-reaching consequences of climate change in the Arctic.

Banner image satellite imagery by Ken Hill, U.S. National Park Service.

Liz Kimbrough is a staff journalist for Mongabay. She has written about science and environmental issues since 2012 and holds a Ph.D. in Ecology and Evolutionary Biology from Tulane University where she studied the microbiomes of trees.

the commodification machine

By Mankh / Musings from Between the Lines

“commodify” from modus “measure”

“Number is as fundamental as the other three cardinal metaphors,
space, time, and matter because it is an interrelated aspect of the
divide-and-conquer metaphor which extends and diversifies the primal unity.” – Roger S. Jones, from Physics As Metaphor

where’s the pleasure
when everything’s measured,
and why isn’t water declared
a national treasure,
because everything’s tallied
by numbers in a ledger

monthly bills with
amounts of water,
oil, natural gas, and electricity
the measurement’s diminishing the felicity

it’s mean (literally)
and pretends to be green
the opposite of grist to the mill,
the commodification machine

the commodification machine
with Midas touch
but what you gonna eat
when you touch your burger
and it’s no longer meat

the selfishness is in the word, “mine”
mine for copper, mine for nickel,
mine for lithium, mine for gold
but alchemy is turning cucumber into pickle

grains of sand
and stars in the sky,
too many to count
but at least the stars
they can’t commodify

where’s the pleasure
when everything’s measured,
why isn’t land declared
a national treasure,
because everything’s tallied
by numbers in a ledger

the destruction and deadly side-effects
of divide-and-conquers
proves that disregarding primal unity
is totally bonkers

raindrops, snowflakes,
blades of grass, wildflowers,
too many to count
even with countless hours

it’s mean (literally)
and pretends to be green
the opposite of grist to the mill,
the commodification machine

 

 

 

Methane Emissions Crisis Worse Than Ever Before

Methane Emissions Crisis Worse Than Ever Before

Editor’s notes: Methane(CH4) is the main component of natural gas. The word comes from the Greek methy “wine” + hylē “wood.” However, marketers came up with the term natural gas rather than methane gas to give it a clean, green image. Methane is produced by decaying organic material. Natural sources, such as wetlands, account for roughly 40% of today’s global methane emissions. But the majority comes from human activities, such as farms, landfills, dams and wastewater treatment plants – and fuel production. Oil, gas, and coal together make up about a third of global methane emissions. It can leak anywhere along the supply chain, from the wellhead and processing plant, through pipelines and distribution lines, all the way to the burner of your home’s stove or furnace. Once it reaches the atmosphere, methane’s super heat-trapping properties render it a major agent of warming. Over the last 20 years, methane has caused 85 times more warming than the same amount of carbon dioxide. But methane doesn’t stay in the atmosphere for long. Unlike carbon dioxide, which lingers in the atmosphere for a century or more, methane only sticks around for about a dozen years.

Unlit or inefficient flares are another big source. Some companies routinely burn off excess gas that they can’t easily capture or don’t have the pipeline capacity to transport, but that still releases methane and carbon dioxide into the atmosphere. Global oil and gas operations emitted more methane in 2021 than Canada consumed that entire year, according to IEA estimates.

The only way to keep wetlands carbon in the ground is to quickly reduce and ultimately eliminate greenhouse gas emissions from human activities. Failing to do so will only give global warming a helping hand – as warming thaws wetlands and releases more methane, carbon and nitrogen from ancient stores, thus creating a continuous positive feedback loop. In total, methane is responsible for almost half of the global temperature rises since the industrial era.

The rapid growth in the atmospheric methane burden that began in late 2006 is very different from methane’s past observational record. Atmospheric methane’s unprecedented current growth is similar to ice core methane records during glacial-interglacial “termination” events marking global reorganizations of the planetary climate system.

Civilization, being what it is, cannot stop itself from using technology to mitigate the consequences of technological uses. Since civilization can not, on its own, take the necessary steps to relieve its addiction to modernity, it doubles down with solar panels and wind turbines. They are now looking at ways to geoengineer methane emissions. All in a doomed attempt to find a false solution to an overshoot predicament. This system can not continue, and it will be an outside force that brings it down. When that happens it would be best to have as much of the natural world left as possible.


By Olivia Rosane staff writer for Common Dreams

The number of methane “super-emitters” detected by a satellite company has surged by approximately one-third over the past year, despite pledges from fossil fuel companies to reduce their emissions of the highly potent greenhouse gas.

