New Evidence That Climate Change Poses a Much Greater Threat to Humanity Than Recently Understood Because the IPCC has been Systematically Underestimating Climate Change Risks: An Ethical Analysis

 

Three papers have been recently published that lead to the conclusion that human-induced climate change poses a much more urgent and serious threat to life on Earth than many have thought who have been relying primarily on the conclusions of the Intergovernmental Panel on Climate Change (IPCC). This paper first reviews these papers and then examines the ethical questions by the issues discussed in these papers.

I. The Three Papers

On July 31, 2018, a paper was published in the Proceedings of the National Academy of Sciences which should create a shiver of fear in all humans everywhere. The paper, Trajectories of  the Earth System in the Anthropocene by Steffen et.al., explains how human-induced warming is rapidly approaching levels that may trigger positi climate feedbacks which could greatly accelerate the warming already plaguing the world by causing record floods, deadly heat waves and droughts, increasing tropical diseases, forest fires, more intense and damaging storms, sea level rise, coral bleaching, and acidification of oceans, all of which are contributing to increasing the number of refugees which are destabilizing governments around the world. This paper explains that, contrary to common assumptions made by many in the international community that positive feedbacks in the climate system that could cause abrupt temperature increases would not likely be triggered if warming could be limited to 20 C above pre-industrial levels, positive feedbacks could be initiated between current temperatures and 20 C. Moreover, once triggered the additional warming caused by these feedbacks could initiate other feedbacks creating a cascade of positive feedbacks, each of which could speed up the warming which is already causing great harm and suffering around the world. The paper claims this mechanism could make life on much of the Earth uninhabitable which could lead to social collapse on the global scale and ultimately to warming increases that human reductions of greenhouse gases (ghg) emissions alone would not prevent until the global system reached a new temperature equilibrium at much higher temperatures than the human race has ever experienced. In other words, cascading positive feedbacks in the climate system could result in humans losing control over preventing disastrous warming.

Another recent paper published in mid-August in Nature Communications by Anthony et. al., 21st-Century Modeled Permafrost Carbon Emissions Accelerated by Abrupt Thaw Beneath Lakes, concludes that models used to predict climate impacts have failed to incorporate abrupt carbon feedback from permafrost decay that recent evidence has revealed is now possible. In fact, the paper claims that early stages of processes that lead to permafrost degradation are already underway, a phenomenon which leads to release of dangerous amounts of methane and CO2. This paper further concludes that carbon emissions from melting permafrost could increase soil carbon emissions by 125–190% compared to gradual thaw alone.

This paper summarizes major conclusions from a third recent paper which analyzes IPCC’s consistent underestimation of climate change impacts. This paper, What Lies Beneath: On the Understatement of Existential Climate Risk, (hereinafter “WLB”), recently published by the Breakthrough Institute, claims both that the risks posed by climate change are far greater than is evident from the conclusions of IPCC and examines why IPCC has frequently underestimated threats from climate change.

The WLB report also further concludes that climate change is now an existential risk to humanity, that is an adverse outcome that could either annihilate intelligent life or permanently and dramatically curtail its potential. (WLB, p.13)

Although the WLB report acknowledges IPCC has done “critical, indispensable work of the highest standard in pulling together a periodic consensus of what must be the most exhaustive scientific investigation in world history” however, the IPCC process suffers from all of the dangers of consensus-building in such a wide-ranging and complex arena. (WLB, p. 5) The report also attributes the overly conservative conclusions of the IPCC to the consensus building nature that IPCC must follow to get governments to approve IPCC final reports and to IPCC’s following scientific norms that condemn speculation. (WLB. p. 5) As a result, the report concludes that much of the climate research on which IPCC has relied has tended to underplay climate risks and as a result, IPCC has exhibited preferences for conservative estimates of climate change impacts. (WLB, p. 5)  This practice the WLB reports labels as “scholarly reticence.” (WLB, p. 5)

This WLB report further claims that climate science has succumbed to the norm followed by most physical sciences to refrain from any speculation that cannot be grounded in empirically determined probability calculations. This epistemic norm, the report claims, is not well-suited to guide predictions about very scientifically complex matters such as earth system dynamics. The report calls this approach the Probability Obsession of science which is not well suited to predict future states of complex systems about matters for which there are no historical antecedents. (WLB, p. 2)

The WLB report also notes that a conservative approach to climate science began to dominate and as a result, the planetary future has become a hostage to national economic self-interest. Thus, the paper claims it became “alarmist” to claim the climate change is an existential threat to life on earth. (WLB, p.4)

The report further notes that although “a fast emergency-scale transition to a post-fossil fuel world is absolutely necessary to address climate change…. yet this is excluded from consideration by policymakers because it is considered to be too disruptive.” And so the paper claims “we have a policy failure of epic proportions.”  (WLB, p. 4)

The WLB report further notes that although it has widely been reported that if the ghg emissions reductions commitments or Nationally Determined Commitments (NDCs)  made by governments so far under the Paris Agreement are complied with, the Earth’s temperature is expected to rise to  3.40 C by 2100 without taking into account “long-term” carbon cycle feedbacks. (WLB, p.15) Yet if the positive feedbacks are fully considered, the temperature path defined by the NDCs could result in around 5° C of warming by 2100 according to a MIT study. (WLB, p.13) Yet, the report claims that even if warming reaches 3° C, most of Bangladesh and Florida would drown, while major coastal cities – Shanghai, Legos, Mumbai – would be swamped likely creating larger flows of climate refugees. Most regions of the world would see a significant drop in food production and an increasing number of extreme weather events, whether heat waves, floods or storms. (WLB, p.13)

The WLB report concludes warming of 4°C or more could reduce the global human population by 80% or 90%, and the World Bank reports “there is no certainty that adaptation to a 4°C temperature rise would be possible.” Quoting Professor Kevin Anderson, the report claims a 4°C future “is incompatible with an organized global community and is likely to be beyond adaptation by the majority of people.” (WLB, p. 14)

The WLB report also claims that the often-quoted prediction of likely temperature increases if current NDCs are complied with of approximately 3° C rise does not take into account the considerable risk that self-reinforcing feedback loops could be triggered when certain thresholds are reached leading to an ever-increasing rise in temperature. These potential thresholds include the melting of the Arctic permafrost releasing methane into the atmosphere, forest dieback releasing carbon currently stored in the Amazon and boreal forests, with the melting of polar ice caps that would no longer reflect the light and heat from the sun. (WLB, p. 14)

The report cites a recent study by the European Commission’s Joint Research Center found that if global temperature rose to 4° C that extreme heat waves with “apparent temperatures” peeking over 550 C (1310 F) will begin to regularly affect many densely populated parts of the world, forcing much activity in the modern industrial world to stop. (WLB, p.14)

The paper claims that one study found that even a 2° C warming “would double the land area subject to deadly heat and expose 48% of the population to deadly heat.” (WLB, p.14)

According to the WLB report, a 4° C warming by 2100 would subject 47% of the land area and almost 74% of the world population to deadly heat which could pose existential risks to humans and mammals alike unless massive adaptation measures are implemented. (WLB, p.14)

The WLB paper also explains how IPCC’s understatements of likely climate change impacts affect what is generally claimed among climate policy-makers about elements of climate science including climate models, climate tipping points, climate sensitivity, carbon budgets, permafrost and carbon cycles, arctic sea ice, polar ice-mass loss, and sea-level rise. The following summarizes some of the main paper’s conclusions on these matters, although we recommend that interested parties read the WLB’s full description of these issues. The full paper also should be consulted for footnote sources of the following conclusions.

Climate Models

Climate modeling is at the core of the work by IPCC, and in developing future emission and warming scenarios a 2007 report by the US Center for Strategic and International Studies Center for New American Security recognized the that: “Recent observations indicate the projections from climate models have been too conservative,” and  “the effects of climate change are unfolding faster and more dramatically than expected,” and, “multiple lines of evidence support the position that the 2007 IPCC reports’ projections of impacts are systematically biased low.” (WLB, p.18) For instance, the paper concludes:

The models used to project future warming either omit or do not account for uncertainty in potentially important positive feedbacks that could amplify warming (e.g., release of greenhouse gases from thawing permafrost, reduced ocean and terrestrial CO2 removal from the atmosphere, and there is some evidence that such feedbacks may already be occurring in response to the present warming trend. Hence, climate models may underestimate the degree of warming from a given amount of greenhouse gas emitted into the atmosphere by human activities alone. Additionally, recent observations of climate system responses to warming (e.g. changes in global ice cover, sea level rise, tropical storm activity) suggest that IPCC models underestimate the responsiveness of some aspects of the climate system to a given amount of warming. (WLB, p.18)

Climate models simply omit emissions from warming permafrost, but we know that is the wrong answer because this tacitly assumes that these emissions are zero and we know that’s not right. (WLB, p.18)

The WLB report characterizes IPCC reports as presenting “detailed, quantified (numerical) modeling results-such as feedbacks that the models account for in a descriptive non-quantified form. Sea-levels, polar ice sheets, and some carbon-cycle are three examples. Because policymakers and the media are often drawn to the headline numbers, this approach results in less attention being given to the most devastating, high-end, non-linear and difficult to quantify outcomes.” (WLB, p. 19).

