Category Archives: Arctic sea ice

Ecological realism in climate change investment

Awareness by podcast

My 7 December 2023 interview on The Why? Curve podcast aimed to raise awareness of the need for smarter investment in climate change mitigation to prevent major Earth systems breaking down in the 2050s or 2060s. Worse, there are reasons to think that the loss of Arctic summer sea ice from around 2030 could accelerate this process dramatically. These risks are so obvious and dire that they call for urgent precautionary action.

Cascades of chaos

Major Earth systems are becoming unstable under stress from global heating and other more direct pressures. These systems include the Arctic Ocean and its surrounding coasts and permafrosts, the Amazon and other rainforests, and major ocean currents and monsoons. They have been absorbing stresses for decades but are now approaching the limits of their tolerance. That limit is each system’s tipping point, when it becomes committed to chaotic transformation. Because Earth systems are connected they can pull each other over, so multiple systems could become committed to breaking down at about the same time. This would be a ‘biosphere-wide tipping point‘ (BTP), which is a key moment because we can influence outcomes until it is reached, but we will be powerless to do so afterwards.

Deadline awareness

Time for a re-think

The idea of a BTP challenges all our assumptions about the future. These were shaped during centuries of economic expansion into what was seen as an infinite global frontier. But our predicament now, at the end of that phase, leads us towards the idea of deadline-aware mitigation investment (DAMI) with a new purpose and a new approach.

  • The new purpose would be to postpone the BTP, thus buying ourselves time to strengthen our societies against climate chaos, decarbonise our economies, recapture GHGs from the air, and restore peace with nature.
  • The new approach would be to refocus investments on those that are proven to reduce net GHG emissions soonest and most cost-effectively, while remaining true to our other values.

Postponing the BTP

I have proposed and demonstrated a transparent and consistent way to calculate the cost-effectiveness of different mitigation investments in postponing the BTP. This relies on:

  • assuming a realistic date for the BTP;
  • calculating the amount and timing of net GHG emission savings from each mitigation investment up to that date (in tCO2e);
  • valuing those savings exponentially more highly the sooner they are delivered relative to that date, to give us the ‘dated mitigation value’ of each investment (in tCO2edmv); and
  • estimating true mitigation cost-effectiveness from the cost of the project over the same period (in tCO2edmv/£).

DAMI useful

Armed with data on true mitigation cost-effectiveness, public servants can reliably choose the best public investments. This would improve governments’ ability to deliver on their ‘net zero’ or Paris Agreement goals. Taxes and other regulatory signals can also be adjusted to ensure that the most cost-effective mitigation projects attract the highest rates of financial return for private investors, while also valuing healthy ecosystems, biodiversity, human rights and other important co-benefits.

The Arctic threat

Summer sea ice decline

The progressive thinning and shrinking of Arctic Ocean sea ice since 1979 was first flagged by Peter Wadhams, former Director of the Scott Polar Research Institute, in his 2016 book A Farewell to Ice. The volume of Arctic summer sea ice continued to decline and is now expected to approach zero at its September minimum by around 2030.

Heating oceans

The context for the Arctic issue is the rising heat of the oceans. This has increased by hundreds of zettajoules (ZJ) since the mid-1980s (one ZJ ≈ double humanity’s current energy use). This is where most greenhouse heat has been going, with much of the rest going into melting ice.

Step-change in Arctic heating

Without summer sea ice to absorb excess heat, at least two mechanisms mean that the temperature of the Arctic Ocean and its seabed and coastal zone will begin to rise much faster than before. These are:

  • that it takes 80 times less heat to warm water than to melt ice (4 J/g/C for water [due to its ‘heat capacity’] vs 334 J/g/C for ice [due to its ‘latent heat of fusion’]); and
  • that without white and reflective ice, more solar heat enters the ocean.

Potential methane consequences

The likely rate at which Arctic Ocean temperature will rise under ice-free summer conditions is unknown, but could be high. Until we know what will actually happen, a precautionary attitude is called for since sudden Arctic heating could have the following consequences:

  • a potentially large share of many hundreds of billions of tonnes (Gt) of peat contained within permafrosts throughout the Arctic will decay and release methane (CH4); and
  • a potentially large share of the hundreds of Gt of CH4 contained within frozen clathrates (or hydrates) in the Arctic seabed will be released.

Potential climate consequences

Every tonne of methane is about 86 times more potent as a GHG over 20 years (the most relevant timescale) than a tonne of carbon dioxide (CO2), so 1 Gt CH4 ≈ 86 GtCO2e, equivalent to about twice current global emissions of all GHGs put together. If there’s the slightest chance of this happening, urgent precautionary investment to mitigate harm would be justified. Since we cannot now prevent the loss of Arctic summer sea ice, this may have to involve open-air methane recapture. If we need to do this in the 2030s, we should start thinking about it now.

What is to be done?