Stephane Germain, the CEO of methane-tracking company GHGSat, told The Associated Press last month that company satellites had detected around 20,000 oil and gas operations, coal mines, and landfills that spewed 220 pounds of methane per hour since the end of 2023—up from around 15,000 the year before.

“The past year, we’ve detected more emissions than ever before,” Germain said, adding that existing data on methane emissions is only “scratching the surface” of the reality.

GHGSat’s data covers the period since 50 fossil fuel companies pledged to end flaring and reduce methane emissions from their operations to “near zero” by 2030 at the United Nations Climate Change Conference, or COP28, in Dubai.

At the time, more than 320 civil society organizations criticized the pledge and other voluntary commitments as a “dangerous distraction.”

“The only safe and effective way to ‘clean up’ fossil fuel pollution is to phase out fossil fuels,” the groups wrote in an open letter. “Methane emissions and gas flaring are symptoms of a more than century-long legacy of wasteful, destructive practices that are routine in the oil and gas industry as it pursues massive profits without regard for the consequences.”

“That the industry, at this crucial moment in the climate emergency, is offering to clean up its mess around the edges in lieu of the rapid oil and gas phaseout that is needed is an insult to the billions impacted both by climate change and the industry’s appalling legacy of pollution and community health impacts,” they continued.

Yet now it seems as if the industry isn’t even attempting to clean up its mess around the edges.

Germain, who is sharing his company’s data ahead of the next round of climate talks at COP29 in Baku, Azerbaijan, said that nearly half of the methane super-emitters GHGSat detected were oil and gas related. Another third were landfills or waste facilities, and 16% from mining. Geographically, most of the super-emitting sites are in North America and Eurasia.

A methane flare is seen at Pawnee National Grasslands. (Photo: WildEarth Guardians/flickr/cc)

The data comes amid growing concerns about the extent of methane emissions and how they threaten efforts to rapidly reduce greenhouse gas pollution this decade and limit global temperature rise to 1.5°C. Methane is a more powerful greenhouse gas than carbon dioxide—with about 80 times its heat-trapping potential over its first 20 years in the atmosphere—but it also dissipates much more quickly. This means that curbing methane emissions could be an effective near-term part of halting temperature rise.

However, a series of studies published this year show these emissions moving in the wrong direction. A Nature analysis concluded in March that U.S. oil and gas operations were emitting around three times the methane that the U.S. government thought. A Frontiers of Science paper in July found that the growth rate of atmospheric methane concentrations had seen an “abrupt and rapid increase” in the early 2020s, due largely to the fossil fuel industry as well as releases from tropical wetlands.

The danger of methane emissions is one reason that the climate movement has mobilized to stop the buildout of liquefied natural gas (LNG) infrastructure, as methane routinely leaks in the process of drilling for and transporting the fuel. A September study found that, despite industry claims it could act as a bridge fuel, LNG actually has a 33%. greater greenhouse gas footprint than coal when its entire lifecycle is taken into account.

The fate of the LNG buildout, at least in the U.S., could be decided by the outcome of the 2024 presidential election. The Biden-Harris administration paused the approval of new LNG exports while the Department of Energy considers the latest climate science. While a Trump-appointed judge then halted the pause, this does not actually stop the DOE from continuing its analysis. A second Trump administration, however, would be almost guaranteed not to look further into the risk of methane emissions before it approves more LNG exports. Former President Donald Trump has promised to “drill, baby, drill” and offered a policy wishlist to fossil fuel executives who back his campaign.

A document leaked in October showed that a major oil and gas trade association had drafted plans for a second Trump administration, including ending Biden administration regulations to curb methane emissions, such as an emissions fee.

As Mattea Mrkusic, a senior energy transition policy lead at Evergreen Action, warned, “Under Trump, we could double down on even more dirty fossil fuel infrastructure that’ll lock us into harmful pollution for decades to come.”

Banner Image by Carl Young via Wikimedia Commons (CC BY-SA 4.0).

Top Scientists: We Face “A Ghastly Future”

Top Scientists: We Face “A Ghastly Future”

Editor’s note: According to the scientists who wrote the following paper, “future environmental conditions will be far more dangerous than currently believed. The scale of the threats to the biosphere and all its lifeforms—including humanity—is in fact so great that it is difficult to grasp for even well-informed experts.”

