This article was written by BYROBERT HUNZIKER and originally published in CounterPunch on OCTOBER 20, 2020. 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.
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:
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.
Water seems deceptively simple and is easy to take for granted. It has no color, taste or smell and is one of the most plentiful chemical compounds on Earth. Recycled endlessly through the biosphere in its various forms, it is fundamental to keeping our planet’s operating system intact, and has done so for millions of years.
Water is life. Earth’s oceans are where life likely originated, and freshwater is essential for plants and animals to persist and thrive. It is basic to all human development. But as our 21st-century world gallops ahead, we are vastly manipulating the water cycle at an unprecedented rate and scale to meet the ever-growing needs of an exploding population.
By 2030, we will have built enough dams to alter 93% of the world’s rivers. Estimates vary, but we already use around 90% of the planet’s freshwater to grow our food. More than half of us now live in cities, but by 2050 a projected 68% of the world’s nearly 8 billion people will reside in urban areas. That metropolitan lifestyle will require astronomical amounts of water — extracted, treated, and piped over large distances. Humanity also prevents much rainwater from easily infiltrating underground, reducing aquifers, as we pave over immense areas with impermeable concrete and asphalt.
But these easily visible changes are only the proverbial tip of the iceberg. Researchers are shining new light on sweeping human alterations to Earth’s water cycle, many playing out in processes largely unseen. In the Anthropocene — the unofficial name for the current human-influenced unit of geologic time — we are already pushing one of Earth’s most fundamental and foundational systems, the hydrological cycle, toward the breaking point.
Trouble is, we don’t yet know when this threshold may be reached, or what the precise consequences will be. Scientists are resolutely seeking answers.
Water flows past Copenhagen in Denmark. As Earth’s urban areas expand, so do population pressures on the freshwater supply and the water cycle. Image by Petro Kotzé.
Water cycle basics
The hydrological cycle is powered by the sun and flows through eternal inhalations and exhalations of water in different states, as it is exchanged between the atmosphere and the planet. Liquid water from oceans, lakes and rivers rises via evaporation into the sky, to form water vapor, an important greenhouse gas that, like carbon dioxide, helps insulate the planet to maintain that “just right” temperature to maintain life as we know it.
Atmospheric water vapor then changes to liquid, falling to earth as precipitation. It then flows as runoff again across the landscape, and what doesn’t go back into waterbodies, settles into soils, to be taken up by plants and released via transpiration as vapor skyward. A large amount of freshwater is also locked in glaciers and icecaps.
Within this cycle, there are constant complex interactions between what scientists call blue and green water. Blue water includes rivers, lakes, reservoirs and renewable groundwater stores. Green water is defined as terrestrial precipitation, evaporation and soil moisture.
Partitioning of rainwater into green and blue water flows. Image by Geertsma et al. (2009)/Baseline Review for the Pilot Programme in Kenya. Green Water Credits Report 8, ISRIC–World Soil Information, Wageningen.
A fully functioning hydrological cycle, with balanced supplies and flows of blue and green water, is essential to terrestrial and aquatic ecosystems, human food availability and production, and our energy security.
It also regulates Earth’s weather and influences climate. Atmospheric temperature, for example, is dependent on evaporation and condensation. That’s because as water evaporates, it absorbs energy and cools the local environment, and as it condenses, it releases energy and warms the world. Throughout the Holocene geological epoch, a relatively stable water cycle helped maintain balanced temperatures and conditions able to support civilization.
However, in the Anthropocene, human activity has impacted the water cycle, the climate and ecosystems. For one, as more human-produced CO2 and methane build up in the atmosphere, more solar energy is held by the planet, causing global warming. And the hotter the air, the greater the quantity of water vapor the atmosphere can hold. That’s bad news because water vapor is itself a powerful greenhouse gas, greatly increasing the warming.
As our anthropogenic manipulation of the water cycle escalates on a global scale, we urgently need a holistic way to monitor these modifications and understand their impacts. Yet, the topic has not received the urgent scientific attention it requires. “To the best of our knowledge, there is no study comprehensively investigating whether human modifications of the water cycle have led, could be leading, or will lead to planetary‐scale regime shifts in the Earth system,” researchers noted in a 2020 paper on the role of the water cycle in maintaining fundamental Earth functioning.
One key concern of scientists: If severe hydrological shifts occur in too many regions, or in key regions that greatly influence the water cycle or water availability (such as the Amazon), then that could provoke shifts in other regions, in a global chain reaction, says study co-author Dieter Gerten, working group leader and Earth modeling coordinator at the Potsdam Institute for Climate Impact Research in Germany.
“Conceptually we know that there must be a limit for how much we can disturb the [hydrological] system before we start feeling serious impacts on the Earth system and then, by extension, to humanity,” says one of the paper’s other co-authors, Miina Porkka, a postdoctoral researcher at the Water and Development Group at Aalto University in Finland.
International researchers under the auspices of the Stockholm Resilience Centre have been hammering away at answering these questions. They had to start with the basics. One big problem to date has been scientists’ lack of a metric for quantifying serious water cycle alterations. How do we even measure changes to the water cycle?
“It gets complicated,” says Gerten, who has been involved in the research to bring a global perspective to local water management since 2009, as conducted under the Planetary Boundaries Framework; Gerten is also a professor of global change climatology and hydrology at Humboldt University of Berlin.