The WLB report concludes about this tendency: “The emphasis on consensus in IPCC reports has put the spotlight on expected outcomes which then become anchored via numerical estimates in the minds of policymakers.” (WLB, p. 19)

The WLB report also notes that one of the problems with IPCC is the strong desire to rely on physical models. (WLB, p. 20)

Tipping Points

A tipping point may be understood as the passing of a critical threshold in the earth climate systems component – such as major ocean and atmospheric circulation patterns, the polar ice sheet, and the terrestrial and ocean carbon stores – which produces a steep change in the system. (WLB, p. 21) Progress toward a tipping point is often driven by positive feedbacks, in which a change in the component leads to further changes that eventually “feedback” onto the original component to amplify the effect. A classic case is global warming is the ice-albedo feedback, or decreases in the area of polar ice change surface reflexivity, trapping more heat, producing further sea ice loss. (WLB, p. 21)

In some cases, passing one threshold will trigger further threshold events, for example, where substantial greenhouse gas releases from polar permafrost carbon stores increase warming, releasing even more permafrost carbon in a positive feedback, but also pushing other systems, such as polar ice sheets past their threshold point. (WLB, p. 21)

In a period of rapid warming, most major tipping points, once crossed are irreversible in human time frames, principally due to the longevity of atmospheric CO2 (a thousand years). (WLB, p. 21)

Climate models are not yet good at dealing with tipping points. (WLB, p.21) This is partly due to the nature of tipping points, where particularly complex confluence of factors abruptly change the climate system characteristics and drive it into a different state. (WLB, p.21) To model this, all the contributing factors and their forces have to be well identified, as well as their particular interactions, plus the interactions between tipping points. (WLB,  p.21)  Some researchers say that “complex, nonlinear systems typically shift between alternative states in an abrupt, rather than the smooth, changes, a challenge that the climate models have not yet been able to adequately meet. (WLB, p. 21)

Risks associated with tipping points increase disproportionately as temperature increases from 1° C to 2° C and become high above 3° C. Yet political negotiations have consistently disregarded the high-end scenarios that could lead to abrupt or irreversible climate change. (WLB, p. 21)

IPCC has published few projections regarding tipping-point thresholds, nor emphasized the importance of building robust risk-management assessments of them in absence of adequate quantitative data. (WLB, p. 210)

The world is currently completely unprepared to envision and even less deal with the consequences of catastrophic climate change. (WLB, p. 21)

Climate Sensitivity

Climate sensitivity is the amount by which the global average temperature will rise due to a doubling of atmospheric greenhouse gas levels, at equilibrium. IPCC reports a focus on what is generally called equilibrium climate sensitivity (ECS). The 2007 IPCC report gave a best estimate of climate sensitivity of 3° C and said it is likely to be in the range 2° C to 4.5° C. (WLB, p. 22)

The 2014 IPCC report says that “no best estimate for equilibrium climate sensitivity can now be given, because of lack of agreement on values across lines of evidence and studies” and only gives a range of 1.5° C to 4.5° C. (WLB, p. 22)

The IPCC reports fail to mention that the ECS measure omits key “long-term” feedbacks that a rise in the planet’s temperature can trigger. (WLB, p. 22) These include the permafrost feedback, other changes in the terrestrial carbon cycle, a decrease in the ocean’s carbon-sink efficiency, and the melting of polar ice sheets creating a cold ocean-surface layer underneath that accelerates the melting of ice shelves and hastens the rate of ice-mass loss. (WLB, p. 22)

There is a wide range of literature that suggests that climate sensitivity which includes these feeedbacks-known as Earth System Sensitivity (ESS), is 4-6 0 C. (WLB, p. 22).

Long-term feedbacks have already begun to appear on short time frames, climate-carbon cycle coupling is expected to add carbon to the atmosphere as the climate warms, although the magnitude of feedback is uncertain. (WLB, p. 22)

Conclusions about climate sensitivity should take into account that:

  1. Biogeochemical feedbacks (such as less efficient land-ocean sinks, including permafrost loss) effectively increases carbon emissions to 2100 by about 20% and can enhance warming by up to 0.5°C, compared to the baseline scenario. (WLB, p. 23)
  2. Warming has been projected to increase methane emissions from wetlands by 0 – 100% compared with present-day wetland methane emissions. A 50% increase in wetland methane emissions by 2100 is expected in response to high-end warming of 4.1 – 5°C which could add at least another 0.5°C warming. (WLB, p. 23)
  3. It is important to use high-end climate sensitivity because some studies have suggested the climate models have underestimated three major positive climate feedbacks: positive ice albedo feedback from the retreat of Arctic sea ice; positive cloud albedo feedbacks from retreating storm track clouds in mid-latitudes, and positive albedo feedback by the next phase (water and ice) clouds. When these are taken into account the ECS is more than 40% higher than the IPCC mid-figure, at 4.5 to 4.7° C. (WLB, p. 23)

Some recent research concludes that climate sensitivity is higher in warmer, interglacial periods (such as present) and lower in colder glacial periods. Based on a study of glacial cycles and temperatures over the last 100, 000 years one study concludes that in warmer periods climate sensitivity is 4.88 0 C. (WLB, p. 23) The higher figure would mean that an atmospheric concentration 450 ppm CO2, a figure that current trends will reach in 5 years, would be around 30 C in rather than the 20 C number bandied about in policy making circles. (WLB, p. 23)

Carbon Budgets

A carbon budget is the estimate of the total future human-caused ghg emissions in tons of CO2 or CO2 equivalent, that would be consistent with limiting warming to a specific figure, such as

1.5 0 C or 20 C with a given risk of exceeding the target such as 50%, 33%, or a 10% chance. (WLB, p. 24)

Carbon budgets are usually based on mid-term climate sensitivity numbers of around 30 C. (WLB, p. 22)

Yet there are reasons to believe climate sensitivity is closer to 4C. In fact, as we have seen, climate sensitivity may be between 4-60 C. (WLB, p. 22)

Carbon budgets are routinely proposed that have a substantial and unacceptable risk of exceeding specified targets and hence entail large and unmanageable risks of failure., (WLB, p. 24)

Research in 2017 the compared role climate models used by IPCC with models that are “observationally informed” produce 15% more warming by 2100 than IPCC claims and therefore supports the conclusion that carbon budgets should be reduced by 15% for the 20C target. (WLB, p. 24)

The IPCC reports fail to say that once projected emissions from future food production and deforestation are taken into account there is no carbon budget for fossil-fuel emissions for a 20C target. (WLB, p. 24).

There are also problems with carbon budgets which incorporate “overshoot” scenarios, in which warming exceeds the target before being cooled by carbon drawdown. (WLB, p.24)  Pam Pearson, Dir. of International Cryo-sphere Climate Initiative, said that most cryo-sphere thresholds are determined by peak temperatures, and the length of time spent at the peak warning rather than “later decreasing temperatures after the peak are largely irrelevant, especially with higher temperatures and longer duration peaks.” Thus “overshoot scenarios” which are now becoming the norm in policymaking hold much greater risks. (WLB, p. 24)

Permafrost and the Carbon Cycle

The failure to adequately consider long-term feedbacks in IPCC models, and hence in projections of future warming, lies at the heart of the problem with the IPCC reporting process. (IPCC, p.25) Over century time-scales, amplifying feedbacks may ultimately contribute 28-68% of total warming, yet they comprise only 1-7% of current warming. (WLB, p. 25)

The land sink (storage capacity) for CO2 appears much smaller than is currently factored into some climate models. Thus future patterns of warming may be distinctly different from past patterns making it difficult to predict future warming by relying on past observations. (WLB, p. 25)

Soil Carbon. A 2016 study concluded that a soil carbon cycle feedback “has not been incorporated into computer models used to project future climate change, raising the possibility that such models are underestimating the amount of warming that is likely to occur. (WLB, p. 24) The projected loss of soil carbon from climate change is a potentially large but highly uncertain feedback to warming, however, there is likely to be strong carbon-climate feedbacks from colder northern soils. (WLB, p.24)

Forests. At the at the moment about one-third of human-caused CO2 emissions are absorbed by trees and other plants. But rapid climate warming and unusual rainfall patterns are jeopardizing many of the world’s trees, due to more frequent droughts, pest outbreaks, and fires. (WLB, p. 25) This is starting to have profound effects on the Earth’s carbon cycle. (WLB, p. 25)  In 2009 researchers found that 2° C of warming could cut in half the carbon sink of tropical rainforests. Some tropical forests – in the Congo and Southeast Asia – have already shifted to a net carbon source. The tropics are now a net carbon source with losses owing to deforestation and reductions in carbon density within standing forests being double that of gains resulting from forest growth. Other work has projected a long-term, self-reinforcing carbon feedback from mid-latitude forests to the climate system as the world warms. (WLB, p. 25)

There has been an observed decline in the Amazon carbon sink.  Negative synergies between deforestation, climate change, and widespread use of fire indicate a tipping point for the Amazon system to flip to non-forest ecosystems in eastern, southern, and central Amazonia at 20 – 25% deforestation. Researchers say that severe droughts of 2005, 2010 and 2015-16 could well represent the first flickers of this ecological tipping point and say the whole system is oscillating. (WLB, p.25)

Permafrost. The world’s permafrost holds 1.5 trillion tons of frozen carbon, more than twice the amount of carbon in the atmosphere. On land it covers an area of 15,000,000 km². The Arctic is warming faster than anywhere on earth, and some permafrost degradation is already occurring. Large-scale tundra wildfires in 2012 added to the concern, as have localized methane outbursts. (WLB, p. 25)

The 2007 IPCC assessment on permafrost did not venture beyond saying “changes in snow ice and frozen ground have with high confidence increase the number and size of glacial lakes, increased ground instability in mountain and other permafrost regions and led to changes in some Arctic and in Antarctic ecosystems. It reported with high confidence that methane emissions from tundra and permafrost have accelerated in the past two decades and are likely to accelerate further. It offered no projections regarding permafrost melts. (WLB, p.25).