As a contribution to safeguarding the process of urgent, fair and effective decarbonisation, my podcast aimed to raise awareness and encourage urgent, practical thought:

  • about the BTP deadline, to encourage greater cost-effectiveness in mitigation investment, so that everything we do contributes to postponing the BTP;
  • about the Arctic methane threat, to alert people to the need for precautionary action to make sure that we don’t sleep-walk into an early BTP; and
  • about both, to encourage anyone who can to spread the word, the sense of urgency, and the need for a new spirit of ecological realism in all our actions.

Julian Caldecott 2023

Fossil Fools Day, 2023

On this first day of April we celebrate foolishness. There is none greater than burning your own home because you like the pretty flames. It’s not even as clever as peeing in your pants to keep warm at the start of winter, as they say in the Nordic countries. So we throw more coal, peat, forests, petroleum and natural gas on the fire because it’s convenient right now. But the effects, as Al Gore and Greta Thunberg have pointed out, will be not just inconvenient but deadly.

Too many fires are making too much carbon dioxide too quickly. This traps the sun’s heat on Earth, warming the oceans and melting the ice of the poles. The Arctic is an ocean surrounded by land. In its bed are a trillion tonnes of frozen methane, which is already bubbling to the surface, and methane is much better at trapping heat than carbon dioxide. Moreover, in the frozen lands around about are another trillion tonnes of methane, held in frozen peat and organic soils. This is already leaking out as the ice lands melt and rot.

So what will happen when global heating pushes the Arctic beyond whatever tipping point keeps it in the deep freeze? Of course the answer is an immense pulse of methane. That’s the big show that could finish us off. Carbon dioxide is only the warm-up act. And when might that happen? All the signs suggest around the middle of this century. Are we ready for this, and do we even know what ‘being ready’ means? Are we even trying seriously to cut back on carbon dioxide emissions? We still churn out scores of billions of tonnes of the stuff every year, and save only a thousandth part of that. So the answers are: not yet!.

We seem inclined to keep putting things off. But with a mid-century deadline looming from the Arctic methane if nothing else, putting things off is really daft. Even if the sums are wrong and it’s really the 2080s rather than the 2050s when the Arctic methane hits the fan, that’s still not very long. We need to get a grip. And that means putting away the jester’s bladder and getting serious. So what to do instead of acting the Fossil Fool?

I could rattle off a list, but here are a couple. First, we should vote only for leaders who will tax carbon emissions radically and enable ferocious and fair investment in decarbonising our economies. And second, we should make sure that rewards from investment are highest when emissions are avoided soonest. With special merit points for those that also help protect and restore nature, and that promote human wellbeing and community solidarity. This would make working with local communities to prevent harm to all our remaining high carbon-density natural ecosystems the maximum top priority everywhere on Earth.

The simple fact in this emergency is that a tonne of emissions avoided now has much more survival value than a tonne of emissions avoided years from now. So that should be the starting point of all our policies, and it should shape all our efforts, incentives and disincentives. Any proposal to decarbonise anything should be met by the question: how much carbon saved how quickly? And be closely followed by another: and with what co-benefits?

These questions will lead not only to the best nature-based and community-based solutions, but to the best technological ones as well. The point is that every potential investment should be made to answer the same questions, so we can compare them. Talking up innovative and imaginative solutions is OK, but only if they are supported by evidence-based reasoning that lets us pick the most cost-effective ways to avoid global catastrophe. Survival value, precaution and co-benefits should be the watchwords. The time is over for Fossil Fool governments that fail to protect us, our children and the biosphere. No to more foolishness! Happy All-Fools Day.

© Julian Caldecott

New paper on biosphere tipping points and climate investment

My new paper ‘Implications of Earth system tipping pathways for climate change mitigation investment’ has now been published in the peer-reviewed journal Discover Sustainability. It can be freely downloaded here. In it, I explore some implications of an anticipated biosphere-wide tipping point (BTP) in the year 2050 ± 10, including:

  • that all climate change mitigation investments should be designed, chosen and judged against this hard and dated deadline, thus urgently prioritising early delivery of net GHG savings;
  • that deadline-compliant investments should aim transparently for optimum cost-effectiveness in their biophysical outcomes, especially net GHG emission savings but also biodiversity, ecosystem service and climate change adaptation co-benefits; and
  • that investors and markets should prefer actions that yield highly cost-effective biophysical returns, especially where valuable co-benefits are expected.

I explain how to do the necessary calculations, and I provide examples from recent mitigation aid portfolios to support a change of focus from financial to biophysical returns on investment. From these cases, key ways to prevent the BTP include protecting and restoring high carbon-density natural ecosystems, and improving choice awareness and building capacity to promote decarbonisation in all economic sectors.

Three urgent research priorities remain: (1) on the consequences of an Arctic Ocean imminently free of summer sea ice, and options for remedial action including the recapture of methane at large scale and high speed; (2) on testing a new dated mitigation value metric in justifying precautionary mitigation investments in multiple sectors and contexts; and (3) on integrating diverse co-benefit values (biodiversity, ecosystem services, adaptation, etc.) into mitigation investment decision making.