The Toktogul reservoir in Kyrgyzstan. The Anthropocene is producing wholesale manipulations to Earth’s water cycle. For example, by 2030, more than 90% of the world’s rivers will likely be altered by dams. Image by Petro Kotzé.
Measuring change: Blue water
The Planetary Boundaries Framework defines a safe operating space for humanity as represented by nine natural global processes that, if severely destabilized, could disrupt Earth’s operating system and threaten life and civilization. The freshwater planetary boundary presents one such threshold, and scientists are working to define a global limit to anthropogenic water cycle modifications.
Initially, in 2009, river flow was used to try and measure the boundary threshold, Gerten explains, because blue water in all its forms was seen to integrate the three largest anthropogenic manipulations of the water cycle: human impacts on precipitation patterns, modifications of soil moisture by land use and land cover; and water withdrawals for human use.
This research used a simple calculation of the global sum of the average annual surface water flow in rivers, with an assumed 30% of that accessible water needing to be protected. This “freshwater use” boundary was set at 4,000 cubic kilometers (960 cubic miles) per year of blue water consumption. This is at the lower limit of a 4,000-6,000 km3 (960-1,440 mi3) annual range designated as a danger zone that takes us “too close to the risk of blue and green water-induced thresholds that could have deleterious or even catastrophic impacts on the Earth System,” researchers wrote in a 2020 paper that evaluated the water planetary boundary.
The Padysha-Ata River in Kyrgyzstan. Blue water includes rivers as well as lakes, reservoirs, and renewable groundwater stores. Image by Petro Kotzé.
With only an estimated 2,600 km3 (624 mi3) of water withdrawn annually at the time of the study, scientists concluded we were still in the safe zone. However, “That [conclusion] was immediately criticized,” Gerten says, in part because scientists were already seeing ample regional water-related problems. Another criticism argued that the measure of blue water alone did not reflect all types of human interference with the water cycle and Earth system.
Gerten later led work that proposed quantifying the boundary by assessing the amount of streamflow needed to maintain environmental flow requirements in all river basins on Earth. This approach had the advantage of recognizing regionally transgressed limits and thereby deduced a global value.
According to this newer calculation, the freshwater use planetary boundary should be set much lower, at about 2,800 km3 (672 mi3), Gerten says, which means humanity is already much closer to the danger zone than previously thought. “Water is more limited on Planet Earth than we think,” Gerten cautions.
The nine planetary boundaries, counterclockwise from top: climate change, biosphere integrity (functional and genetic), land-system change, freshwater change, biogeochemical flows (nitrogen and phosphorus), ocean acidification, atmospheric aerosol pollution, stratospheric ozone depletion, and release of novel chemicals. In 2022, scientists announced the transgression of both the freshwater and novel entities boundaries. Image courtesy of J. Lokrantz/Azote based on Steffen et al. (2015) via Stockholm Resilience Centre.
Redefining the freshwater boundary: Green water
Over time, a consortium of researchers was formed to deeply scrutinize the freshwater boundary. This resulted in follow-up work in 2019 and 2020 proposing that the freshwater boundary be divided into sub-boundaries related to major stores of freshwater: namely atmospheric water, frozen water, groundwater, soil moisture, and surface water.
Since then, scientists simplified their approach further. “Even though we are talking about very complex matters,” Porkka says, the boundary definition, to be useful as a metric, needed to stay “relatively simple.”
The most recent and sweeping reassessment of the freshwater planetary boundary was published in 2022. “Our suggestion is to … change the name from ‘freshwater use planetary boundary’ to ‘freshwater change planetary boundary,’” says study lead author Lan Wang-Erlandsson from the Stockholm Resilience Centre. “Then, to have two components,” she adds, “One for green water, and one for blue water.”
“Water has so many functions in the Earth system, and many of them happen invisibly via green water,” Gerten explains. “We don’t see it and we don’t feel it. That’s why [green water] has been neglected over decades. The focus has been on river flows and groundwater because we can see it, feel it, use it, and touch it. But [as a result] a big share of the water cycle has been overlooked.”
The Tsitsikamma forests in South Africa’s Garden Route region. The water taken up by plants and released via transpiration as vapor skyward is an integral part of the water cycle. Image by Petro Kotzé.
The newly accepted metric for tracking green water: The soil moisture in the root zone of plants, or more technically: “the percentage of ice-free land area on which root-zone soil moisture anomalies exit the local bounds of baseline variability in any month of the year.”
This new proxy is appealing because it is directly influenced by human pressures with change over time measurable. In turn, soil moisture directly impacts a range of large-scale ecological, climatic, biogeochemical and hydrological dynamics.
Using this novel green water boundary transgression criteria, scientists detected a major hydrological departure from the baseline set during the Holocene. And the evidence for such a departure is overwhelming: Researchers found “unprecedented areas [of Earth] with root-zone soil moisture anomalies,” indicating an exit from the so-called “safe zone.”
A second criteria, Earth Systems Resilience, was also instituted. Researchers evaluated the state of regional climate systems (ranging from monsoons to land carbon sinks and large biomes) to see which have seen enhanced changes in their process rates, resulting in ripple effects that could destabilize the Earth system, Wang-Erlandsson explains.