We agree, and have been working to both inform people about these issues and to resist the destruction of the planet since our organization formed over a decade ago. “Any else [other than telling the truth about our ecological crisis] is misleading at best,” the scientists write, “or negligent and potentially lethal for the human enterprise [and, we must add, much of life on this planet] at worst.”

Modern civilization is a society of the spectacle in which media corporations focus more on who won the football game or how the queen is buried than about the breakdown of planetary ecology. This scientific report is essential reading and should be a headline news story worldwide. However, this information is inherently subversive, and therefore is either ignored or framed in such a way as to support the goals of the wealthy.

For years, our co-founder Derrick Jensen has asked his audiences, “Do you think this culture will undergo a voluntary transformation to a sane and sustainable way of life?” No one ever says yes. This is why Deep Green Resistance exists.

Deep Green Resistance starts where the environmental movement leaves off: industrial civilization is incompatible with life. Technology can’t fix it, and shopping—no matter how green—won’t stop it. To save this planet, we need a serious resistance movement that can bring down the industrial economy. Deep Green Resistance is a plan of action for anyone determined to fight for this planet—and win.


Underestimating the Challenges of Avoiding a Ghastly Future

PERSPECTIVE article Frontiers in Conservation Science, 13 January 2021 Section Global Biodiversity Threats https://doi.org/10.3389/fcosc.2020.615419

By Bradshaw, Ehrlich, Beattie, Ceballos, Crist, Diamond, Dirzo, Ehrlich, Harte, Harte, Pyke, Raven, Ripple, Saltré, Turnbull, Wackernagel, and Blumstein

We report three major and confronting environmental issues that have received little attention and require urgent action. First, we review the evidence that future environmental conditions will be far more dangerous than currently believed. The scale of the threats to the biosphere and all its lifeforms—including humanity—is in fact so great that it is difficult to grasp for even well-informed experts. Second, we ask what political or economic system, or leadership, is prepared to handle the predicted disasters, or even capable of such action. Third, this dire situation places an extraordinary responsibility on scientists to speak out candidly and accurately when engaging with government, business, and the public. We especially draw attention to the lack of appreciation of the enormous challenges to creating a sustainable future. The added stresses to human health, wealth, and well-being will perversely diminish our political capacity to mitigate the erosion of ecosystem services on which society depends. The science underlying these issues is strong, but awareness is weak. Without fully appreciating and broadcasting the scale of the problems and the enormity of the solutions required, society will fail to achieve even modest sustainability goals.

Introduction

Humanity is causing a rapid loss of biodiversity and, with it, Earth’s ability to support complex life. But the mainstream is having difficulty grasping the magnitude of this loss, despite the steady erosion of the fabric of human civilization (Ceballos et al., 2015; IPBES, 2019; Convention on Biological Diversity, 2020; WWF, 2020). While suggested solutions abound (Díaz et al., 2019), the current scale of their implementation does not match the relentless progression of biodiversity loss (Cumming et al., 2006) and other existential threats tied to the continuous expansion of the human enterprise (Rees, 2020). Time delays between ecological deterioration and socio-economic penalties, as with climate disruption for example (IPCC, 2014), impede recognition of the magnitude of the challenge and timely counteraction needed. In addition, disciplinary specialization and insularity encourage unfamiliarity with the complex adaptive systems (Levin, 1999) in which problems and their potential solutions are embedded (Selby, 2006; Brand and Karvonen, 2007). Widespread ignorance of human behavior (Van Bavel et al., 2020) and the incremental nature of socio-political processes that plan and implement solutions further delay effective action (Shanley and López, 2009; King, 2016).

We summarize the state of the natural world in stark form here to help clarify the gravity of the human predicament. We also outline likely future trends in biodiversity decline (Díaz et al., 2019), climate disruption (Ripple et al., 2020), and human consumption and population growth to demonstrate the near certainty that these problems will worsen over the coming decades, with negative impacts for centuries to come. Finally, we discuss the ineffectiveness of current and planned actions that are attempting to address the ominous erosion of Earth’s life-support system. Ours is not a call to surrender—we aim to provide leaders with a realistic “cold shower” of the state of the planet that is essential for planning to avoid a ghastly future.