The effect of the permafrost’s carbon feedback has not been included in the IPCC scenarios including the 2014 report. (WLB, p. 26). This is despite clear evidence that “the permafrost carbon feedback would change the Arctic from a carbon sink to a source after the mid-2020s and is strong enough to cancel 42 – 88% of the total global land sink. (WLB, p. 26)

In 2012, researchers found that, for the 2100 median forecasts, there would be a 0.23 – 0.27°C of extra warming due to permafrost feedbacks. Some researchers consider that 1.5°C appears to be something of a “tipping point” for extensive permafrost thaw. (WLB, p.26)

A 2014 study estimated that up to 205 billion tonnes equivalent of CO2 could be released due to melting permafrost, This would cause up to 0.5° C extra warming for the high mission scenario and up to 0.15° C of extra warming for the 2° C scenario. The authors say that; “climate projections in the IPCC Fifth Assessment report, and any emissions targets based on these projections, do not adequately account for emissions from thawing permafrost and the effect of the permafrost carbon feedback on global climate. (WLB, p.26)

Recently attention has turned to the question of the stability of large methane hydrate stores below the ocean floor on the shallow East Siberian Arctic shelf. (Methane hydrates are cage-like lattices of ice within which methane molecules are trapped). (WLB, p. 26)

These stores are protected from the warmer ocean temperatures above by a layer of frozen sub-sea permafrost. The concern is that warmer water could create taliks (areas of unfrozen permafrost) through which large-scale methane emissions from the hydrates could escape into the water column above and into the atmosphere. (WLB, p. 26)

A deceptively optimistic picture is painted when the potential impacts from the degradation of permafrost and methane hydrates are underplayed. (WLB, p. 26)

Arctic Sea-Ice

IPCC has consistently underestimated the rate of Arctic sea ice melt. (WLB, p.27)

Arctic sea ice is thinning faster than every IPCC climate projection, tipping points have been crossed for sea ice free summer conditions, and today scientists say an ice-free Arctic summer could be just years away, not many decades. (WLB, p. 27)

The loss of sea ice reduces the reflectivity of the planet and adds to warming but this feedback is not fully incorporated into models in circumstances where the rate of sea-ice loss is more rapid than expected in the models, as is occurring now. (WLB, p.27) To keep global temperature increase below 20 C, global CO2 emissions would need to reach zero 5-15 years earlier and the carbon budget would need to be reduced by 20-51% to offset this additional source of warming. (WLB, p. 27)

Because climate models are missing key real-world interactions and generally have been poor at dealing with the rate of Arctic sea ice retreat, expert elicitation’s play a role in considering whether the Arctic has passed a very significant and dangerous tipping point. But the IPCC has done none of this. (WLB, p.27)

Polar Ice-Mass Loss

2001 IPCC report said little change in Greenland and Antarctic ice sheet is expected over the next 50-100 years.  (WLB, p. 28)

Greenland Ice Sheet

The 2007 IPCC report said there were “uncertainties in the full effects of ice sheet flow” and a suggestion that “partial loss of ice sheet on polar land could imply meters of sea-level rise….Such changes are projected to occur over millennial time scales.” The reality is very different.” (WLB, p. 28)

IPCC said in 2007 that current models suggest virtually complete elimination of the Greenland ice sheet and a resulting contribution to sea-level rise of about 7 meters if global warming were sustained for millennia in excess of 1.9 to 4.60 C relative to pre-industrial values. (WLB, p. 28) This was despite that two 2006 studies found that the Greenland ice cap “may be melting three times faster than indicated by previous measurements, warning that we are close to being close to being committed to a collapse of the Greenland ice cap and reports that rising Arctic regional temperatures are already at “ the threshold beyond which glaciologists think the [Greenland] ice sheet may be doomed.” (WLB, p. 28)

In 2012 then NASA climate science chief James Hansen told Bloomberg that: “our greatest concern is that the loss of Arctic sea ice creates a great threat of passing over passing two other tipping points – the potential instability of the Greenland Ice Sheet and methane hydrates…These latter two tipping points would have consequences that are practically irreversible on time scales of relevance to humanity.’ On this very grave threat, IPCC is mute. (WLB, p. 29)

Antarctic Ice Sheet

The 2007 IPCC assessment proffered: “Current global model studies project that the Antarctic ice sheet will remain too cold for widespread surface melting and gain mass due to increased snowfall.” (WLB, p. 29) However, the net loss of ice mass could occur if dynamical ice discharge dominates the ice sheet mass balance. Reality and new research would soon undermine this one-sided reliance by IPCC on models with poor cryosphere performance. (WLB, p. 29)

By the 2014 IPCC assessment, the story was: “Based on current understanding from observations, physical understanding, and modeling, only the collapse of the marine-based sectors of the Antarctic ice sheet, if initiated could cause global mean sea level to be substantially above the likely range during the 21rst Century.” (WLB, p. 29) There is medium confidence that the additional contribution would not exceed several tenths of a meter of sea-level rise during the 21rst Century. And “abrupt and irreversible ice loss from the Antarctic is sheet is possible, but current evidence and understanding is insufficient to make a quantitative assessment.” This was another blunder. Observations of accelerating ice mass in West Antarctic were well established by this time. (WLB, p. 29) It is likely that the Amundsen Sea sector of the West Antarctic ice sheet has already been destabilized. (WLB, p. 29) Ice retreat is unstoppable for current conditions, and no acceleration in climate change is necessary to trigger the collapse of the rest of the Antarctic Ice Sheet, which comes with a 3-5 meter sea level rise. (WLB, p. 29), Such an event would displace millions of people worldwide. (WLB, p. 29)

In 2016, another significant study concluded that: “Antarctica has the potential to contribute more than a meter of sea-level rise by 2100 and more than 15 meters by 2500.” Compare this to the IPCC report, just a year earlier, that Antarctica’s contribution to sea levels “ would not exceed several tenths of a meter…during this century. ” (WLB, p. 29) As well, partial deglaciation of the East Antarctic ice sheet is likely for the current level of atmospheric CO2 contributing ten meters or more of sea-level rise in the longer run, and five meters in the first 200 years. (WLB, p. 29)

A 2018 study showed that ocean-driven melting has caused rates of ice-loss from West Antarctica to triple from 53 + or – 29 billion to 159 + or – 26 billion tons per year from 1992 to 2017. (WLB, p. 29) Forty percent of the total mass loss over that period has occurred in the last and five years, suggesting a recent and significant acceleration in the loss rate. (WLB, p. 29)

Over the same period, ice-shelf collapse had increased the rate of ice loss from the Antarctic Peninsula almost five-fold from 7 + or – 13 billion to 33 + or- 16 billion tonnes per year. (WLB, p. 29)

Sea Level Rise

In the 2001 assessment report, the IPCC projected a sea-level rise of 2 millimeters per year. By 2007, the researchers found that the range of the 2001 predictions were lower than the actual rise. Satellite data had shown that sea levels had risen by an average of 3.3 millimeters per year between 1993 and 2006. (WLB, p. 30) IPCC did not use this data to revise its projections. (WLB, p. 30) James Hansen warned of “scientific reticence” in regard to ice sheet stability and sea-level rise. (WLB, p. 30) In 2008, the US Geological Survey warned that sea-level rise could top 1.5 meters by the end of the century. And by the end of 2009, various studies offered drastically higher projections than IPCC. (WLB, p. 30) The Australian government identified research that estimated sea level rise range from 0.5 to 2.0 meters by 2100. (WLB, p. 30) Yet in 2014, IPCC reported a smaller figure (0.55 meters compared to 0.59 meters in 2007) despite mounting evidence of polar ice-mass loss. (WLB, p. 30) Noting inconsistent evidence, IPCC said that the probability of specific levels above the likely range cannot be evaluated. (WLB, p. 30)

An NOAA sea level report in August of 2017 recommends a revised worst-case sea level scenario of 2.5 meters by 2100, 5.5 meters by 2150 2150, and 9.7 meters by 2200. (WLB, p. 31)

Today the discussion among experts is for sea-level rise in this century of at least one meter, and perhaps in excess of two meters. (WLB, p. 31)

Goals Abandoned

The WLB report claims that the warming levels already reached at approximately 1.10 C are already “dangerous” and that future warming would need to be limited to 1.20 C to save the Great Barrier Reef. (WLB. p. 37) Therefore, the WLB report concludes that the UNFCCC process has already abandoned the goals of the UNFCCC of “preventing dangerous interference with the climate system.” The report also argues that other key goals of the UNFCCC including that “food production is not threatened’’ and “achieving reductions in a time frame sufficient to allow ecosystems to adapt naturally to climate change” have been abandoned for all practical purposes.”