Lake Sary-Chelek, part of a UNESCO Biosphere Reserve, in Kyrgyzstan. The hydrological cycle represents an eternal exchange of water in different states between the atmosphere and the planet’s surface, and it maintains the biosphere as we know it. Within this cycle, there is constant interaction between blue and green water. Image by Petro Kotzé.
A transgressed freshwater change boundary
Unfortunately, examples of compromised Earth System Resilience transgressions are rife across the planet.
Take the Amazon Rainforest, for instance. It is now understood that carbon uptake likely peaked there in the 1990s, with a sequestration decline since then driven by escalating climate change and fires, along with global demand for agricultural commodities, which spurred extensive Amazon forest clearing, bringing major land-use change. More recently, African tropical forests have passed their carbon uptake peak.
When these vast biomes and natural systems are put under extreme multiple stressors, the effects can self-amplify and lead to greater, more rapid, rates of change, Wang-Erlandsson says: In South America, this combination of stressors, particularly deforestation and climate change, is inducing intensifying drought, which is now leading to cascading perturbations in living systems. Scientists now think the rainforest biome, stable for thousands of years, is reaching a tipping point, and could quickly transition to seasonal forest, or even a degraded savanna. This shift could lead to the transformation of the South American monsoon system, and a permanent state of reduced rainfall and impoverished biodiversity.
But what starts in the Amazon won’t likely stay there: The rainforest’s destruction will release massive amounts of carbon, intensifying climate change, potentially leading to climate and ecological tipping points in other biomes.
Agricultural development in Uzbekistan. Global land-use change, including large-scale deforestation and irrigation, is contributing to major alterations in the water cycle, leading to a destabilized climate and major global environmental and sociopolitical disruptions. Image by Petro Kotzé.
Another concerning example (although debated) of an Earth system shift is the suggestion of a weakening carbon fertilization process, in which higher atmospheric carbon concentrations result in speeded-up photosynthesis as plants try to improve water efficiency in the face of drought. It is thought that this effect is happening already, brought on by limitations in nutrient and soil moisture availability.
In drylands, climate change and ecosystem degradation are triggering vicious cycles of infiltration capacity loss — a decrease in soil moisture and moisture recycling, resulting in increasing desertification and biodiversity loss. In polar permafrost regions, soil moisture saturation could accelerate thawing, generating dangerous methane emissions. Methane is a greenhouse gas far more powerful than carbon dioxide.
Alarmed by the water cycle’s departure from the Holocene baseline, and noting “worrying” signs of low Earth System Resilience, researchers early in 2022 declared the green water boundary to be “considerably transgressed.” The situation, they said, will likely worsen before any reversals in the trend will be observed. “Green water modifications are now causing rising Earth system risks at a scale that modern civilizations might not have ever faced,” the study states.
We don’t yet know what the planetary-scale impacts will ultimately be, but, Porkka says, we have an idea of how impacts could be felt in different parts of the world.
An irrigation canal runs past apricot orchards in the Batken region of Kyrgyzstan. We have vastly manipulated Earth’s water cycle to suit humanity’s needs. Image by Petro Kotzé.
Disastrous extreme weather events
Regional extreme events, including floods and mega droughts, are already occurring, Porkka notes. Examples are to be found on every continent.
On Africa’s southeast coast, as just one example: the World Weather Attribution (WWA) network of scientists has found that human-induced climate change has increased the likelihood and intensity of heavy rainfall associated with tropical cyclones. The group based their findings on an analysis of tropical storms Ana and Batisrai, which battered parts of Madagascar, Mozambique, Malawi and Zimbabwe in early 2022. Both cyclonic systems brought devastating floods that caused severe humanitarian impacts, including many deaths and injuries and large-scale damage to infrastructure. These sorts of extreme weather events put great pressure on socioeconomic and political institutions, and could easily destabilize struggling developing nations.
Of the top 10 climate disasters, those causing the largest human losses during that period were droughts (650,000 deaths), storms (577,232), floods (58,700), and extreme temperature (55,736 deaths). In economic terms, the top 10 events included storms (costing $521 billion) and floods ($115 billion).
Clouds above a dusty road in the Northern Cape of South Africa. The hydrological cycle is powered by the sun and is an eternal exchange of water between the atmosphere and the planet. As climate change escalates, so do extreme weather events such as droughts and intense storms. Image by Petro Kotzé.
Porkka points out, however, that freshwater system destabilization impacts can be more subtle than extreme events. Widespread irrigation of croplands, for example, can increase evaporation to such a high degree that even distant precipitation patterns are altered. Part of the problem is that we do not know if consequences like these are negative or positive.
“[W]e know that we’re changing the [hydrological] system in fundamental ways and, once we do, we don’t really know how the impacts accumulate,” says Porkka.
While many riddles remain, scientists now feel they have a reliable metric for accurately tracking transgressions of the freshwater change boundary. “The prime question was what the key variables are, and I think that is relatively solid now with soil moisture [green water] and river flows [blue water],” Gerten says. “The next questions are, where exactly to put the boundaries, and what happens if they are transgressed?”
Based on these findings, researchers are calling for urgent action: “The current global trends and trajectories of increasing water use, deforestation, land degradation, soil erosion, atmospheric pollution, and climate change need to be promptly halted and reversed to increase the chances of remaining in [Earth’s] safe operating space.”