Biodiversity Loss

Major changes in the biosphere are directly linked to the growth of human systems (summarized in Figure 1). While the rapid loss of species and populations differs regionally in intensity (Ceballos et al., 2015, 2017, 2020; Díaz et al., 2019), and most species have not been adequately assessed for extinction risk (Webb and Mindel, 2015), certain global trends are obvious. Since the start of agriculture around 11,000 years ago, the biomass of terrestrial vegetation has been halved (Erb et al., 2018), with a corresponding loss of >20% of its original biodiversity (Díaz et al., 2019), together denoting that >70% of the Earth’s land surface has been altered by Homo sapiens (IPBES, 2019). There have been >700 documented vertebrate (Díaz et al., 2019) and ~600 plant (Humphreys et al., 2019) species extinctions over the past 500 years, with many more species clearly having gone extinct unrecorded (Tedesco et al., 2014). Population sizes of vertebrate species that have been monitored across years have declined by an average of 68% over the last five decades (WWF, 2020), with certain population clusters in extreme decline (Leung et al., 2020), thus presaging the imminent extinction of their species (Ceballos et al., 2020). Overall, perhaps 1 million species are threatened with extinction in the near future out of an estimated 7–10 million eukaryotic species on the planet (Mora et al., 2011), with around 40% of plants alone considered endangered (Antonelli et al., 2020). Today, the global biomass of wild mammals is <25% of that estimated for the Late Pleistocene (Bar-On et al., 2018), while insects are also disappearing rapidly in many regions (Wagner, 2020; reviews in van Klink et al., 2020).

FIGURE 1

www.frontiersin.org

Figure 1. Summary of major environmental-change categories expressed as a percentage change relative to the baseline given in the text. Red indicates the percentage of the category that is damaged, lost, or otherwise affected, whereas blue indicates the percentage that is intact, remaining, or otherwise unaffected. Superscript numbers indicate the following references: 1IPBES, 2019; 2Halpern et al., 2015; 3Krumhansl et al., 2016; 4Waycott et al., 2009; 5Díaz et al., 2019; 6Christensen et al., 2014; 7Frieler et al., 2013; 8Erb et al., 2018; 9Davidson, 2014; 10Grill et al., 2019; 11WWF, 2020; 12Bar-On et al., 2018; 13Antonelli et al., 2020; 14Mora et al., 2011.

Freshwater and marine environments have also been severely damaged. Today there is <15% of the original wetland area globally than was present 300 years ago (Davidson, 2014), and >75% of rivers >1,000 km long no longer flow freely along their entire course (Grill et al., 2019). More than two-thirds of the oceans have been compromised to some extent by human activities (Halpern et al., 2015), live coral cover on reefs has halved in <200 years (Frieler et al., 2013), seagrass extent has been decreasing by 10% per decade over the last century (Waycott et al., 2009; Díaz et al., 2019), kelp forests have declined by ~40% (Krumhansl et al., 2016), and the biomass of large predatory fishes is now <33% of what it was last century (Christensen et al., 2014).

With such a rapid, catastrophic loss of biodiversity, the ecosystem services it provides have also declined. These include inter alia reduced carbon sequestration (Heath et al., 2005; Lal, 2008), reduced pollination (Potts et al., 2016), soil degradation (Lal, 2015), poorer water and air quality (Smith et al., 2013), more frequent and intense flooding (Bradshaw et al., 2007; Hinkel et al., 2014) and fires (Boer et al., 2020; Bowman et al., 2020), and compromised human health (Díaz et al., 2006; Bradshaw et al., 2019). As telling indicators of how much biomass humanity has transferred from natural ecosystems to our own use, of the estimated 0.17 Gt of living biomass of terrestrial vertebrates on Earth today, most is represented by livestock (59%) and human beings (36%)—only ~5% of this total biomass is made up by wild mammals, birds, reptiles, and amphibians (Bar-On et al., 2018). As of 2020, the overall material output of human endeavor exceeds the sum of all living biomass on Earth (Elhacham et al., 2020).

Sixth Mass Extinction

A mass extinction is defined as a loss of ~75% of all species on the planet over a geologically short interval—generally anything <3 million years (Jablonski et al., 1994; Barnosky et al., 2011). At least five major extinction events have occurred since the Cambrian (Sodhi et al., 2009), the most recent of them 66 million years ago at the close of the Cretaceous period. The background rate of extinction since then has been 0.1 extinctions million species−1 year−1 (Ceballos et al., 2015), while estimates of today’s extinction rate are orders of magnitude greater (Lamkin and Miller, 2016). Recorded vertebrate extinctions since the 16th century—the mere tip of the true extinction iceberg—give a rate of extinction of 1.3 species year−1, which is conservatively >15 times the background rate (Ceballos et al., 2015). The IUCN estimates that some 20% of all species are in danger of extinction over the next few decades, which greatly exceeds the background rate. That we are already on the path of a sixth major extinction is now scientifically undeniable (Barnosky et al., 2011; Ceballos et al., 2015, 2017).