Conclusion-Ethical Issues Raised by IPCC’s Consistent Underestimation of Climate Change Impacts.

A. Failure to Apply a Precautionary Science

As we have seen, the “What Lies Beneath” Report attributes IPCC’s consistent underestimation of climate change impacts to both the consensus process that IPCC follows in which governments must approve aspects of final IPCC reports and to IPCC’s following norms often followed by scientists which eschew making any claims that cannot be supported by empirically tested observations.

As we have claimed before in Ethicsandclimate.org, there is a potential conflict between IPCC’s mission to synthesize the peer-reviewed climate change scientific literature, which normally requires adequate levels of scientific proof before drawing conclusions, and the precautionary principle stated in article 3 of the United Nations Framework Convention on Climate Change (UNFCCC), which requires governments to act despite scientific uncertainties. A precautionary science would identify all scientifically plausible impacts, not only those impacts that can be identified with high levels of scientific certainty or impacts about which quantitative probability statements derived from empirical observations can be stated.  If the precautionary principle is to be taken seriously then decision-makers should be informed about all potentially dangerous impacts even if quantitative probability statements about these impacts can’t be derived from observations of how a physical system works.  Since the UNFCCC expressly adopted the precautionary principle, a strong case can be made that IPCC should identify all scientifically plausible impacts. If it were to do this, IPCC should, of course, be clear that some impacts are less certain than others.

Identifying all scientifically plausible climate impacts is also required as a matter of ethics once there is a reasonable basis for concluding that certain human behavior is dangerous to others.

Who should have the burden of proof and how much proof should be required to satisfy the burden of proof in the face of scientific uncertainty about dangerous behavior are fundamentally ethical questions, not ‘value-neutral’ scientific matters, yet scientists are rarely trained in ethical reasoning and very rarely spot the ethical issues raised by decisions about dangerous human behavior that must be made in the face of scientific uncertainty.  Given that the potential harms from climate change include an existential threat to life on Earth, as a matter of ethics, those who claim that scientific uncertainty is justification for not taking strong action to reduce the threat of climate change should have the burden of proof of demonstrating with very high levels of proof that ghg emissions levels are safe.

Ethics would require higher levels of proof of those who are engaged in dangerous behavior to prove their behavior is safe in proportion to how potentially dangerous the behavior is especially for harms to others who have not consented to be harmed and for behaviors that become more dangerous the longer one waits to reduce the uncertainty. Given that climate change actually threatens life on Earth including billions of people who have not consented to put at risk, and given that waiting to reduce ghg emissions makes the problem more threatening, ethics would shift the burden of proof to those who are most responsible for raising ghg emissions to prove with very high levels of proof that human emissions of ghg are safe even if there is some uncertainty about the amount of warming that different levels of ghg emissions will cause. For this reason, the problem created by IPCC’s underestimation of climate change impacts may not be exclusively the fault of IPCC.  The problem may also be the fault of policymakers who fail to respond to the enormous potential harms entailed by human-induced warming by demanding that opponents of climate change policies shoulder the burden of proof by demonstrating with high levels of proof that ghg emissions will not cause serious harms.

This website includes many articles which explain why policymakers and citizens have a strong duty to reduce ghg emissions in the face of some scientific uncertainty about climate change impacts. See, for example:

1. The Ethical Duty to Reduce Greenhouse Gas Emissions the face of Scientific Uncertainty;

2. On Confusing Two Roles of Science and Their Relation to Ethics.

Policymakers have a vital need for scientists to explain all scientifically plausible harms that may result from human activities even if the magnitude and creation of potential harms are uncertain. In fulfilling these responsibilities, scientists may not ignore potential harms because they are unable to determine probabilities about the likelihood of their occurrence based on empirical observations. Yet because scientists often follow the epistemic norms of their science when engaged in scientific research which usually require adequate levels of proof before making causal claims, policymakers need to be clear when interacting with scientists that their policymaking responsibilities require that they, the policymakers, protect citizens from all plausible harms.  Therefore policymakers need scientists to identify all scientifically plausible harms. Because IPCC’s mission is to synthesize the existing peer-reviewed climate science, which very likely does not include scientific conclusions about plausible harms partly based on speculation, IPCC cannot fulfill the role of science that policymakers need when policymakers are seeking to protect citizens from all plausible harms, namely to inform humanity about all plausible climate change impacts. Thus, there is a basic conflict between IPCC’s mission of synthesizing peer-reviewed climate change science and providing policy-makers with information about all scientifically plausible climate change impacts.

This need of policy-makers to understand all plausible harms creates an enormous challenge for mainstream scientific institutions which usually rely on peer-review in which scientists normally review scientific claims by comparing claims to empirically tested observations which are the ground of the scientific enterprise. Yet, as Hans Jonas explained in The Imperative of Responsibility, In Search of an Ethics in a Technological Age, the power of modern technology to create catastrophic harms such as those harms now foreseeable from human-induced climate change, ethics requires that policy-makers approach these matters with a “heuristics of fear,” replacing the former “projections of hope” that traditionally guided policy (Jonas, 1984, p.x), Yet, mainstream science is often uncomfortable with conclusions not grounded in scientific observations. If this is so, ethics requires that IPCC’s mandate be amended to synthesize scientifically plausible conclusions about climate change outcomes.

B. The Ethical Bankruptcy of Arguments Which Demand High Levels of Certainty Before Taking Action to Reduce the Threat of Climate Change

The WLB report also claims that quoting a 2014 article in the Guardian increasing evidence ‘that policy summaries on climate impacts and mitigation by the IPCC were significantly “diluted under political pressure from some of the world’s biggest greenhouse gas emitters, including Saudi Arabia, China, Brazil, and the United States.” (WLB. p. 34)

The WLB report consistently argues that the remedy to IPCC’s tendency to underestimate climate impacts is to allow or require more speculation about uncertain but plausible climate impacts. However, those governments that seek to restrict discussion of all impacts to those that have been proven with relatively high levels of proof would likely argue that speculation could lead to an overstatement of climate impacts. Yet following a precautionary science that identifies all plausible climate change impacts including those that have been based on speculation can guard against overstating the seriousness of climate impacts by allowing those who claim that the plausible impacts have been overstated to provide reasons for their claims so that policymakers can judge whether some of the plausible but not fully proven impacts are arbitrary or without any plausible scientific support. This would place the burden of proving harm appropriately, as a matter of ethics, on the parties that seek to justify continuing dangerous behavior.

Nations which have demanded high levels of proof before reducing their contributions to climate change have failed to abide by their ethical and legal duties to not harm others and not abide by the ” precautionary principle” which they agreed to UNFCCC and the Paris Agreement.

C. Ethical Problems with Economics Arguments Against Climate Change Policies

The WLB report also claims that some governments have advocated policies that would not be sufficient to achieve the goals of the UNFCCC to prevent dangerous climate change because they thought policies that achieve safer levels of warming ‘were too economically disruptive.” (WLB, p. 39). This report claims that in so doing,” policymakers are complicit today in destroying the very conditions which make life possible.” (WLB, p. 39) Further, the WLB report claims “There is no greater crime against humanity.” (WLB, p. 39)

An ethical analysis of those nations that refuse to adopt policies that may be necessary to prevent catastrophic harm on the basis of their economic interest would also strongly condemn these nations as deeply morally bankrupt.