That’s a tall order, and no matter humanity’s actions, we don’t know how things will play out. “Water is so fundamental and elemental, and at the same time, so varied,” Gerten says, and there is no silver bullet for solving our hydrological problems.
South Africa’s Orange River tumbles over Augrabies Falls. Water is one of the most plentiful chemical compounds on Earth and is recycled endlessly through the biosphere in different forms. Image by Petro Kotzé.
Banner image: Farmers tending to their agricultural land in Uzbekistan. Image by Petro Kotzé.
Citations:
Scanlon, B. R., Jolly, I., Sophocleous, M., & Zhang, L. (2007). Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality. Water Resources Research, 43(3). doi:10.1029/2006wr005486
Gleeson, T., Wang‐Erlandsson, L., Porkka, M., Zipper, S. C., Jaramillo, F., Gerten, D., … Famiglietti, J. S. (2020). Illuminating water cycle modifications and earth system resilience in the Anthropocene. Water Resources Research, 56(4). doi:10.1029/2019wr024957
Gleeson, T., Wang-Erlandsson, L., Zipper, S. C., Porkka, M., Jaramillo, F., Gerten, D., … Famiglietti, J. S. (2020). The water planetary boundary: Interrogation and revision. One Earth, 2(3), 223-234. doi:10.1016/j.oneear.2020.02.009
Gerten, D., Hoff, H., Rockström, J., Jägermeyr, J., Kummu, M., & Pastor, A. V. (2013). Towards a revised planetary boundary for consumptive freshwater use: Role of environmental flow requirements. Current Opinion in Environmental Sustainability, 5(6), 551-558. doi:10.1016/j.cosust.2013.11.001
Zipper, S. C., Jaramillo, F., Wang‐Erlandsson, L., Cornell, S. E., Gleeson, T., Porkka, M., … Gordon, L. (2020). Integrating the water planetary boundary with water management from local to global scales. Earth’s Future, 8(2). doi:10.1029/2019ef001377
Wang-Erlandsson, L., Tobian, A., van der Ent, R. J., Fetzer, I., te Wierik, S., Porkka, M., … Rockström, J. (2022). A planetary boundary for green water. Nature Reviews Earth & Environment. doi:10.1038/s43017-022-00287-8
Hubau, W., Lewis, S. L., Phillips, O. L., Affum-Baffoe, K., Beeckman, H., Cuní-Sanchez, A., … Zemagho, L. (2020). Asynchronous carbon sink saturation in African and Amazonian tropical forests. Nature, 579(7797), 80-87. doi:10.1038/s41586-020-2035-0
Wang, S., Zhang, Y., Ju, W., Chen, J. M., Ciais, P., Cescatti, A., … Peñuelas, J. (2020). Recent global decline of CO2 fertilization effects on vegetation photosynthesis. Science, 370(6522), 1295-1300. doi:10.1126/science.abb7772
Ravi, S., Breshears, D. D., Huxman, T. E., & D’Odorico, P. (2010). Land degradation in drylands: Interactions among hydrologic-aeolian erosion and vegetation dynamics. Geomorphology, 116(3-4), 236-245. doi:10.1016/j.geomorph.2009.11.023
Van Luijk, G., Cowling, R. M., Riksen, M. J. P. M., & Glenday, J. (2013). Hydrological implications of desertification: Degradation of South African semi-arid subtropical thicket. Journal of Arid Environments, 91, 14-21. doi:10.1016/j.jaridenv.2012.10.022
Knoblauch, C., Beer, C., Liebner, S., Grigoriev, M. N., & Pfeiffer, E. (2018). Methane production as key to the greenhouse gas budget of thawing permafrost. Nature Climate Change, 8(4), 309-312. doi:10.1038/s41558-018-0095-z
Editor’s note: “75 of the world’s largest 114 fossil fuel companies have now made net zero by 2050 commitments, yet not a single fossil fuel company has committed to phasing out oil and gas production by 2050 nor have any committed to ending exploration for new oil and gas fields or halting the extraction of existing reserves.”
“Real Zero, not greenwashed ‘net zero,’ is essential. As the Corporate Accountability report concludes, it’s time to reject the big polluters’ agenda and implement programs that rapidly phase out fossil fuels and truly eliminate greenhouse gas emissions.”
We “obsess” over getting to “Net Zero” yearly CO2 increases in the atmosphere. The Moderates in Climate Science THEORIZE that when this happens, the GMST will IMMEDIATELY stop going up and will level off.
DOES IT LOOK LIKE “NET ZERO” is going to happen?
If your child is born this year, they are likely going to live through +1.5°C of warming by the time they are 25. A fact that is likely going to cause a 40% to 50% drop in the global food supply and a reduction of 2.5 billion — 4 billion in the global population by 2050, at a minimum.
The overshoot myth of bargaining: you can’t keep burning fossil fuels and expect scientists of the future to get us back to 1.5°C
Record breaking fossil fuel production, all time high greenhouse gas emissions and extreme temperatures. Like the proverbial frog in the heating pan of water, we refuse to respond to the climate and ecological crisis with any sense of urgency. Under such circumstances, claims from some that global warming can still be limited to no more than 1.5°C take on a surreal quality.