Buying time to avoid Earth system breakdown

In this talk at the Edinburgh Climate Change Institute, Julian Caldecott warns of tipping points driven by global heating in the Arctic and other complex Earth systems. These systems have been under stress for decades, due to the heat-trapping effects of excess greenhouse gases. Using the case of the Arctic sea ice ‘death spiral’ since 1979, Julian explains how complex systems under this kind of stress tend to resist change before suddenly tipping into new forms. He then uses his knowledge of government climate aid programmes to show how being aware of mid-century deadlines can help us make better choices in mitigating climate change. Having a dated reference point would make it easier to calculate the true mitigation value of investments, thus helping to buy us time to build a safer and fairer world, one with peace with nature at its heart. But peace with nature needs ecosystem thinking, and this must quickly become normal if system change is to occur. Julian asks challenging questions about ‘business as usual’ climate aid, and offers new solutions in this most vital area of public policy.

Watch the video, or read more …

Some of the thinking in the talk is new and unorthodox. It treats Earth systems as complex and assumes that, like other complex systems, they can tip suddenly from one state to another after they have been under stress for a long time. Julian argues that just such a stress is the trapping of heat in the biosphere by greenhouse gases at a concentration in the air above 300 ppm CO2, which has been the case since about 1950. Its direct consequences include rising heat content of the world ocean and increasing global mean surface temperature (GMST). Its indirect consequences include declining polar sea ice volume, melting glaciers, marine and terrestrial heatwaves, weakening ocean currents and changing weather patterns that are often experienced as environmental chaos and usually described as climate change (CC).

The current 1.5 C goal, based on GMST, helps to focus public attention and mobilise action by governments. But it does not reflect the non-linear responses to be expected of a system as complex as the biosphere. The continuity of cause and effect over time, and the prospect of tipping points, challenge the realism of CC mitigation planning and investment assumptions. Improvements can be made by using an estimate of when Earth systems will, with current timing and heating trends, become irreversibly committed to transformational (‘tipping point’) change. This will pre-date the tipping point itself, so estimating when allows us to judge the effectiveness of CC mitigation investments in postponing it. Postponing tipping points is how we can buy ourselves time to make the changes needed for longer-term safety.

But such postponements may well become harder to do over time, as each system becomes steadily more inclined to transform itself. A relevant case is the ice-free Arctic Ocean, anticipated for September 2035 ± 5, which may already be unstoppable and could well drive a dangerous methane surge when it occurs. The mitigation value of delivering avoided net emissions would presumably decline in real terms as the commitment point is approached, either suddenly on its eve or more gradually in the preceding years. Uncertainties abound and call for precautionary thinking about the dates involved and the mitigation value of investments, including the unit value of mitigation returns on those investments. For these purposes, it is more realistic to reduce that value exponentially from now to the commitment point, rather than to assume a change from ‘valuable’ to ‘valueless’ the day before it.

Thus, a dated ‘deadline’ in mid century (2050 ± 10) might be chosen to represent the transformation commitment point of key Earth systems. This is based on the trajectory of change in sea ice minima in the Arctic Ocean, and on the rate and direction of change in other cryosphere (ice-world) and oceanic systems, and in major equatorial forest areas. Whatever the deadline chosen, precautionary investment plans would exponentially reduce the value of each expected mitigation unit as the deadline approaches. Such plans would therefore express all expected emission reductions not in tCO2e but in tCO2edmv, where ‘dmv’ stands for dated mitigation value. This would have the effect of valuing early net emission gains more highly than later ones. This is already in principle a common aim, but a standard metric would allow direct comparison of true cost-effectiveness between alternative investments in practice.

Julian tested the usefulness of this approach with data from projects funded by one EU member state in three developing countries, targeting: avoided deforestation; forest regrowth (also representing tree planting); wind farming (representing renewable energy, RE); and capacity building for economy-wide decarbonisation. Over 21 years with a constant 0.1 exponent used to depreciate mitigation value (such that 1 tCO2edmv in year 1 = 0.41 tCO2edmv in year 10 = 0.14 tCO2edmv in year 21), returns were estimated at 0.90 tCO2edmv/€ for capacity building, with least certainty; at 0.40 tCO2edmv/€ for avoided deforestation, with moderate certainty; at 0.05 tCO2edmv/€ for forest regeneration/planting, with moderate certainty; and at 0.01 tCO2edmv/€ for wind farming, with most certainty.

Among the cases with moderate to most certainty, the much higher mitigation returns from avoided deforestation than from RE and tree planting investments offer a key lesson to mitigation planners. Variation in the certainty of returns is an important factor in choosing the right mix of investments for each location, but so too are the varied co-benefits (biodiversity, adaptation, human rights, sustainable development, etc.) available from different investment strategies. And the biggest risk of all is that transformation commitment points in Earth systems cannot be postponed (or will not, due weak precaution and/or weak leadership).