References:

Anthony et. al., 2018, 21st-Century Modeled Permafrost Carbon Emissions Accelerated by Abrupt Thaw Beneath Lakes, Nature Communications ,https://www.nature.com/articles/s41467-018-05738-9#author-information

Breakthrough Institute, 2018, What Lies Beneath, On the Understatement of Existential Climate Risk, https://docs.wixstatic.com/ugd/148cb0_a0d7c18a1bf64e698a9c8c8f18a42889.pdf

Jonas, H, 1984, The Imperative of Responsibility; In Search of an Ethics for a Technological Age, University of Chicago Press

Steffen et.al., 2018, Trajectories in the Earth System in the Anthropocene, Proceedings of the National Academy of Sciences, http://macroecointern.dk/pdf-reprints/Steffen_PNAS_2018.pdf

 

By:

Donald A. Brown

Scholar in Residence and Professor

Widener University Commonwealth Law School

Harrisburg, Pa.

dabrown57@gmail.com

 

US Media’s Failure to Acknowledge the Most Important Implications of the Pope’s Encyclical

popes

Now that Pope Francis has released his encyclical on climate change, strong responses from many climate change deniers has predictably emerged. Most of these attacks on the Pope’s message have focused on the Pope wandering from his area of authority in theology into science. Former Thatcher adviser Christopher Monckton’s retort is typical: “It is not the business of the Pope to stray from the field of faith and morals and wander in to the playground that is science”

The US media’s coverage, also predictably, has mostly focused on whether the Pope should have stayed in his theology lane.

Yet the most important potential message of the Pope’s encyclical is his assertion that climate change is a moral problem. Now, of course, many see the Pope’s claim about morality unsurprising but fail to understand the profound significance for climate policy-making of understanding climate change fundamentally as a moral issue. If climate  change is understood to be a moral issue, it would completely transform the way climate change policies have been debated in the United States for over three decades.

For instance, opponents of US government action on climate change have for over 30 years predominantly argued against proposed policies on two grounds. First there is too much scientific uncertainty to warrant action and secondly climate policies will destroy jobs, specific industries, and the US economy. For this reason, action on climate change is not in the US self-interest.

But if climate change is a moral issue, the United States may not look at US economic interests alone, it must respond to US duties and obligations to the tens of millions of people around the world who are  most vulnerable to climate change harms. Yet the US debate on climate change has made cost to the US economy of climate change policies, or economic impacts on specific US industries the key criteria for the acceptability of US action on climate change while ignoring what US ghg emissions were doing or threatening to do to tens of vulnerable people around the world.

In addition, if climate change is a moral problem, even assuming counter-factually that there is considerable scientific uncertainty about whether humans are causing serious global warming, those who are putting others at risk have duties to not endanger vulnerable people without their consent. This is particularly true on issues where waiting to resolve scientific uncertainty makes the problem worse or waiting makes the problem harder to solve, clear attributes of climate change.

It is the tens of millions of potential victims of climate change impacts that have the most to lose by waiting until all scientific uncertainties are resolved. Given that the mainstream scientific community now believes that the world is quickly running out of time to prevent dangerous climate change, the moral problems with waiting until all climate scientific uncertainties are resolved are unfortunately becoming obvious. The United States should have acknowledged the duty to fake action on climate change 30 years ago once the US Academy of Sciences and other highly respected scientific institutions stated that human-induced climate change was a growing menace.

Even without the Pope’s encyclical, Climate change is a problem with certain features that scream for attention to see it and respond to it as essentially a moral problem even more than other environmental problems. These features include the following:

• First, it is a problem that is being caused by some high-emitting people and nations in one part of the world who are putting other people and nations at great risk in another part of the world who have often done little to cause the problem.

• Second, the harms to those mostly at risk are not mere inconveniences, but potential catastrophic harms to life and natural resources on which all life depends.

• Third, climate change is a problem for which those people most at risk often can do little to protect themselves by petitioning their governments. Their best hope is that those high-emitting nations and people causing the problem will see that they have ethical duties to the victims to avoid harming them.

• Fourth, because CO2 is well mixed in the atmosphere, all human activities are contributing to rising atmospheric concentrations and therefore a global solution to climate change requires all nations and people to limit their greenhouse gas (GHG) emissions to their fair share of safe global emissions.

Because climate change is a moral problem, issues nations must face in formulating climate policies need to be guided by moral considerations. They include, among many others, principles on what is each nation’s fair share of safe global emissions, who is responsible for reasonable adaptation needs of those people at greatest risk from  climate damages in poor nations that have done little to cause climate change, should high-emitting nations help poor nations obtain climate friendly energy technologies, and what responsibilities should high-emitting nations have for refugees who must flee their country because climate change has made their nations uninhabitable?

Because climate change is a moral problem, high-emitting organizations, sub-national governments, corporations, and individuals also have duties to reduce their greenhouse gas emissions to their fair share of safe global emissions.

In the international climate negotiations that will resume on November 30 in Paris, issues of fairness are already the key issues in dispute. Hopefully the Pope’s encyclical will help citizens around the world see the moral dimensions of climate change policies and respond accordingly.

The US press has for 30 years utterly failed to help US citizens understand the practical significance for climate policy if climate change is a moral issue.  Perhaps the Pope’s encyclical will change this.

Improving IPCC Working Group III’s Analysis on Climate Ethics and Equity, Second In A Series.

ipcc_postcard

jutice climate

 

This is the second in a three part series examining the ethical and justice issues discussed by the IPCC Working Group III in its 5th Assessment Report (AR5) . In the first entry in  this series we concluded that although the recent IPCC AR 5 Working Group III report is laudable improvement over prior IPCC reports in regard to identifying ethical and equity issues that should be considered in developing climate change policy, some criticisms are also warranted of how IPCC has articulated the significance and implications of the ethical, justice, and equity principles that should guide nations in developing climate change policies.

In short, we will argue improvement is possible in how IPCC deals with ethics, justice, and equity issues entailed by climate change policy-making despite very significant improvements on these matters in the AR5 report compared to prior IPCC reports.

In this entry we will examine several preliminary ethical and justice issues raised by the new IPCC Working Group III Chapter 3, on Social, Economic, and Ethical Concepts.  The last entry will continue the examination Chapter 3 and then turn to Chapter 4 on Sustainable Development and Equity.

As a preliminary matter, one of the challenges that IPCC faces in its mandate on of ethics and justice issues relevant to climate change policy-making is that it is not IPCC’s role to be prescriptive in deciding what governments should do. It’s mandate is to synthesize the extant social-economic and scientific literature for policy-makers. In this regard, the IPCC chapter on ethics said expressly:

This chapter does not attempt to answer ethical questions, but rather provides policymakers with the tools (concepts, principles, arguments, and methods) to make decisions. (IPCC, 2014.WG III, Ch. 3, pg. 10)

And so it is not IPCC’s role to do ethical analyses of policy issues that raise ethical questions. IPCC can, however, distinguish between prescriptive and descriptive questions that arise in relevant socio-economic literature about climate policy-making, identify important ethical and justice issues that arise in this literature, where there is a consensus on ethics and justice issues in the relevant literature describe the consensus position, where there is no consensus on ethical and justice issues describe the range of reasonable views on these issues, and identify hard and soft law legal principles relevant to how governments should resolve ethical and justice issues that must be faced by policy-makers.

There are several subjects in climate change policy-making which raise important ethical and justice issues. They include policy judgements about:

  1. how much warming will be tolerated, a matter which is implicit but rarely identified when nations make ghg emissions reduction commitments,
  2. any nation’s fair share of safe global emissions, matters which are referred to by the IPCC usually as burden-sharing or effort-sharing considerations and a matter taken up in chapter 4 of IPCC, Working Group III chapter on sustainability and equity,
  3. any nation’s responsibility for funding reasonable adaptation and compensation for losses and damages for those who are harmed by climate change,
  4. when a nation is responsible for its ghg emissions given differences in historical and per capita emissions among nations,
  5. responsibility for funding technology transfer to poor nations,
  6. how to evaluate the effects on and responsibilities to others of climate change technologies that are adopted in response to the threat of climate change, including such technologies as geo-engineering or nuclear power, for instance,
  7. who has a right to participate in climate change policy-making, a topic usually referred to under the topic of procedural justice,
  8. the policy implications of human rights violations caused by climate change,
  9. the responsibility of not only nations but subnational governments, entities, organizations, and individuals for climate change,
  10. when economic analyses of climate change policy options can prescribe or limit national duties or obligations to respond to the threat of climate change,
  11. ethical and justice implications of decisions must be made in the face of scientific uncertainty,
  12. whether action or non-action of other nations is relevant to any nation’s responsibility for climate change,
  13. how to spend limited funds on climate change adaptation,
  14. when politicians may rely on their own uninformed opinion about climate change science,
  15. who is responsible for climate refugees and what their responsibilities are.

nw book advOn some of these issues, the recent IPCC report included a good summary of the extant ethical literature, on other issues important gaps in IPCC’s analysis can be identified, and lastly on a few of these issues, IPCC Working Group III is silent. IPCC reports cannot be expected to be exhaustive on these matters and therefore gaps and omissions in the IPCC reports in regard to ethics and justice issues relevant to policy-making is not necessarily a criticism of IPCC and is here pointed out only for future consideration. In fact, IPCC’s work on the ethical limits of economic arguments is a particularly important contribution to the global climate change debate. What is worthy of criticism, however, is if IPCC’s conclusions on guidance for policy-makers is misleading on ethics and justice issues.