For example, at the start of 2023’s international climate negotiations in Dubai, conference president, Sultan Al Jaber, boldly stated that 1.5°C was his goal and that his presidency would be guided by a “deep sense of urgency” to limit global temperatures to 1.5°C. He made such lofty promises while planning a massive increase in oil and gas production as CEO of the Abu Dhabi National Oil Company.
We should not be surprised to see such behaviour from the head of a fossil fuel company. But Al Jaber is not an outlier. Scratch at the surface of almost any net zero pledge or policy that claims to be aligned with the 1.5°C goal of the landmark 2015 Paris agreement and you will reveal the same sort of reasoning: we can avoid dangerous climate change without actually doing what this demands – which is to rapidly reduce greenhouse gas emissions from industry, transport, energy (70% of total) and food systems (30% of total), while ramping up energy efficiency.
This is also not surprising given that net zero and even the Paris agreement have been built around the perceived need to keep burning fossil fuels, at least in the short term. Not do so would threaten economic growth, given that fossil fuels still supply over 80% of total global energy. The trillions of dollars of fossil fuel assets at risk with rapid decarbonisation have also served as powerful brakes on climate action.
Overshoot
The way to understand this doublethink: that we can avoid dangerous climate change while continuing to burn fossil fuels – is that it relies on the concept of overshoot. The promise is that we can overshoot past any amount of warming, with the deployment of planetary-scale carbon dioxide removal dragging temperatures back down by the end of the century.
This not only cripples any attempt to limit warming to 1.5°C, but risks catastrophic levels of climate change as it locks us in to energy and material-intensive solutions which for the most part exist only on paper.
To argue that we can safely overshoot 1.5°C, or any amount of warming, is saying the quiet bit out loud: we simply don’t care about the increasing amount of suffering and deaths that will be caused while the recovery is worked on.
Our co-editors commission long-form journalism, working with academics from many different backgrounds who are engaged in projects aimed at tackling societal and scientific challenges.
A key element of overshoot is carbon dioxide removal. This is essentially a time machine – we are told we can turn back the clock of decades of delay by sucking carbon dioxide directly out of the atmosphere. We don’t need rapid decarbonisation now, because in the future we will be able to take back those carbon emissions. If or when that doesn’t work, we are led to believe that even more outlandish geoengineering approaches such as spraying sulphurous compounds into the high atmosphere in an attempt to block out sunlight – which amounts to planetary refrigeration – will save us.
The 2015 Paris agreement was an astonishing accomplishment. The establishment of 1.5°C as being the internationally agreed ceiling for warming was a success for those people and nations most exposed to climate change hazards. We know that every fraction of a degree matters. But at the time, believing warming could really be limited to well below 2°C required a leap of faith when it came to nations and companies putting their shoulder to the wheel of decarbonisation. What has happened instead is that the net zero approach of Paris is becoming detached from reality as it is increasingly relying on science fiction levels of speculative technology.
There is arguably an even bigger problem with the Paris agreement. By framing climate change in terms of temperature, it focuses on the symptoms, not the cause. 1.5°C or any amount of warming is the result of humans changing the energy balance of the climate by increasing the amount of carbon dioxide in the atmosphere. This traps more heat. Changes in the global average temperature is the established way of measuring this increase in heat, but no one experiences this average.
Climate change is dangerous because of weather that affects particular places at particular times. Simply put, this extra heat is making weather more unstable. Unfortunately, having temperature targets makes solar geoengineering seem like a sensible approach because it may lower temperatures. But it does this by not reducing, but increasing our interference in the climate system. Trying to block out the sun in response to increasing carbon emissions is like turning on the air conditioning in response to a house fire.
In 2021 we argued that net zero was a dangerous trap. Three years on and we can see the jaws of this trap beginning to close, with climate policy being increasingly framed in terms of overshoot. The resulting impacts on food and water security, poverty, human health, the destruction of biodiversity and ecosystems will produce intolerable suffering.
The situation demands honesty, and a change of course. If this does not materialise then things are likely to deteriorate, potentially rapidly and in ways that may be impossible to control.
Au revoir Paris
The time has come to accept that climate policy has failed, and that the 2015 landmark Paris agreement is dead. We let it die by pretending that we could both continue to burn fossil fuels and avoid dangerous climate change at the same time. Rather than demand the immediate phase out of fossil fuels, the Paris agreement proposed 22nd-century temperature targets which could be met by balancing the sources and sinks of carbon. Within that ambiguity net zero flourished. And yet apart from the COVID economic shock in 2020, emissions have increased every year since 2015, reaching an all time high in 2023.
Despite there being abundant evidence that climate action makes good economic sense (the cost of inaction vastly exceeds the cost of action), no country strengthened their pledges at the last three COPs (the annual UN international meetings) even though it was clear that the world was on course to sail past 2°C, let alone 1.5°C. The Paris agreement should be producing a 50% reduction in greenhouse gas emissions by 2030, but current policies mean that they are on track to be higher than they are today.
Editor’s note: DGR knows that “renewable” technologies are not sustainable and that the only transition will be to a future that does not include civilization.