This all suggests that a key starting point for justifying the expenditure of public mitigation funds lies the calculation of tCO2edmv/€. Once this is done, other factors such as expected co-benefits can be considered in detail. But the initial calculation would require an agreed deadline date (which could be moved by agreement later, if success is achieved), an agreed exponent for converting tCO2e into tCO2edmv, and attention to the comparative valuation of co-benefits for fine-tuning the justification of each investment.

Watch Julian’s talk and the Q&A afterwards here.

Ecological Risk and the Climate Emergency

My talk at ‘The Cooler Earth Sustainability Summit’ in Kuala Lumpur (1st October 2019).

1.          Introduction

Anxiety, frustration and risk are key themes of the climate and ecological emergency. Anxiety because nature is in free fall and signs of universal calamity are multiplying. Frustration because so little has been done to solve problems that have been anticipated for decades. Risk because of severe dangers to the biosphere, to human society and therefore to all businesses. This paper focuses on the Arctic ‘death spiral’ as an ecological risk that also illustrates the idea of tipping points, the Extinction Rebellion (XR) and Greta Thunberg’s Climate Strike as sources of transformative social change, and Malaysian opportunities for strategic leadership.

2.         Ecological emergency

At the global level, human impact are known to have been exceeded safe limits in four areas: biosphere integrity, climate change, land-system change, and biogeochemical flows. These add up to key dimensions of the ‘climate and ecological emergency’: climate chaos, ecological breakdown, mass extinction. All have the potential to induce chaotic environmental change. Since our farms and cities depend on conditions that have been stable for nearly 12,000 years, any such change would be catastrophically damaging and could well prove fatal to humanity.

Since 1992, scientists organised through the Intergovernmental Panel on Climate Change (IPCC), Millennium Ecosystem Assessment (MA), and Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) have shown us to be pushing the boundaries of biosphere integrity. Moreover, based on published evidence from many taxa, the Living Planet Index (LPI) shows a decline of over 60% in wildlife abundance since 1970 (Figure 1). In 2019, IPBES reported that close to a million species are threatened by human actions, while my own analysis implies that up to a million species are now becoming committed to extinction each year due to ‘web of life’ failures such as trophic shifts and the loss of co-evolved species.

Figure 1: The Living Planet Index: the decline of life on Earth since 1970

Natural ecosystems sustain water supplies, environmental security, pollination of crops, fisheries and soil fertility that cannot be replaced by artificial alternatives. Yet it became clear during the 2000s and 2010s that these ecosystems were deteriorating fast, exposing humanity and our farmlands and settlements to severe risks and costs. The overall message is that all the living systems that provide food, water and security for people and businesses are failing, and the failures are starting to join up. Each part of the pattern is a spreading desert, drought, wildfire, flood, storm, mudslide, epidemic, extinction, famine, or political crisis induced by them.

3.         Climate emergency

From the analysis of air bubbles trapped in ice, the carbon dioxide (CO2) concentration of the atmosphere is known to have varied over time but to have remained below 280 parts per million (ppm, or 0.028%) for 800,000 years to 1950 (Figure 2). Our machines burn fossil fuels and produce exhausts mainly in the form of CO2. Land clearances have the same effect, by felling, burning, ploughing and planting natural forest and soil ecosystems. The world’s economy has grown since the Industrial Revolution, and especially since the Second World War, and not all of this carbon could be absorbed by oceans and plants. So around 1950 it began to exceed the Earth’s capacity to absorb it, resulting in raised atmospheric CO2 concentration.

Figure 2: Atmospheric CO2 – 800,000 years to now

This has been monitored on a mountain in Hawaii since 1958, yielding the Keeling Curve (Figure 3). Superimposed on seasonal variation as the biosphere ‘breathes’, this displays an underlying trend of CO2 levels rising through the previous ceiling of 280 ppm to reach the current level of almost 420 ppm, and continuing to increase at about 3 ppm annually. CO2 is transparent to short-wavelength light but is partly opaque to long-wavelength heat, so in the air it allows sunlight to enter the biosphere but inhibits the radiation of heat into space. This mimics the warming affect of glass windows in a greenhouse, so CO2 is called a ‘greenhouse gas’ (GHG).

Figure 3: The Keeling Curve – Atmospheric CO2 since 1958.

There are other GHGs, including several industrial ones (e.g. nitrous oxide, carbon tetrachloride, the chlorofluorocarbons, and sulphur hexachloride), and methane (CH4) from bacterial decay and fermentation of organic material in oil fields, livestock, soils and peat. Most GHGs are carbon-based, so they are often just called ‘carbon emissions’. Their combined effect on global heating (i.e. their collective ‘radiative forcing’ effect) is expressed as tonnes of CO2 equivalent (tCO2e). The tCO2e level was 0.041% in 1998 and is now 0.053%, and rising. Since methane is 20-80 times more potent as a GHG than CO2, total radiative forcing is bound to rise more steeply as methane is added to the mix. The world has so far heated by about one degree in a hundred years, more in the Arctic than elsewhere, and mostly since 1980. This heating has been enough to disturb ocean currents and rainfall patterns, and to melt ice, causing ecological risks.