II. Ethical Issues Raised by Economic Arguments About Climate Policy

Perhaps the most important practical ethical and justice issues raised by Working Group III’s work on ethics is its conclusions on the ethical and justice limitations of economic analyses of climate change policy options. This topic is enormously practically important because nations and others who argue against proposed climate change policies usually rely on various economic arguments which often completely ignore the ethical and justice limitations of these arguments (In the case of the United States, see Brown, 2012.) Because most citizens and policy-makers have not been trained in spotting ethically dubious claims that are often hidden in what appear at first glance to be “value-neutral” economic arguments, IPCC’s acknowledgement of the ethical limitations of economic arguments is vitally important.  It is also practically important because the first four IPCC reports, although not completely ignoring all ethical and justice problems with economic arguments about climate change policies, failed to examine the vast majority of ethical problems with economic arguments against climate change policies while making economic analyses of climate change policies the primary focus of Working Group III’s work thereby  leaving the strong impression that economic analyses, including but not limited to cost-benefit analyses, is the preferred way to evaluate the sufficiency of proposed climate change policies.  On this matter, the AR5 report has made important clarifications.

The AR5 III report included a section on this very issue entitled: Economics, Rights, and Duties which we reproduce here it  its entirety because of its importance to this discussion,  followed by comments in bold italics:

Economics can measure and aggregate human wellbeing, but Sections 3.2, 3.3 and 3.4 explain that wellbeing may be only one of several criteria for choosing among alternative mitigation policies.

Other ethical considerations are not reflected in economic valuations, and those considerations may be extremely important for particular decisions that have to be made. For example, some have contended that countries that have emitted a great deal of GHG in the past owe restitution to countries that have been harmed by their emissions. If so, this is an important consideration in determining how much finance rich countries should provide to poorer countries to help with their mitigation efforts. It suggests that economics alone cannot be used to determine who should bear the burden of mitigation.

What ethical considerations can economics cover satisfactorily? Since the methods of economics are concerned with value, they do not take into account of justice and rights in general. However, distributive justice can be accommodated within economics, because it can be understood as a value: specifically the value of equality. The theory of fairness within economics (Fleurbaey, 2008) is an account of distributive justice. It assumes that the level of distributive justice within a society is a function of the wellbeings of individuals, which means it can be reflected in the aggregation of wellbeing. In particular, it may be measured by the degree of inequality in wellbeing, using one of the standard measures of inequality such as the Gini coefficient (Gini, 1912), as discussed in the previous section. The Atkinson measure of inequality (Atkinson, 1970) is based on an additively separable social welfare function (SWF), and is therefore particularly appropriate for representing the prioritarian theory described in Section 3.4.6 . Furthermore, distributive justice can be reflected in weights incorporated into economic evaluations as Section 3.6 explains.

Simply identifying the level of inequality using the Gini Index does not assure that the harms and benefits of climate change policies will be distributed justly. For that a theory of just distribution is needed. The Gini index is also at such a level of abstraction that it is very difficult to use it as a way of thinking about the justice obligations to those most vulnerable to climate change. Even if there is strong economic equality in a nation measured by the Gini index, one cannot conclude that climate change policies are distributively just.

Economics is not well suited to taking into account many other aspects of justice, including compensatory justice. For example, a CBA might not show the drowning of a Pacific island as a big loss, since the island has few inhabitants and relatively little economic activity. It might conclude that more good would be done in total by allowing the island to drown: the cost of the radical action that would be required to save the island by mitigating climate change globally would be much greater than the benefit of saving the island. This might be the correct conclusion in terms of overall aggregation of costs and benefits. But the island’s inhabitants might have a right not to have their homes and livelihoods destroyed as a result of the GHG emissions of richer nations far away. If that is so, their right may override the conclusions of CBA. It may give those nations who emit GHG a duty to protect the people who suffer from it, or at least to make restitution to them for any harms they suffer.

Even in areas where the methods of economics can be applied in principle, they cannot be accepted without question (Jamieson, 1992; Sagoff, 2008). Particular simplifying assumptions are always required, as shown throughout this chapter. These assumptions are not always accurate or appropriate, and decision‐makers need to keep in mind the resulting limitations of the economic analyses. For example, climate change will shorten many people’s lives. This harm may in principle be included within a CBA, but it remains highly contentious how that should be done. Another problem is that, because economics can provide concrete, quantitative estimates of some but not all values, less quantifiable considerations may receive less attention than they deserve.

This discussion does not adequately capture serious ethical problems with translating all values into monetary units measured by willingness to pay or its surrogates nor that such transformation may greatly distort ethical obligations to do no harm into changes in commodity value.

The extraordinary scope and scale of climate change raises particular difficulties for economic methods (Stern, forthcoming). First, many of the common methods of valuation in economics are best designed for marginal changes, whereas some of the impacts of climate change and efforts at mitigation are not marginal (Howarth and Norgaard, 1992). Second, the very long time scale of climate change makes the discount rate crucial at the same time as it makes it highly controversial (see Section 3.6.2 ). Third, the scope of the problem means it encompasses the world’s extremes of wealth and poverty, so questions of distribution become especially important and especially difficult. Fourth, measuring non‐market values—such as the existence of species, natural environments, or traditional ways of life of local societies—is fraught with difficulty. Fifth, the uncertainty that surrounds climate change is very great. It includes the likelihood of irreversible changes to societies and to nature, and even a small chance of catastrophe. This degree of uncertainty sets special problems for economics. (Nelson, 2013) (IPCC, 2014.WG III, Ch. 3, pg. 12-13)

Again this discussion does not adequately describe the ethical problems with economic determinations of all values. In fact it leaves the impression that if non-market values can be discovered the problems of transforming all values to commodity values are adequately dealt with.

Chapter 3, also includes additional statements about the ethical limits of economic reasoning sprinkled throughout the chapter. They include:

1. Most normative analyses of solutions to the climate problem implicitly involve contestable ethical assumptions.(IPCC, 2014. WG III, Ch. 3, pg.10)

2. However, the methods of economics are limited in what they can do. They can be based on ethical principles, as Section 3.6 explains. But they cannot take account of every ethical principle. They are suited to measuring and aggregating the wellbeing of humans, but not to taking account of justice and rights (with the exception of distributive justice − see below), or other values apart from human wellbeing. (IPCC, 2014.WG III, Ch. 3, pg. 24)

And so Chapter 3 of the IPCC report contains a number or clear assertions  about the ethical limitations of economic arguments. However there are important gaps missing from this analysis. Also several sections of Chapter 3 that can be interpreted as claims that policy makers are free to choose economic reasoning as justification for climate policies. That is, some of the text reads as if a policy-maker is free to choose whether to base policy  on economic or ethical and justice considerations, choosing between these two ways of evaluation is simply an option. Some of these provisions follow with responses in italics

Chapter 3 page 6 says:

Many different analytic methods are available for evaluating policies. Methods may be quantitative (for example, cost‐benefit analysis, integrated assessment modeling, and multi‐criteria analysis) or qualitative (for example, sociological and participatory approaches). However, no single best method can provide a comprehensive analysis of policies. A mix of methods is often needed to understand the broad effects, attributes, trade‐offs, and complexities of policy choices; moreover, policies often address multiple objectives  (IPCC, 2014.WG III, Ch. 3, pg. 6)

Although economic analyses can provide policy-makers with valuable information such as which technologies will achieve ethically determined goals at lowest cost, thereby providing criteria for making remedies cost-effective, there are serious ethical problems with cost-benefit analyses used prescriptively to set emissions reductions targets. Some of these are alluded to in IPCC Chapters 3 and 4, others are not acknowledged. Because of the prevalence of cost-benefit justifications for climate change policies, future IPCC reports could make a contribution by identifying all of the ethical issues raised by cost-benefit analyses.

 Any decision about climate change is likely to promote some values and damage others. These may  be values of very different sorts. In decision making, different values must therefore be put together or balanced against each other. (IPCC, 2014. WG III, Ch. 3, pg. 6)

This provision can be understood as condoning a consequentialist approach to climate policy that fails to acknowledge deontological limits. Since when any nation makes policy on climate change it affects poor people and vulnerable nations around the world, there are serious procedural justice issues which go unacknowledged in this section and,  for the most part, all throughout Chapter 3. Nowhere does the chapter acknowledge that when a climate policy is  under development at the national level,  nations have no right to compare costs to them of implementing policies  with the harms to others that have not consented to the method of valuation being used to determine quantitative value.

Ideally, emissions should be reduced in each place to just the extent that makes the marginal cost of further reductions the same everywhere. One way of achieving this result is to have a carbon price that is uniform across the world; or it might be approximated by a mix of policy instruments (see Section 3.8 ). (IPCC, 2014.WG III, Ch. 3, pg. 26)

This statement fails to acknowledge that emissions reductions amounts should be different in different places according to well accepted principles of distributive justice. Although other sections of the chapter acknowledge that responsibility for climate change is a matter of distributive justice, this section and others leave the impression that climate policy can be based upon economic efficiency grounds alone. The way to cure this problem is to continue to reference other sections that recognize ethical limits in setting policy on the basis of efficiency.