We do not deny that significant progress has been made with renewable technologies. Rates of deployment of wind and solar have increased each year for the past 22 years and carbon emissions are going down in some of the richest nations, including the UK and the US. But this is not happening fast enough. A central element of the Paris agreement is that richer nations need to lead decarbonisation efforts to give lower income nations more time to transition away from fossil fuels. Despite some claims to the contrary, the global energy transition is not in full swing. In fact, it hasn’t actually begun because the transition demands a reduction in fossil fuel use. Instead it continues to increase year-on-year.
And so policymakers are turning to overshoot in an attempt to claim that they have a plan to avoid dangerous climate change. A central plank of this approach is that the climate system in the future will continue to function as it does today. This is a reckless assumption.
2023’s warning signs
At the start of 2023, Berkeley Earth, NASA, the UK Met Office, and Carbon Briefpredicted that 2023 would be slightly warmer than the previous year but unlikely to set any records. Twelve months later and all four organisations concluded that 2023 was by some distance the warmest year ever recorded. In fact, between February 2023 and February 2024 the global average temperature warming exceeded the Paris target of 1.5°C.
Currently we cannot fully explain why global temperatures have been so high for the past 18 months. Changes in dust, soot and other aerosols are important, and there are natural processes such as El Niño that will be having an effect.
But it appears that there is still something missing in our current understanding of how the climate is responding to human impacts. This includes changes in the Earth’s vital natural carbon cycle.
Around half of all the carbon dioxide humans have put into the atmosphere over the whole of human history has gone into “carbon sinks” on land and the oceans. We get this carbon removal “for free”, and without it, warming would be much higher. Carbon dioxide from the air dissolves in the oceans (making them more acidic which threatens marine ecosystems). At the same time, increasing carbon dioxide promotes the growth of plants and trees which locks up carbon in their leaves, roots, trunks.
All climate policies and scenarios assume that these natural carbon sinks will continue to remove tens of billions of tons of carbon from the atmosphere each year. There is evidence that land-based carbon sinks, such as forests, removed significantly less carbon in 2023. If natural sinks begin to fail – something they may well do in a warmer world – then the task of lowering global temperatures becomes even harder. The only credible way of limiting warming to any amount, is to stop putting greenhouse gasses into the atmosphere in the first place.
Science fiction solutions
It’s clear that the commitments countries have made to date as part of the Paris agreement will not keep humanity safe while carbon emissions and temperatures continue to break records. Indeed, proposing to spend trillions of dollars over this century to suck carbon dioxide out of the air, or the myriad other ways to hack the climate is an acknowledgement that the world’s largest polluters are not going to curb the burning of fossil fuels.
Over the following years we are going to see climate impacts increase. Lethal heatwaves are going to become more common. Storms and floods are going to become increasingly destructive. More people are going to be displaced from their homes. National and regional harvests will fail. Vast sums of money will need to be spent on efforts to adapt to climate change, and perhaps even more compensating those who are most affected. We are expected to believe that while all this and more unfolds, new technologies that will directly modify the Earth’s atmosphere and energy balance will be successfully deployed.
What’s more, some of these technologies may need to operate for three hundred years in order for the consequences of overshoot to be avoided. Rather than quickly slow down carbon polluting activities and increasing the chances that the Earth system will recover, we are instead going all in on net zero and overshoot in an increasingly desperate hope that untested science fiction solutions will save us from climate breakdown.
We can see the cliff edge rapidly approaching. Rather than slam on the brakes, some people are instead pushing their foot down harder on the accelerator. Their justification for this insanity is that we need to go faster in order to be able to make the jump and land safely on the other side.
We believe that many who advocate for carbon dioxide removal and geoengineering do so in good faith. But they include proposals to refreeze the Arctic by pumping up sea water onto ice sheets to form new layers of ice and snow. These are interesting ideas to research, but there is very little evidence this will have any effect on the Arctic let alone global climate. These are the sorts of knots that people tie themselves up in when they acknowledge the failure of climate policy, but refuse to challenge the fundamental forces behind such failure. They are unwittingly slowing down the only effective action of rapidly phasing out fossil fuels.
That’s because proposals to remove carbon dioxide from the air or geoengineer the climate promise a recovery from overshoot, a recovery that will be delivered by innovation, driven by growth. That this growth is powered by the same fossil fuels that are causing the problem in the first place doesn’t feature in their analysis.
The bottom line here is that the climate system is utterly indifferent to our pledges and promises. It doesn’t care about economic growth. And if we carry on burning fossil fuels then it will not stop changing until the energy balance is restored. By which time millions of people could be dead, with many more facing intolerable suffering.
Major climate tipping points
Even if we assume that carbon removal and even geoengineering technologies can be deployed in time, there is a very large problem with the plan to overshoot 1.5°C and then lower temperatures later: tipping points.
The science of tipping points is rapidly advancing. Late last year one of us (James Dyke) along with over 200 academics from around the world was involved in the production of the Global Tipping Points Report. This was a review of the latest science about where tipping points in the climate system may be, as well as exploring how social systems can undertake rapid change (in the direction that we want) thereby producing positive tipping points. Within the report’s 350 pages is abundant evidence that the overshoot approach is an extraordinarily dangerous gamble with the future of humanity. Some tipping points have the potential to cause global havoc.