4.         Ecological risk

Risk judgements combine assessments of danger (what might go wrong), probability (if it’ll go wrong), and timing (when it might go wrong). Assessing risk requires knowledge, and scientists have now developed a clear sense of ecological risk in the present global situation (Tables 1-3).

Table 1: Three things that might go wrong (severe dangers)
Climate chaos: dramatic change to climatic conditions that have prevailed over thousands of years, to which our farms, settlements, businesses, etc., are adapted.
Ecosystem breakdown: the failure of millions of ecosystems, so that they can no longer provide ecosystem services at local, national or continental scale.
Mass extinction: the extinction of millions of wild species, including very ancient lineages and species that pollinate crops or maintain soil fertility.
Table 2: Three reasons why things are likely to go wrong (high probabilities)
Climate systems: assessments using knowledge of system turbulence, past behaviour, greenhouse effect and physical chemistry, observed changes and their human causes.
Ecological systems: assessments using knowledge of evolutionary history, ecological rules, responses of known ecosystems, observed changes and their human causes.
Extinction processes: assessments using knowledge of past mass extinctions, needs of wild species, patchy distribution of wild species, observed changes and their human causes.
Table 3: Three reasons why things may soon go wrong (imminent timings)
Worsening trends, such as polar and glacial ice melt, and drying and burning trends in the Amazon Basin, southern Europe and South-east Asia.
Recent changes, such as deforestation in large parts of the equatorial tropics, desertification, declining wildlife populations, etc.
Approaching ‘tipping points’, in which systems change suddenly from one stable state to another, through a brief (milliseconds to millennia) chaotic transition.

5.         The idea of tipping points

Of the dangers, likelihoods and timings in Tables 1-3, only tipping points are uncertain in the sense of being inferred rather than demonstrable. The idea occurs often in the social sciences, where it is relevant to fashion, marketing, political consensus and Zeitgeist (the ‘spirit of the times’), and in the natural sciences of physical, chemical and biological systems. In the present context it raises doubts over whether we can manage major environmental change at all, other than by using a precautionary approach. The latter means doing only things that have been proved to be harmless, thus avoiding negative but unpredictable consequences, rather than starting with actions that are easy and profitable, and then trying to manage the consequences. Ecologists prefer precautionary approaches, and they do work well for example in fisheries, where the alternative ‘maximum sustainable yield’ approach is ineffective, but they are slow and cautious, the opposite of ‘get-rich-quick’ schemes. In general, they appeal more to pessimists than to optimists who are also inclined to expect technological fixes to solve complex problems.

The other problem with the tipping point idea is that it needs ‘systems thinking’ to understand – an awareness of how complex systems behave. Complexity is familiar in the worlds of finance, business and ecology, but politicians and media people are more used to simplicity. It is hard to reduce complexity to simple political messages, making it hard to explain the need for change. Rejecting the messages of ecology and complexity can also be an excuse to protect ‘business as usual’, which may appeal to those who are doing well out of it. Experience has shown that such people will tend to resist the tipping point idea, even after all the other elements of ecological risk have been accepted. Fear of accepting truth can be so strong that even the smallest limit to scientific certainty may be used to justify denial of the problem.

6.         Ecological tipping points

Several large-scale ecological tipping points are currently at issue. Deforestation in the Amazon basin, for example, which is now at about 20% of land area, is thought to be very close to the point where there will be insufficient rainforest to maintain the region’s moist climate. Sustained and repeated drought would then permit the rapid replacement of all forest by fire-maintained grassland. A similar scenario is in prospect in Borneo and Sumatra. In all three cases, forest and land fires are underway and consistent with the tipping point prediction, with catastrophic implications for tropical biodiversity, environments and livelihoods.

The case of the Arctic further illustrates the tipping point principle, and poses a clear and present danger to all life on Earth. Figure 4 represents the ‘Arctic death spiral’, so called because it displays in spiral form the volume of sea ice in the Arctic ocean declining in the period 1979 to 2019, its depth having been measured by military submarines and its area by satellite imagery. Here it is notable that before 1980 there was little seasonal variation in sea ice volume as so much of it was in the form of deep, multi-year ice. Then, in the 1980s and 1990s multi-year ice declined and seasonal effects became more marked, and after 1997 most of the ice became single-year and began dramatically expanding in the winter and contracting in the summer.

Figure 4: The Arctic ‘death spiral’

The declining minimum ice volume in September each year (the innermost line) is the key, since from the trends visible this seems likely to approach zero in the early 2030s.  To appreciate the significance of this, it is necessary to understand several processes that are at work in the Arctic system: melting sea ice, melting peat, methane release, and fire (Box 1).

Box 1: Processes of ecological risk in the Arctic ‘death spiral’
Melting sea ice.

·       The ‘mass-melting’ effect. It takes 80 times more heat to melt ice than to warm liquid water, because of the difference between the ‘heat capacity’ of water (i.e. it takes one calorie or 4.186 joules to heat one gramme of water by one degree) and its ‘latent heat of fusion’ (i.e. it takes 80 calories or 334 joules to turn one gramme of ice at -1o to liquid water); thus, much of the extra greenhouse heat in the biosphere has so far been melting ice rather than warming sea water.