(IPCC, 2014.WG III, Ch. 3, pg. 6)

Since, for efficiency, mitigation should take place where it is cheapest, emissions of GHG should be reduced in many developing countries, as well as in rich ones. However, it does not follow that mitigation must be paid for by those developing countries; rich countries may pay for mitigation that takes place in poor countries. Financial flows between countries make it possible to separate the question of where mitigation should take place from the question of who should pay for it. Because mitigating climate change demands very large‐scale action, if put in place these transfers might become a significant factor in the international distribution of wealth. Provided appropriate financial transfers are made, the question of where mitigation should take place is largely a matter for the  economic theory of efficiency, tempered by ethical considerations. But the distribution of wealth is amatter of justice among countries, and a major issue in the politics of climate change (Stanton, 2011). It is partly a matter of distributive justice, which economics can take into account, but compensatory justice may also be involved, which is an issue for ethics. (Section 3.3).(IPCC, 2014.WG III, Ch. 3, pg. 26)

There are a host of  potential ethical problems with mitigation taking place in one part of the world to satisfy the ethical obligations of a nation in another part of the world which is emitting above its fair share of safe global emissions that are not mentioned in this article. Included in these problems are:

  • Environmental Sufficiency. There are many technical challenges in assuring that a project in one part of the world that seeks to reduce ghg by an amount that otherwise would be required of a polluter will actually succeed in achieving the reductions particularly when the method of reduction is reliant on biological removal of carbon.
  • Permanence. Many proposed projects for reducing carbon in one part of the world to offset reductions ethically required in another part of the world raise serious questions about whether the carbon reduced by the project will stay out of the atmosphere forever, a requirement that is required to achieve the environmental equivalence to ghg emissions reductions that would be achieved at the source.
  • Leakage. Many proposed projects used to offset emissions reductions of high-emitters raise serious questions about whether carbon reduced by a project at one location will result in actual reductions in emissions because the activity which is the subject of the offset is resumed at another location.
  • Additionality. A project that is proposed in another part of the world to offset emissions reductions of a high-emitting entity may not be environmentally effective if the project would have happened anyway for other reasons.
  • Allowing Delay In Investing In New Technology. The ability to rely on a cheaper emissions reductions project in another part of the world as a substitute of reducing emissions creates an excuse for high-emitting entities to delay investment in technologies that will reduce the pollution load. This may create a practical problem when emissions reductions obligations are tightened in the future. 

Chapter 3 also treats other important ethical issues that arise in climate change policy formation. They include:

3.3 Justice, equity and responsibility,

3.3.1 Causal and moral responsibility

3.3.2 Intergenerational justice and rights of future people

3.3.3 Intergenerational justice: distributive justice

3.3.4 Historical responsibility and distributive justice

3.3.5 Intra‐generational justice: compensatory justice and historical responsibility

3.3.6 Legal concepts of historical responsibility

3.3.7 Geoengineering, ethics, and justice

3.4 Values and wellbeing

3.4.1 Non‐human values

3.4.2 Cultural and social values

3.4.3 Wellbeing

3.4.4 Aggregation of wellbeing

3.4.5 Lifetime wellbeing

3.4.6 Social welfare functions

3.4.7 Valuing population

III. Some Additional Gaps In Chapter 3

Some of the gaps in Chapter 3 on ethical issues raised by climate change policy-making include: (1) ethics of decision-making in the face of scientific uncertainty, (2) whether action or non-action of other nations affects a nation’s responsibility for climate change, (3) how to spend limited funds on climate change adaptation, (4) when politicians may rely on their own uninformed opinion about climate change science, and (5) who is responsible to for climate refugees and what are their responsibilities.

The last entry in this series will continue the analyses of IPCC  Chapter 3 on Social, Economic, and Ethical Concepts and Chapter 4 on Sustainability and Equity.

References

Brown, 2012,  Navigating the Perfect Moral Storm: Climate Change Ethics In Light of a Thirty-Five Year Debate, Routledge-Earthscan, 2012

Intergovernmental Panel on Climate Change (IPCC), 2014, Working Group III, Mitigation of Climate Change, http://www.ipcc.ch/report/ar5/wg3/

By:

Donald A. Brown

Scholar In Reference and Professor

Sustainability Ethics and Law

Widener University School of  Law

dabrown57@gmail.com

 

 

A New Web Site Enables Climate Policy Makers To Fulfill Their Ethical Responsibility to Understand The Significance of Policy Choices

aubreyAs we have explained from many angles on this website, climate change is a civilization challenging ethical problem. We have also explained why nations urgently need to immediately respond to their ethical obligations in making national emissions commitments under the UNFCCC.  In addition, ethics requires those engaged in dangerous behavior to understand the effects of their policy choices and respond to their ethical obligations. Yet complex interactions of ghg emissions levels, atmospheric ghg concentrations, the climate system’s response to atmospheric ghg concentrations, and how policy options must consider the magnitude of the global threat as it changes in time make it difficult for policy makers and NGOs to visualize and understand the significance of climate policy choices. And so ethics requires policy makers to understand these complex interactions, yet the sheer complexity of these interactions makes clear understanding of the significance of policy options very challenging.

We have also explained on this website how the debate on climate change in the United States and several other high-emitting nations is largely ignoring national ethical responsibilities. If nations are to take their ethical obligations seriously, they need to understand the extreme urgency of increasing their ghg emissions reduction targets to comply with their ethical obligations. Yet to understand their ethical obligations policy-makers must understand  the significance of policy choices. And so ethics requires climate change policy-makers to understand many complex scientific issues.

Ethics would also hold nations morally responsible for the failure to do this. Delay makes the climate change problem worse. Yet understanding how delay makes achieving the goals of preventing dangerous climate change extraordinarily more challenging also requires some knowledge about how increasing atmospheric concentrations affect global emissions reductions pathways options.   In addition, because each national emission reduction target commitment must be understood as an implicit position of the nation  on safe ghg atmospheric concentration levels, setting national ghg emissions goals must be set with full knowledge of how any national target will affect the global problem.

However, a clear understanding of how national emissions reductions commitments affect global climate change impacts requires an understanding of complex relationships between atmospheric ghg concentrations, likely global temperature changes in response to ghg atmospheric concentrations, rates of ghg emissions reductions over time and all of this requires making assumptions about how much CO2 from emissions will remain in the atmosphere, how sensitive the global climate change is to atmospheric ghg concentrations, and when the international community begins to get on a serious emissions reduction pathway guided by equity considerations. The problem in understanding these variables  is a challenge  that no static graph can capture.

A new website should be of great value to policy-makers to view  and understand the relationship between their national emissions reduction strategies and the global climate change problem, issues that must be considered in setting national ghg targets as a matter of ethics.  This tool is the Carbon Budget Accounting Tool (CBAT) which is available at http://www.gci.org.uk/cbat-domains/Domains.swf

Some features of CBAT are still under development, yet the site is already practically useful to policy-makers.

The CBAT has been developed by the Global Commons Institute founded in the United Kingdom in 1990 by Aubrey Meyer as an organization to find to a fair way to tackle climate change.

ContractionAndConvergence

 

The CBAT tool allows visualization of  any  national response for reducing national ghg emissions commitments based upon the idea of contraction and convergence, one of several equity frameworks under discussion in international climate negotiations,  but is also of value for visualizing the policy significance of other equity frameworks that are under discussion internationally.

CBAT allows those interested in developing a global solution to visualize the otherwise complex interactions of international carbon budgets, atmospheric greenhouse gas concentrations, ghg emissions reductions commitments, the effect of a nation taking its ethical obligations seriously, resulting temperature, ocean acidification, and seal level rise,

The CBAT model should be very useful for all who hope to understand future climate change policy options and the scale of the global challenge facing the world. This writer has been engaged in climate change policy options since the 1992 Earth Summit at which the United Nations Framework Convention was opened for signature and have attended most of the Conference of Parties under the UNFCCC since then. Yet even though I have significant experience and knowledge about future climate change policy challenges, the CBAT model helps me visualize the significance of certain policy options facing the world.

Because ethics requires policy-makers to understand the policy implications of their policies, understanding the complex interactions of the variables displayed on the CBAT is indispensable for national climate change policy-makers as a matter of ethics.

By:

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Donald A. Brown

Scholar In Residence and Professor

Widener University School of Law

Visiting Professor, Nagoya University School of Law

Nagoya Japan

dabrown57@gmail.com

A video: Why Politicians May Not Rely On Their Own Uninformed Opinion On Climate Change Science.

https://i0.wp.com/ethicsandclimate.org/wp-content/uploads/2013/02/slide4.jpg?resize=268%2C200This 11 minute video examines why politicians, unlike many ordinary citizens,  may not rely upon their own uninformed opinion on climate change science as a basis for refusing to support climate change policies. The video argues that politicians have responsibilities that ordinary citizens do not have to protect others from harms that their constituents are causing others.

 

This video follows the last entry on this subject:

Why Politicians May Not Ethically Rely on Their Own Uninformed Opinion About Climate Science and 10 Questions That The Press Should Ask Politicians About Climate Science In Light of This Responsibility.