The melt of permafrost could release billions of tons of greenhouse gasses into the atmosphere and supercharge human-caused climate change. Fortunately, this seems unlikely under the current warming. Unfortunately, the chance that ocean currents in the North Atlantic could collapse may be much higher than previously thought. If that were to materialise, weather systems across the world, but in particular in Europe and North America, would be thrown into chaos. Beyond 1.5°C, warm water coral reefs are heading towards annihilation. The latest science concludes that by 2°C global reefs would be reduced by 99%. The devastating bleaching event unfolding across the Great Barrier Reef follows multiple mass mortality events. To say we are witnessing one of the world’s greatest biological wonders die is insufficient. We are knowingly killing it.
We may have even already passed some major climate tipping points. The Earth has two great ice sheets, Antarctica, and Greenland. Both are disappearing as a consequence of climate change. Between 2016 and 2020, the Greenland ice sheet lost on average 372 billion tons of ice a year. The current best assessment of when a tipping point could be reached for the Greenland ice sheet is around 1.5°C.
This does not mean that the Greenland ice sheet will suddenly collapse if warming exceeds that level. There is so much ice (some 2,800 trillion tons) that it would take centuries for all of it to melt over which time sea levels would rise seven metres. If global temperatures could be brought back down after a tipping point, then maybe the ice sheet could be stabilised. We just cannot say with any certainty that such a recovery would be possible. While we struggle with the science, 30 million tons of ice is melting across Greenland every hour on average.
Ice sheets in Greenland and Antarctica are being affected by global warming. Pexels from Pixabay, CC BY
The take home message from research on these and other tipping points is that further warming accelerates us towards catastrophe. Important science, but is anyone listening?
It’s five minutes to midnight…again
We know we must urgently act on climate change because we are repeatedly told that time is running out. In 2015, Professor Jeffrey Sachs, the UN special adviser and director of The Earth Institute, declared:
The time has finally arrived – we’ve been talking about these six months for many years but we’re now here. This is certainly our generation’s best chance to get on track.
In 2019 (then) Prince Charles gave a speech in which he said: “I am firmly of the view that the next 18 months will decide our ability to keep climate change to survivable levels and to restore nature to the equilibrium we need for our survival.”
“We have six months to save the planet,” exhorted International Energy Agency head Fatih Birol – one year later in 2020. In April 2024, Simon Stiell, executive secretary of the United Nations Framework Convention on Climate Change said the next two years are “essential in saving our planet”.
Either the climate crisis has a very fortunate feature that allows the countdown to catastrophe to be continually reset, or we are deluding ourselves with endless declarations that time has not quite run out. If you can repeatedly hit snooze on your alarm clock and roll over back to sleep, then your alarm clock is not working.
Or there is another possibility. Stressing that we have very little time to act is intended to focus attention on climate negotiations. It’s part of a wider attempt to not just wake people up to the impending crisis, but generate effective action. This is sometimes used to explain how the 1.5°C threshold of warming came to be agreed. Rather than a specific target, it should be understood as a stretch goal. We may very well fail, but in reaching for it we move much faster than we would have done with a higher target, such as 2°C. For example, consider this statement made in 2018:
Stretching the goal to 1.5 degrees celsius isn’t simply about speeding up. Rather, something else must happen and society needs to find another lever to pull on a global scale.
What could this lever be? New thinking about economics that goes beyond GDP? Serious consideration of how rich industrialised nations could financially and materially help poorer nations to leapfrog fossil fuel infrastructure? Participatory democracy approaches that could help birth the radical new politics needed for the restructuring of our fossil fuel powered societies? None of these.
The lever in question is Carbon Capture and Storage (CCS) because the above quote comes from an article written by Shell in 2018. In this advertorial Shell argues that we will need fossil fuels for many decades to come. CCS allows the promise that we can continue to burn fossil fuels and avoid carbon dioxide pollution by trapping the gas before it leaves the chimney. Back in 2018, Shell was promoting its carbon removal and offsets heavy Sky Scenario, an approach described as “a dangerous fantasy” by leading climate change academics as it assumed massive carbon emissions could be offset by tree planting.
Shell is far from alone in waving carbon capture magic wands. Exxon is making great claims for CCS as a way to produce net zero hydrogen from fossil gas – claims that have been subject to pointed criticism from academics with recent reporting exposing industry wide greenwashing around CCS.
But the rot goes much deeper. All climate policy scenarios that propose to limit warming to near 1.5°C rely on the largely unproven technologies of CCS and BECCS. BECCS sounds like a good idea in theory. Rather than burn coal in a power station, burn biomass such as wood chips. This would initially be a carbon neutral way of generating electricity if you grew as many trees as you cut down and burnt. If you then add scrubbers to the power station chimneys to capture the carbon dioxide, and then bury that carbon deep underground, then you would be able to generate power at the same time as reducing concentrations of carbon dioxide in the atmosphere.
Unfortunately, there is now clear evidence that in practice, large-scale BECCS would have very adverse effects on biodiversity, and food and water security given the large amounts of land that would be given over to fast growing monoculture tree plantations. The burning of biomass may even be increasing carbon dioxide emissions. Drax, the UK’s largest biomass power station now produces four times as much carbon dioxide as the UK’s largest coal-fired power station.
Five minutes to midnight messages may be motivated to try to galvanise action, to stress the urgency of the situation and that we still (just) have time. But time for what? Climate policy only ever offers gradual change, certainly nothing that would threaten economic growth, or the redistribution of wealth and resources.