Ecological Overshoot: Population Size and Overconsumption

The global human population has approximately doubled since 1970, reaching nearly 7.8 billion people today (prb.org). While some countries have stopped growing and even declined in size, world average fertility continues to be above replacement (2.3 children woman−1), with an average of 4.8 children woman−1 in Sub-Saharan Africa and fertilities >4 children woman−1 in many other countries (e.g., Afghanistan, Yemen, Timor-Leste). The 1.1 billion people today in Sub-Saharan Africa—a region expected to experience particularly harsh repercussions from climate change (Serdeczny et al., 2017)—is projected to double over the next 30 years. By 2050, the world population will likely grow to ~9.9 billion (prb.org), with growth projected by many to continue until well into the next century (Bradshaw and Brook, 2014; Gerland et al., 2014), although more recent estimates predict a peak toward the end of this century (Vollset et al., 2020).

Large population size and continued growth are implicated in many societal problems. The impact of population growth, combined with an imperfect distribution of resources, leads to massive food insecurity. By some estimates, 700–800 million people are starving and 1–2 billion are micronutrient-malnourished and unable to function fully, with prospects of many more food problems in the near future (Ehrlich and Harte, 2015a,b). Large populations and their continued growth are also drivers of soil degradation and biodiversity loss (Pimm et al., 2014). More people means that more synthetic compounds and dangerous throw-away plastics (Vethaak and Leslie, 2016) are manufactured, many of which add to the growing toxification of the Earth (Cribb, 2014). It also increases chances of pandemics (Daily and Ehrlich, 1996b) that fuel ever-more desperate hunts for scarce resources (Klare, 2012). Population growth is also a factor in many social ills, from crowding and joblessness, to deteriorating infrastructure and bad governance (Harte, 2007). There is mounting evidence that when populations are large and growing fast, they can be the sparks for both internal and international conflicts that lead to war (Klare, 2001; Toon et al., 2007). The multiple, interacting causes of civil war in particular are varied, including poverty, inequality, weak institutions, political grievance, ethnic divisions, and environmental stressors such as drought, deforestation, and land degradation (Homer-Dixon, 1991, 1999; Collier and Hoeer, 1998; Hauge and llingsen, 1998; Fearon and Laitin, 2003; Brückner, 2010; Acemoglu et al., 2017). Population growth itself can even increase the probability of military involvement in conflicts (Tir and Diehl, 1998). Countries with higher population growth rates experienced more social conflict since the Second World War (Acemoglu et al., 2017). In that study, an approximate doubling of a country’s population caused about four additional years of full-blown civil war or low-intensity conflict in the 1980s relative to the 1940–1950s, even after controlling for a country’s income-level, independence, and age structure.

Simultaneous with population growth, humanity’s consumption as a fraction of Earth’s regenerative capacity has grown from ~ 73% in 1960 to 170% in 2016 (Lin et al., 2018), with substantially greater per-person consumption in countries with highest income. With COVID-19, this overshoot dropped to 56% above Earth’s regenerative capacity, which means that between January and August 2020, humanity consumed as much as Earth can renew in the entire year (overshootday.org). While inequality among people and countries remains staggering, the global middle class has grown rapidly and exceeded half the human population by 2018 (Kharas and Hamel, 2018). Over 70% of all people currently live in countries that run a biocapacity deficit while also having less than world-average income, excluding them from compensating their biocapacity deficit through purchases (Wackernagel et al., 2019) and eroding future resilience via reduced food security (Ehrlich and Harte, 2015b). The consumption rates of high-income countries continue to be substantially higher than low-income countries, with many of the latter even experiencing declines in per-capita footprint (Dasgupta and Ehrlich, 2013; Wackernagel et al., 2019).