·       The ‘area-reflectivity’ effect. Ice is white and reflective, so its declining area means that more summer sunlight is absorbed by the relatively dark waters of the Arctic ocean.

Melting peat.

·       The Arctic system comprises large areas of land in Siberia, Canada, Alaska, northern Finland and Scandinavia and elsewhere within the Arctic Circle, including several trillion tonnes of carbon-rich organic peat that has existed for millennia as wet but frozen permafrost.

·       Arctic warming is two or three times faster than the global average, leading to large-scale melting of permafrosts and the decay of peat.

Methane release.

·       Decaying Arctic peat is releasing tens of billions of tonnes of methane annually, adding significantly to the 50 billion tCO2e released worldwide from all other sources.

·       At least 1.4 trillion tonnes of methane exist in frozen, water-bonded form in shallow sea-beds around the Arctic Ocean, and these molecules become unstable when warmed even slightly.

·       Methane degassing around the Arctic is already underway, and would be expected to increase dramatically with heating of the Arctic Ocean.

Fire.

·       As permafrosts melt, water is released and soils dry out, allowing land and forest fires to occur which are now underway throughout the Arctic Circle territories.

·       These fires release CO2 and smoke, soot from which darkens the remaining ice and speeds its melting under sunlight, contributing to the observed rapid melting of the Greenland ice cap.

7.         The Arctic tipping point

The melting and burning in the Arctic since 1979 is from the small amount of global heating so far, as a result of carbon emissions from industry and deforestation since about 1950 when the ‘carbon balance’ tipping point was reached for the biosphere as a whole. With no ice to absorb extra greenhouse heat in the 2030s, Arctic water will heat up very quickly, accelerating the melting and decay of permafrost peat, and the release of methane. Methane is much more potent as a GHG than CO2, so the sudden release of several trillion tonnes of it (i.e. a hundred trillion tonnes or more of tCO2e) during the 2030s and 2040s will greatly amplify the worldwide greenhouse effect, no doubt causing total climate chaos, decades of starvation, war and refugee movements, and the transformation of all societies and businesses. The forms of the Keeling Curve and Arctic ‘death spiral’ show that humanity has not yet taken any effective action to head off the Arctic tipping point. Moreover, we currently have no way to mitigate or undo such a rapid and massive methane release should it occur.

This strategic issue only came to prominence in 2016, with the publication of Peter Wadhams’ book A Farewell to Ice. We will clearly need to do several things at once about this, as a matter of the highest global importance. First, we must become much more effective at reducing net GHG emissions in general, to mitigate climate chaos and Arctic melting as far as possible. This is already a universal priority, at least in principle, with efforts focusing on decarbonising the world’s economy through renewable energy, energy efficiency, cleaner production, etc. They will need to be accelerated greatly through such measures as fixing a high, stable price for conserved carbon (to encourage decarbonisation investment), rationing emissions either directly and equitably, or through taxation and pricing, and using all available policy tools in whatever mix may be politically possible in each and every country.

Second, we must find ways to recapture GHGs from the air rapidly and at scale. Massive reforestation, forest rewilding and organic farming projects are vital (and can have additional benefits for biodiversity and ecological services), but are slow to implement and require carefully-crafted social arrangements to be effective (e.g. to resolve issues of land tenure and community motivation). But the Arctic issue shows that there is also a need to absorb a trillion tonnes or more of methane in the 2030s, so new technologies will also have to be developed in the 2020s. These would ideally, and obviously, be based on the discovery of catalysts to break down methane under open-air conditions into elemental carbon for safe storage out of contact with the air, and the roll-out of technologies to use them. The search for such catalysts could be started by a government or financial institution offering a large prize for their discovery. Why should this strategy not be driven by Malaysian financiers, scientists, and corporations?

Third, we must adapt to changes that cannot be avoided by strengthening ecological and social systems against climate chaos, recognising that stronger systems can survive some stresses that would destroy weaker ones. And fourth, the long-term goal must be to stabilise the human and biosphere system so that it becomes permanently able to prevent any repetition of the current imbalance. While the details of such a stable system cannot be predicted, its main features of social equity, participation, accountable governance, long-term precautionary thinking, sustainable use of renewable natural resources, and supportive values and belief systems can be anticipated, and its foundations can start to be built (and unhelpful foundations avoided).

These four priories can be summarised as being to minimise emissions, recapture emissions, adapt to chaos, and stabilise the human-biosphere relationship (MiRAS). Malaysia could develop the concept for a global MiRAS strategy for presentation at UNFCCC CoP 26 at Glasgow in 2020.

8.         Social risk and opportunity

The climate and ecological emergency was anticipated by far-sighted scientists in the 1960s, and became a scientific certainty in the 1970s, a popular cause in the 1980s, and the object of international agreements in 1992 with the signing of the UNFCCC and CBD. Progress since then, however, has been inhibited by various kinds of organised resistance. Angry frustration and fear of the consequences finally boiled over in August 2018, when Swedish schoolgirl Greta Thunberg (Figure 6) began her Climate Strike outside the parliament building in Stockholm, and over the following year several million other school-children became involved in similar actions.