Despite the mounting evidence that globalised, industrialised capitalism is propelling humanity towards disaster, five minutes to midnight does not allow time and space to seriously consider alternatives. Instead, the solutions on offer are techno fixes that prop up the status quo and insists that fossil fuel companies such as Shell must be part of the solution.
That is not to say there are no good faith arguments for 1.5°C. But being well motivated does not alter reality. And the reality is that warming will soon pass 1.5°C, and that the Paris agreement has failed. In the light of that, repeatedly asking people to not give up hope, that we can avoid a now unavoidable outcome risks becoming counterproductive. Because if you insist on the impossible (burning fossil fuels and avoiding dangerous climate change), then you must invoke miracles. And there is an entire fossil fuel industry quite desperate to sell such miracles in the form of CCS.
Four suggestions
Humanity has enough problems right now, what we need are solutions. This is the response we sometimes get when we argue that there are fundamental problems with the net zero concept and the Paris agreement. It can be summed up with the simple question: so what’s your suggestion? Below we offer four.
1. Leave fossil fuels in the ground
The unavoidable reality is that we need to rapidly stop burning fossil fuels. The only way we can be sure of that is by leaving them in the ground. We have to stop exploring for new fossil fuel reserves and the exploitation of existing ones. That could be done by stopping fossil fuel financing.
At the same time we must transform the food system, especially the livestock sector, given that it is responsible for nearly two thirds of agricultural emissions. Start there and then work out how best the goods and services of economies can be distributed. Let’s have arguments about that based on reality not wishful thinking.
2. Ditch net zero crystal ball gazing targets
The entire framing of mid and end-century net zero targets should be binned. We are already in the danger zone. The situation demands immediate action, not promises of balancing carbon budgets decades into the future. The SBTi should focus on near-term emissions reductions. By 2030, global emissions need to be half of what they are today for any chance of limiting warming to no more than 2°C.
It is the responsibility of those who hold most power – politicians and business leaders – to act now. To that end we must demand twin targets – all net zero plans should include a separate target for actual reductions in greenhouse gas emissions. We must stop hiding inaction behind promises of future removals. It’s our children and future generations that will need to pay back the overshoot debt.
3. Base policy on credible science and engineering
All climate policies must be based on what can be done in the real world now, or in the very near future. If it is established that a credible amount of carbon can be removed by a proposed approach – which includes capture and its safe permanent storage – then and only then can this be included in net zero plans. The same applies to solar geoengineering.
Speculative technologies must be removed from all policies, pledges and scenarios until we are sure of how they will work, how they will be monitored, reported and validated, and what they will do to not just the climate but the Earth system as a whole. This would probably require a very large increase in research. As academics we like doing research. But academics need to be wary that concluding “needs more research” is not interpreted as “with a bit more funding this could work”.
4. Get real
Finally, around the world there are thousands of groups, projects, initiatives, and collectives that are working towards climate justice. But while there is a Climate Majority Project, and a Climate Reality Project, there is no Climate Honesty Project (although People Get Real does come close). In 2018 Extinction Rebellion was formed and demanded that governments tell the truth about the climate crisis and act accordingly. We can now see that when politicians were making their net zero promises they were also crossing their fingers behind their backs.
We need to acknowledge that net zero and now overshoot are becoming used to argue that nothing fundamental needs to change in our energy intensive societies. We must be honest about our current situation, and where we are heading. Difficult truths need to be told. This includes highlighting the vast inequalities of wealth, carbon emissions, and vulnerability to climate change.
The time for action is now
We rightly blame politicians for failing to act. But in some respects we get the politicians we deserve. Most people, even those that care about climate change, continue to demand cheap energy and food, and a constant supply of consumer products. Reducing demand by just making things more expensive risks plunging people into food and energy poverty and so policies to reduce emissions from consumption need to go beyond market-based approaches. The cost of living crisis is not separate from the climate and ecological crisis. They demand that we radically rethink how our economies and societies function, and whose interests they serve.
To return to the boiling frog predicament at the start, it’s high time for us to jump out of the pot. You have to wonder why we did not start decades ago. It’s here that the analogy offers valuable insights into net zero and the Paris agreement. Because the boiling frog story as typically told misses out a crucial fact. Regular frogs are not stupid. While they will happily sit in slowly warming water, they will attempt to escape once it becomes uncomfortable. The parable as told today is based on experiments at the end of the 19th century that involved frogs that had been “pithed” – a metal rod had been inserted into their skulls that destroyed their higher brain functioning. These radically lobotomised frogs would indeed float inert in water that was cooking them alive.
Promises of net zero and recovery from overshoot are keeping us from struggling to safety. They assure us nothing too drastic needs to happen just yet. Be patient, relax. Meanwhile the planet burns and we see any sort of sustainable future go up in smoke.
Owning up to the failures of climate change policy doesn’t mean giving up. It means accepting the consequences of getting things wrong, and not making the same mistakes. We must plan routes to safe and just futures from where we are, rather where we would wish to be. The time has come to leap.
To hear about new Insights articles, join the hundreds of thousands of people who value The Conversation’s evidence-based news. Subscribe to our newsletter.
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.
“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
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.