This massive ecological overshoot is largely enabled by the increasing use of fossil fuels. These convenient fuels have allowed us to decouple human demand from biological regeneration: 85% of commercial energy, 65% of fibers, and most plastics are now produced from fossil fuels. Also, food production depends on fossil-fuel input, with every unit of food energy produced requiring a multiple in fossil-fuel energy (e.g., 3 × for high-consuming countries like Canada, Australia, USA, and China; overshootday.org). This, coupled with increasing consumption of carbon-intensive meat (Ripple et al., 2014) congruent with the rising middle class, has exploded the global carbon footprint of agriculture. While climate change demands a full exit from fossil-fuel use well before 2050, pressures on the biosphere are likely to mount prior to decarbonization as humanity brings energy alternatives online. Consumption and biodiversity challenges will also be amplified by the enormous physical inertia of all large “stocks” that shape current trends: built infrastructure, energy systems, and human populations.

It is therefore also inevitable that aggregate consumption will increase at least into the near future, especially as affluence and population continue to grow in tandem (Wiedmann et al., 2020). Even if major catastrophes occur during this interval, they would unlikely affect the population trajectory until well into the 22nd Century (Bradshaw and Brook, 2014). Although population-connected climate change (Wynes and Nicholas, 2017) will worsen human mortality (Mora et al., 2017; Parks et al., 2020), morbidity (Patz et al., 2005; Díaz et al., 2006; Peng et al., 2011), development (Barreca and Schaller, 2020), cognition (Jacobson et al., 2019), agricultural yields (Verdin et al., 2005; Schmidhuber and Tubiello, 2007; Brown and Funk, 2008; Gaupp et al., 2020), and conflicts (Boas, 2015), there is no way—ethically or otherwise (barring extreme and unprecedented increases in human mortality)—to avoid rising human numbers and the accompanying overconsumption. That said, instituting human-rights policies to lower fertility and reining in consumption patterns could diminish the impacts of these phenomena (Rees, 2020).

Failed International Goals and Prospects for the Future

Stopping biodiversity loss is nowhere close to the top of any country’s priorities, trailing far behind other concerns such as employment, healthcare, economic growth, or currency stability. It is therefore no surprise that none of the Aichi Biodiversity Targets for 2020 set at the Convention on Biological Diversity’s (CBD.int) 2010 conference was met (Secretariat of the Convention on Biological Diversity, 2020). Even had they been met, they would have still fallen short of realizing any substantive reductions in extinction rate. More broadly, most of the nature-related United Nations Sustainable Development Goals (SDGs) (e.g., SDGs 6, 13–15) are also on track for failure (Wackernagel et al., 2017; Díaz et al., 2019; Messerli et al., 2019), largely because most SDGs have not adequately incorporated their interdependencies with other socio-economic factors (Bradshaw and Di Minin, 2019; Bradshaw et al., 2019; Messerli et al., 2019). Therefore, the apparent paradox of high and rising average standard of living despite a mounting environmental toll has come at a great cost to the stability of humanity’s medium- and long-term life-support system. In other words, humanity is running an ecological Ponzi scheme in which society robs nature and future generations to pay for boosting incomes in the short term (Ehrlich et al., 2012). Even the World Economic Forum, which is captive of dangerous greenwashing propaganda (Bakan, 2020), now recognizes biodiversity loss as one of the top threats to the global economy (World Economic Forum, 2020).

The emergence of a long-predicted pandemic (Daily and Ehrlich, 1996a), likely related to biodiversity loss, poignantly exemplifies how that imbalance is degrading both human health and wealth (Austin, 2020; Dobson et al., 2020; Roe et al., 2020). With three-quarters of new infectious diseases resulting from human-animal interactions, environmental degradation via climate change, deforestation, intensive farming, bushmeat hunting, and an exploding wildlife trade mean that the opportunities for pathogen-transferring interactions are high (Austin, 2020; Daszak et al., 2020). That much of this degradation is occurring in Biodiversity Hotspots where pathogen diversity is also highest (Keesing et al., 2010), but where institutional capacity is weakest, further increases the risk of pathogen release and spread (Austin, 2020; Schmeller et al., 2020).