Figure 6: Greta Thunberg as an icon of biosphere salvation (by Florence Thornton)

During 2019, Greta addressed parliaments and intergovernmental meetings across Europe and was nominated for the Nobel Peace Prize, and in September she travelled by yacht to New York to address the UN and begin a speaking tour of the Americas. Her movement broadened dramatically in October 2018 with the launch of the Extinction Rebellion (XR) in London, at which Greta spoke alongside a range of spiritual and ecological thought-leaders. The two movements have since reinforced one another, with millions of people involved in street protests and non-violent direct action on behalf of XR (Figure 7).

Figure 7: ‘The seas are rising and so are we’ – XR street protests in Bath, Bristol and London, 2019.

These protestors are scared, frustrated and angry, and they are unlikely to stand down because so many have been educated over years by David Attenborough and others, and because weather disasters and media reports around the world will continue, along with direct experience of heat-waves and storms. Hence the protests of 2018 and 2019 may be just the beginning of a growing and permanent wave of protest, focused on three primary demands:

  • for truth-telling based on the science, and official declarations of climate and ecological emergency;
  • for urgent action against GHG emissions, based on scientific realism (i.e. what is needed for survival) rather than political convenience (i.e. what is cheap and easy), with a binding, early goal of zero net carbon emissions; and
  • for governance reforms built on citizens’ assemblies, to provide leadership and participation in solving the climate and ecological emergency.

The XR and Climate Strike movements have induced some national parliaments and many local councils (including a majority of those in England) to declare ‘emergencies’ and commit themselves to zero net carbon goals. Some national governments, however (notably the USA and Brazil) have rejected these demands out of hand. While gaining experience and confidence, both XR and the Climate Strike movements have deepened their critiques of ‘business and politics as usual’, and articulated increasingly ambitious ideas for urgent change. As with any demanding mass movement, therefore, the challenge for government and business is to accept enough reform to defuse the protests without sacrificing orderly governance and elite prosperity. This situation has no precedent, however, in that the protestors are driven by an awareness of ecological reality and a wish for society to comply with the laws of nature, rather than solely by ideals of social justice.

In any case, these movements share a direction of travel with a number of more ‘establishment’ initiatives that are also pushing businesses and societies towards urgent action on the emergency. For example, from mid-October 2019 the Bank of England as a Prudential Regulation Authority will require all financial businesses to appoint people who are responsible and liable for climate risk, to allocate sufficient resources to deal with climate risk, to report transparently and accountably on the management of climate risk, and to provide evidence of compliance. As Ben Caldecott observed at the ‘Net Zero by 2050’ Conference at Rothamsted in September 2019, the policy implications of this are profound, opening the way to stronger policy signals to overcome loss aversion and encourage investment in climate resilience. As he concluded: “If ever there was an area where it would make sense to take money from the future and spend it now, this is it!”

9.         New social priorities for business

Science accurately describes ecological reality, and public alarm responds to a correct perception of that reality. Ignoring ecology is therefore no longer a viable option. Media reports are bound to encourage public anxiety and increase pressure on politicians and markets to ‘do something’ about the emergency. The costs of change are far higher now than they would have been in the 1990s, but meeting the need for change does not have to be a disaster for businesses. The efforts of XR, Climate Strike, Bank of England and other institutions and individuals are yielding new values and social priorities that are likely to respect survival, equity and honesty more than consumption, competition and choice. These will yield new basic laws and economic theories, new responses to business misbehaviour, and new expectations of how a creditworthy business ought to act (Tables 4-6). Businesses that adapt to this new social environment, and that also survive climate chaos, ecological breakdown and mass extinction, should become or remain profitable – and those that find new and appropriate niches in the emergency and the (hoped-for) post-emergency economy may do well.

Table 4: Emerging expectations of basic law and economic theory
Prohibiting ecocide, to make ecocide – the deliberate or negligent destruction of natural ecosystems and species – a criminal act under international law.
Peace with Nature, to amend or write national constitutions to place the laws of ecology above human laws (i.e. that ‘parliament is sovereign, but nature is supreme’).
Wellbeing economy, to re-write the assumptions of economics and policy (e.g. in Scotland, Iceland and New Zealand) in line with new criteria for long-term public well-being and ecological health.
Table 5: Emerging responses to business misbehaviour
If a business is not seen to comply with the new social priorities then it may be punished by consumer boycotts or direct action.
If a business simply cannot comply, for example if its business model is based on air travel by jet, it may be abandoned by its customers.
If a business does not comply with legal requirements on reporting its climate actions and vulnerabilities, then it may be fined or suspended from trading.
If politicians (or markets) adopt a precautionary approach to ecological tipping points, then some asset values can collapse suddenly and completely.
Table 6: Emerging expectations of creditworthy businesses
Homework. Businesses should actively seek to discover their unique strengths and weaknesses, vulnerabilities and opportunities in the climate emergency.
Knowledge. Businesses should hire the best available ecological minds to engage with ecological reality, and to demonstrate a willingness to change.
Partnerships. Businesses should reach out and build genuine partnerships with public, academic and other institutions, and with shareholders and regulators.
Leadership. Businesses should encourage, enable and re-educate governments to help them adapt through fair and sensible regulation to the new rules of the climate emergency.

