From the chair of the Planetary Restoration Action Group, PRAG
Hi PRAG people: the pragmatists!
Pragmatism
We are pragmatists because we are guided by practical considerations after evaluating strategies and techniques in terms of their practical application [1]. We challenge the consensus, tainted by dogma, politics and wishful thinking. We study Earth System behaviour to establish the likely direction of travel, and we study how that direction can be reversed in order to re-establish norms of the past.
The goals
The immediate goal is to avert catastrophic climate change and sea level rise. The ultimate goal is to restore the planet to a safe, sustainable, biodiverse and productive state. Our mission is to persuade the "powers that be" to attempt to achieve these goals by employing the necessary strategy and deploying the necessary techniques as a matter of extreme urgency. The climate crisis is a global emergency.
I was prompted to write about progress towards achieving these goals because of Paul Gambill from the CO2 removal (CDR) community who had come to realise that emissions reduction and CDR together were not enough to solve the climate crisis; see his email headed "What Carbon Removal Taught Me About Cooling" (Sept 1). This was a Damascene conversion for him. Direct cooling was going to be necessary for emissions reduction and CDR to succeed.
The absolute necessity for cooling intervention
The necessity is more fundamental. Global warming is accelerating and weather extremes are intensifying. Direct cooling is necessary to slow global warming and avoid tipping point catastrophe. Furthermore, the Earth's Energy Imbalance (EEI), measured by the CERES satellite system, shows an imbalance which can only be rectified by direct cooling. This has been recognised by HPAC and NOAC as well as by PRAG [2].
PRAG advances
But in PRAG we have gone two steps further. Firstly we have identified the most urgent requirement as the halting of Arctic meltdown, which involves lowering the Arctic temperature - it is currently rising about four times faster than the global average. We call this "refreezing the Arctic". Secondly, we have recently come to realise that bringing down the Arctic temperature requires so much cooling power that only stratospheric aerosol injection (SAI) can do the job. This is the reality which has to be faced.
SAI opportunities
As a society we are suddenly presented with threats of unprecedented magnitude in the history of our civilisation. SAI opens up a truly miraculous opportunity both to overcome these threats and to improve the prospects for future generations:
- When modern civilisation desperately needs a powerful intervention to save itself, the Earth System has demonstrated how massive cooling can be achieved using SO2 aerosol injected into the stratosphere by large volcanoes.
- Research has shown that SAI can be deployed with minimal adverse effects both to refreeze the Arctic and to achieve more general cooling.
- The reduction in temperatures in the Arctic and elsewhere can reverse climate change and slow the rate of sea level rise.
- The planet can be returned to the conditions of the late Holocene, which were left in the 1980s with the activation of a number of tipping elements.
- The ultimate goal of planetary restoration is now shown to be achievable at reasonable cost and remarkable safety.
Stages in our response to the crisis
Society's response to the climate crisis has been stuck for ages at the emissions reduction alone (ERA) stage, with backing from the climate establishment and enthusiastic support from climate activists. Recently we have been moving into a stage which includes CDR so that the level of CO2 in the atmosphere does not rise so fast and can eventually be reduced. This will slow warming but not reverse it. We now need to move quickly, with acknowledgement of the direct cooling requirements, onto the SAI preparation and deployment stage. There is no time to lose.
Cheers, John
[1] Meaning of pragmatist:
1.
a person who is guided more by practical considerations than by ideals. "hardheaded pragmatists firmly rooted in the real world"
2.
Philosophy
an advocate of the approach that evaluates theories or beliefs in terms of the success of their practical application. "American pragmatists have influenced a great deal of recent philosophy of many types"
[2] HPAC stands for Healthy Planet Action Coalition, NOAC for Natural Ocean and Atmospheric Cooling, PRAG for Planetary Restoration Action Group.