Climate Disruption

The dangerous effects of climate change are much more evident to people than those of biodiversity loss (Legagneux et al., 2018), but society is still finding it difficult to deal with them effectively. Civilization has already exceeded a global warming of ~ 1.0°C above pre-industrial conditions, and is on track to cause at least a 1.5°C warming between 2030 and 2052 (IPCC, 2018). In fact, today’s greenhouse-gas concentration is >500 ppm CO2-e (Butler and Montzka, 2020), while according to the IPCC, 450 ppm CO2-e would give Earth a mere 66% chance of not exceeding a 2°C warming (IPCC, 2014). Greenhouse-gas concentration will continue to increase (via positive feedbacks such as melting permafrost and the release of stored methane) (Burke et al., 2018), resulting in further delay of temperature-reducing responses even if humanity stops using fossil fuels entirely well before 2030 (Steffen et al., 2018).

Human alteration of the climate has become globally detectable in any single day’s weather (Sippel et al., 2020). In fact, the world’s climate has matched or exceeded previous predictions (Brysse et al., 2013), possibly because of the IPCC’s reliance on averages from several models (Herger et al., 2018) and the language of political conservativeness inherent in policy recommendations seeking multinational consensus (Herrando-Pérez et al., 2019). However, the latest climate models (CMIP6) show greater future warming than previously predicted (Forster et al., 2020), even if society tracks the needed lower-emissions pathway over the coming decades. Nations have in general not met the goals of the 5 year-old Paris Agreement (United Nations, 2016), and while global awareness and concern have risen, and scientists have proposed major transformative change (in energy production, pollution reduction, custodianship of nature, food production, economics, population policies, etc.), an effective international response has yet to emerge (Ripple et al., 2020). Even assuming that all signatories do, in fact, manage to ratify their commitments (a doubtful prospect), expected warming would still reach 2.6–3.1°C by 2100 (Rogelj et al., 2016) unless large, additional commitments are made and fulfilled. Without such commitments, the projected rise of Earth’s temperature will be catastrophic for biodiversity (Urban, 2015; Steffen et al., 2018; Strona and Bradshaw, 2018) and humanity (Smith et al., 2016).

Regarding international climate-change accords, the Paris Agreement (United Nations, 2016) set the 1.5–2°C target unanimously. But since then, progress to propose, let alone follow, (voluntary) “intended national determined contributions” for post-2020 climate action have been utterly inadequate.

Political Impotence

If most of the world’s population truly understood and appreciated the magnitude of the crises we summarize here, and the inevitability of worsening conditions, one could logically expect positive changes in politics and policies to match the gravity of the existential threats. But the opposite is unfolding. The rise of right-wing populist leaders is associated with anti-environment agendas as seen recently for example in Brazil (Nature, 2018), the USA (Hejny, 2018), and Australia (Burck et al., 2019). Large differences in income, wealth, and consumption among people and even among countries render it difficult to make any policy global in its execution or effect.

A central concept in ecology is density feedback (Herrando-Pérez et al., 2012)—as a population approaches its environmental carrying capacity, average individual fitness declines (Brook and Bradshaw, 2006). This tends to push populations toward an instantaneous expression of carrying capacity that slows or reverses population growth. But for most of history, human ingenuity has inflated the natural environment’s carrying capacity for us by developing new ways to increase food production (Hopfenberg, 2003), expand wildlife exploitation, and enhance the availability of other resources. This inflation has involved modifying temperature via shelter, clothing, and microclimate control, transporting goods from remote locations, and generally reducing the probability of death or injury through community infrastructure and services (Cohen, 1995). But with the availability of fossil fuels, our species has pushed its consumption of nature’s goods and services much farther beyond long-term carrying capacity (or more precisely, the planet’s biocapacity), making the readjustment from overshoot that is inevitable far more catastrophic if not managed carefully (Nyström et al., 2019). A growing human population will only exacerbate this, leading to greater competition for an ever-dwindling resource pool. The corollaries are many: continued reduction of environmental intactness (Bradshaw et al., 2010; Bradshaw and Di Minin, 2019), reduced child health (especially in low-income nations) (Bradshaw et al., 2019), increased food demand exacerbating environmental degradation via agro-intensification (Crist et al., 2017), vaster and possibly catastrophic effects of global toxification (Cribb, 2014; Swan and Colino, 2021), greater expression of social pathologies (Levy and Herzog, 1974) including violence exacerbated by climate change and environmental degradation itself (Agnew, 2013; White, 2017, 2019), more terrorism (Coccia, 2018), and an economic system even more prone to sequester the remaining wealth among fewer individuals (Kus, 2016; Piketty, 2020) much like how cropland expansion since the early 1990s has disproportionately concentrated wealth among the super-rich (Ceddia, 2020). The predominant paradigm is still one of pegging “environment” against “economy”; yet in reality, the choice is between exiting overshoot by design or disaster—because exiting overshoot is inevitable one way or another.