By:

Donald A. Brown

Scholar In Residence, Sustainability Ethics and Law

Widener University School of Law

dabrown57@gmail.com

 

Why Politicians May Not Ethically Rely on Their Own Uninformed Opinion About Climate Science and 10 Questions That The Press Should Ask Politicians About Climate Science In Light of This Responsibility.

Marco Rubio, a US Senator from Florida, recently said that he was not sure the climate change was human caused. This is one of the reasons why he’s unwilling to support US government action to reduce the threat of climate change.  Many other US politicians have also recently said they will not support legislation to reduce US greenhouse gas emissions because they are not convinced that climate change happening or is human-caused. In fact, 7 out of 8 Republican candidates for the US presidency proclaimed they didn’t believe that climate change was a problem. (Skeptical Science) When these politicians are asked about the basis for their positions on climate change, they almost always respond by saying such things as they “have heard that there is a disagreement among scientists” or similar responses that strongly suggest they have informed an opinion on climate change science without any understanding of the depth of the scientific evidence on which the scientific consensus view 0f climate change has been based. For instance, US politicians frequently assert that it is an open question whether humans are causing the undeniable warming that the Earth is experiencing, thus exposing ignorance of dozens of lines of independent robust evidence of human causation including attribution studies, finger print analyses,  strong evidence that correlates fossil fuel use to rising atmospheric concentrations of greenhouse gases, and other physical and chemical evidence.

Although ordinary individuals may have no duty to go beyond their own personal opinion about the science of climate change, government officials who have the power to enact policies that could present catastrophic harm to millions of people around the world may not as a matter of ethics justify their refusal to support policies to reduce the threat of climate change on the basis of their uninformed opinions on climate science. This is so because government officials, unlike ordinary citizens, have the power to prevent or minimize great harms to millions of people around the world that mainstream scientists have concluded that their constituents or governments that they represent are causing or contributing to. That is, a government officials have more responsibility than the average citizen to understand the state of climate change science because the government official can uniquely prevent harm that their constituents or governments are causing. And so, when government officials with the power to enact climate change policies are on notice that respectable scientific evidence supports the conclusion that their constituents or governments are likely causing great harm, they may not appeal to their uninformed opinion on climate science as justification for not taking action.


The government official is like the railroad official who has been told by employees who are in a position to know the location of the company’s trains that there is a runaway train hurtling toward a bus full of children that is stuck on the track, when the official has the ability to divert the train onto a track on which no humans will be harmed.

In the case of climate change, government officials should know that 97 of every 100 scientists that actually do peer-reviewed climate science research and in the  United States by the most prestigious scientific organizations including the US National Academy of Sciences that greenhouse gases coming from his constituents threaten catastrophic harm not only to his constituents but to millions of people around the world, most of whom have done little to cause climate change.

In the case of climate change, the US politician not only has the power, working with colleagues, to prevent great harm caused by his or her constituents, he or she has the responsibility to prevent his or her constituents from harming others outside United States. This responsibility was expressly agreed to by the United States when it ratified the United Nations Convention on Climate Change which contains the following acknowledgment of the US governments responsibility to prevent harm to those outside the United States in the convention’s Preamble:

Recalling also that States have, in accordance with the Charter of the United Nations and the principles of international law, the sovereign right to exploit their own resources pursuant to their own environmental and developmental policies, and the responsibility to ensure that activities within their jurisdiction or control do not cause damage to the environment of other States or of areas beyond the limits of national jurisdiction. (UNFCCC Preamble)

In the case of climate change, the people that will be harmed (those in our metaphorical bus) are not only the constituents of the politician but hundreds of millions of people around the world that have done little or nothing to cause climate change.

 

The vast majority of climate scientists and over 100 scientific organizations whose members have climate science expertise have concluded that humans are causing climate change and human-induced climate change creates catastrophic threats for the human race and particularly for hundreds of millions of poor people around the world who are most vulnerable to climate change impacts.  Although there are some differences among some mainstream scientists about some of the details of the consensus view, an open letter from the American Association for the Advancement of Science’s which was endorsed by 18 of the most prestigious scientific organizations in the United States summed up the nature of the scientific consensus as follows:

As you consider climate change legislation, we, as leaders of scientific organizations, write to state the consensus scientific view. Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver. These conclusions are based on multiple independent lines of evidence, and contrary assertions are inconsistent with an objective assessment of the vast body of peer- reviewed science. (AAAS 2009)

Though scientific consensus must always be open to responsible skepticism given: (a) the strength of the consensus on this topic, (b) the enormity of the harms predicted by the consensus view, (c) an approximately 30 year delay in taking action that has transpired since a serious climate change debate began in the United States in the early 1980s, (d)  a delay that has made the problem worse while making it more difficult to achieve ghg emissions reductions necessary to prevent dangerous climate change because of the steepness of reductions now needed, no politician can ethically justify his or her refusal to support action on climate change based upon a personal opinion that is not supported by strong scientific evidence that has been reviewed by scientific organizations with a wide breadth of interdisciplinary scientific expertise.  Because any further delay will make the climate change threat worse, US politicians have a duty to support policies that will reduce the threat of climate unless they can produce strong scientific evidence that has been fully vetted by respectable scientific institutions that climate change is not the threat entailed by the scientific consensus view.

In this situation the government official has a strong duty to go beyond his or her own uninformed opinion about whether humans are causing dangerous climate change. They must justify their refusal to act on strong, peer-reviewed scientific evidence that is accepted by mainstream scientific institutions that have the breadth of expertise to consider one study in the context of thousands of other studies in climate change science. And so, government officials may not justify their refusal to act simply on the basis of  their personal opinion.

Because politicians have an affirmative duty to initially rely upon mainstream scientific views in regard to human activities that could cause great harm, the press has a journalistic duty to help citizens understand any politician’s views that oppose action on climate change policies on scientific grounds. The US press has almost always failed to probe the justifications of those opposing action on climate change on scientific grounds. For this reason, journalists should ask politicians that claim there is not sufficient scientific support for government action climate change the following questions:

1. What specific scientific references and sources do you rely upon to conclude that there is a reasonable scientific dispute about whether human actions are causing dangerous climate change?

2. Are you aware that the United States Academy of Sciences and almost all respected scientific organizations whose membership includes scientists  with expertise relevant to climate change science support the scientific consensus view that holds has that the planet is warming, that the warming is mostly human caused, and that harsh impacts from warming are very likely under business-as-usual?

3.  On what basis do you disregard the conclusions that humans are causing dangerous climate change held by the United States Academy of Sciences, over a hundred scientific organizations whose membership includes experts with expertise relevant to the science of climate change, and 97 percent of scientists who actually do peer-reviewed research on climate change?

4. When you claim that the United States need not adopt climate change policies because adverse climate change impacts have not yet been proven, are you claiming that climate change skeptics have proven that human-induced climate change will not create adverse impacts on human health and the ecological systems of others on which their life often depends and if so what is that proof?

5. When you claim that the United States should not adopt climate change policies because there is scientific uncertainty about adverse climate change impacts, are you arguing that no action of climate change should be taken until all scientific uncertainties are resolved given that waiting to resolve all scientific uncertainties before action is taken will very likely make it too late to prevent dangerous human-induced climate change harms according to the consensus view?

6. Do you deny that those who argue that they should be allowed to continue to emit greenhouse gases at levels that may be dangerous should assume the burden of proof that their actions are safe given the strength of the consensus view on climate change science?

7. Do you deny that those who are most vulnerable to climate change’s harshest potential impacts have a right to participate in a decision about whether to act to reduce the threat of climate change in the face of scientific uncertainty?

8. Given that in ratifying the United Nations Framework Convention on Climate Change (UNFCCC) the Untied States in 1992 agreed to the following under Article 3, do you believe the United States is now free to ignore this promise by refusing to take action on climate change on the basis of scientific uncertainty?

The Parties should take precautionary measures to anticipate, prevent or minimize the causes of climate change and mitigate its adverse effects. Where there are threats of serious or irreversible damage, lack of full scientific certainty should not be used as a reason for postponing such measures, taking into account that policies and measures to deal with climate change should be cost-effective so as to ensure global benefits at the lowest possible cost.

(UNFCCC, Art 3)

 9. If you claim that the climate change impacts predicted by the Intergovernmental Panel on Climate Change (IPCC) have not reached a level of scientific certainty that warrants action, do you agree that climate change impacts predicted by IPCC could be wrong in both directions, potentially leading to even harsher adverse impacts than those predicted?

10. Given that for over 20 years since international climate change negotiations began, the United States has refused to commit to reduce its greenhouse gas emissions based upon the justification that there is too much scientific uncertainty to warrant action, if it turns out that human-induced climate change actually greatly harms the health and ecological systems on which life depends of others, should the United States be responsible for the harms that could have been avoided if preventative action had been taken earlier?

By:

dabrown57@gmail.com

Donald A. Brown

Scholar In Residence,

Sustainability Ethics and Law

Widener University School of Law