10.        Nature cannot be fooled

The Keeling Curve and Arctic ‘death spiral’ are top-level indicators of the state of the biosphere. They trace the net effect of trillions of actions and transactions that month by month affect the physical chemistry of the living world. They report an imbalance in human activity relative to all other organisms and processes on Earth, and in their present forms they imply a catastrophic near future for humanity and all other life on Earth. Over coming decades, the Keeling Curve must be flattened out and start to fall, and the lines representing Arctic summer sea ice volume must cease their orbit toward zero.

It is tempting to say that nothing else matters, but this is not so. Our aim should be to achieve these things while also laying the foundations of a benign human-biosphere relationship, and ideally a benign human-human relationship was well. We should do nothing in the short term that prevents our learning the lessons that we will need in the long term. On the other hand, we must save ourselves so that we can re-grow, and as much as possible of nature so that she can re-grow (making recovery of the LPI necessary as well).

And these acts of salvation must be real; there is no longer any role for greenwashing or pretend marketing. A mixed strategy is called for, based around the MiRAS priorities: minimising GHG emissions, recapturing past emissions, adapting to change by strengthening social and ecological systems, and refashioning human society and our relationship with nature. It is of course possible to list parts of such a mixed strategy, where businesses, investors, regulators and broader society can collaborate to take specific measures to reduce GHG emissions (Table 7) and adapt to chaos (Table 8). Of these, the adaptation opportunities are least understood, since we cannot always know what will work best in chaotic conditions, but we can take a precautionary approach and use ecological common sense to build resilience. A current book project to clarify these matters is outlined in Box 2.

Table 7: Three kinds of opportunity in minimising net GHG emissions
Finding the catalysts needed to break down GHGs into elemental carbon in open-air conditions, and in mass-producing the negative-emission technology to use them effectively (with methane as top priority because of the Arctic methane eruption).
Contributing to decarbonising the economy, with businesses finding out (often with the advice of lenders, government and UN knowledge management systems) where they can make real emission savings from renewable energy, energy efficiency, insulation, recycling, etc.
Protecting forests and planting trees – that is, large areas of native species to sustain local biodiversity, and to protect them against pests and fire (large-scale reforestation and rewilding being an effective way to trap carbon, save biodiversity, and restore ecological services), usually best done with the full participation of local communities and in their own interests.
Table 8: Three kinds of opportunity in adapting to climate chaos
In the forestry and land use sectors, managing and restoring water catchments and ecosystem defences against floods, storms, fires and the spread of deserts, usually best done through partnerships with the societies affected and involved.
In the public health, health care and biomedical sectors, developing preventative and curative systems and medicines with which to anticipate and respond to the medical effects of climate chaos (including water-borne diseases, new vectors and disease profiles, and heat waves).
In the agriculture sector, since ecosystems full of wild species tend to resist diverse stresses better than simple systems, and they also store more soil carbon, organic farming as a way to meet aims for food (sustainable diversification), health (pesticides and disease vectors), biodiversity (preserving the web of life), adaptation (soil restoration and catchment protection) and mitigation (soil carbon capture).
Box 2: Adapting to Climate Chaos by Strengthening Ecological and Social Systems
This book by Julian Caldecott, recently commissioned by Cambridge University Press, aims to discuss the problems of anticipating chaotic change. It will present evidence from evaluated aid programmes that the fragility of these complex systems can be reduced by promoting public understanding of ecology, the sharing of knowledge, and locally-accountable leadership. These topics have extreme urgency since climate chaos, mass extinction and ecosystem breakdown are recognised features of our immediate future, and tipping points in major systems such as the Arctic and Amazon are imminent. While accepting the need to bring GHG emissions under strict control, adaptation is also a priority, especially for those concerned with sustainable development. Simple engineering solutions are often not enough, and the aim is to describe effective new ways to make it easier for citizens, leaders and aid professionals to make replicable strategic choices that reliably strengthen ecosystems and societies.

Lists such as those in Tables 7 and 8 are indicative. It is better for people to study ecology and understand how everything fits together and influences each other, so that wise decisions can be made consistently and well. The good news is that ecology is not hard to understand, and public opinion and regulations are changing to make it easy – and necessary – to pay more attention to it. When people elect ecologically-aware lawmakers, then businesses can hire ecologists just as fast as they hire lawyers and accountants. Also, while nature is remorseless and all-powerful when provoked, she has great power to help put things right again if people allow it. Human ingenuity and enterprise may be able to do the rest.

© Julian Caldecott, Schumacher Institute for Sustainable Systems