Given these misconceptions and entrenched interests, the continued rise of extreme ideologies is likely, which in turn limits the capacity of making prudent, long-term decisions, thus potentially accelerating a vicious cycle of global ecological deterioration and its penalties. Even the USA’s much-touted New Green Deal (U. S. House of Representatives, 2019) has in fact exacerbated the country’s political polarization (Gustafson et al., 2019), mainly because of the weaponization of ‘environmentalism’ as a political ideology rather than being viewed as a universal mode of self-preservation and planetary protection that ought to transcend political tribalism. Indeed, environmental protest groups are being labeled as “terrorists” in many countries (Hudson, 2020). Further, the severity of the commitments required for any country to achieve meaningful reductions in consumption and emissions will inevitably lead to public backlash and further ideological entrenchments, mainly because the threat of potential short-term sacrifices is seen as politically inopportune. Even though climate change alone will incur a vast economic burden (Burke et al., 2015; Carleton and Hsiang, 2016; Auffhammer, 2018) possibly leading to war (nuclear, or otherwise) at a global scale (Klare, 2020), most of the world’s economies are predicated on the political idea that meaningful counteraction now is too costly to be politically palatable. Combined with financed disinformation campaigns in a bid to protect short-term profits (Oreskes and Conway, 2010; Mayer, 2016; Bakan, 2020), it is doubtful that any needed shift in economic investments of sufficient scale will be made in time.

While uncertain and prone to fluctuate according to unpredictable social and policy trends (Boas et al., 2019; McLeman, 2019; Nature Climate Change, 2019), climate change and other environmental pressures will trigger more mass migration over the coming decades (McLeman, 2019), with an estimated 25 million to 1 billion environmental migrants expected by 2050 (Brown, 2008). Because international law does not yet legally recognize such “environmental migrants” as refugees (United Nations University, 2015) (although this is likely to change) (Lyons, 2020), we fear that a rising tide of refugees will reduce, not increase, international cooperation in ways that will further weaken our capacity to mitigate the crisis.

Changing the Rules of the Game

While it is neither our intention nor capacity in this short Perspective to delve into the complexities and details of possible solutions to the human predicament, there is no shortage of evidence-based literature proposing ways to change human behavior for the benefit of all extant life. The remaining questions are less about what to do, and more about how, stimulating the genesis of many organizations devoted to these pursuits (e.g., ipbes.org, goodanthropocenes.net, overshootday.org, mahb.stanford.edu, populationmatters.org, clubofrome.org, steadystate.org, to name a few). The gravity of the situation requires fundamental changes to global capitalism, education, and equality, which include inter alia the abolition of perpetual economic growth, properly pricing externalities, a rapid exit from fossil-fuel use, strict regulation of markets and property acquisition, reigning in corporate lobbying, and the empowerment of women. These choices will necessarily entail difficult conversations about population growth and the necessity of dwindling but more equitable standards of living.

Conclusions

We have summarized predictions of a ghastly future of mass extinction, declining health, and climate-disruption upheavals (including looming massive migrations) and resource conflicts this century. Yet, our goal is not to present a fatalist perspective, because there are many examples of successful interventions to prevent extinctions, restore ecosystems, and encourage more sustainable economic activity at both local and regional scales. Instead, we contend that only a realistic appreciation of the colossal challenges facing the international community might allow it to chart a less-ravaged future. While there have been more recent calls for the scientific community in particular to be more vocal about their warnings to humanity (Ripple et al., 2017; Cavicchioli et al., 2019; Gardner and Wordley, 2019), these have been insufficiently foreboding to match the scale of the crisis. Given the existence of a human “optimism bias” that triggers some to underestimate the severity of a crisis and ignore expert warnings, a good communication strategy must ideally undercut this bias without inducing disproportionate feelings of fear and despair (Pyke, 2017; Van Bavel et al., 2020). It is therefore incumbent on experts in any discipline that deals with the future of the biosphere and human well-being to eschew reticence, avoid sugar-coating the overwhelming challenges ahead and “tell it like it is.” Anything else is misleading at best, or negligent and potentially lethal for the human enterprise at worst.


Originally published in Frontiers in Conservation Science. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).