Even if human society immediately managed a complete stop to the emission of carbon, we will fail to achieve the target of the Paris Accord of 2016, of keeping the increase in planetary temperatures to under 2% above pre-industrial levels. And of course, carbon emissions, far from coming to an end are increasing. There is no doubt that dramatic climate change is underway and it is not slowing down.
We are in very big trouble as a species unless we invent miracle solution to global warming. And as the crisis crows, so does momentum behind a project that has striking parallels with the Manhattan Project, the 1941 assembly of scientists at Los Alamos that eventually led to nuclear strikes on Hiroshima and Nagasaki and the danger (that remains with us) of nuclear winter for the planet.
The project I’m referring to is that of Geo-engineering the planet’s atmosphere and in particular, the plan to apply the stratospheric aerosol injection (SAI) of chemical compounds. The idea is to pump sulphates (dust) into to the upper atmosphere so that solar radiation is back-scattered into space.
Behind the push for a Geo-engineered solution to global warming are backers such as the Bill Gates Foundation and the idea is gathering momentum. You can see the growing number of geo-engineering projects via map.geoengineeringmonitor.org, which shows that there were more than eight hundred projects in 2017 (compared to three hundred in 2012).
SAI is an idea that will work. We know it does because when, in the past, such as in 1815, massive volcanic eruptions blasted dust into the stratosphere, the next year or two saw global temperatures drop by as much as five per cent. SAI scientists are attempting to recreate the effect of these volcanoes artificially.
Source: https://commons.wikimedia.org/wiki/File:SPICE_SRM_overview.jpg
One of the parallels between the Geo-engineering drive and the Manhattan Project, is that several of the scientists involved in this research have claimed that the technology will never be used. They are developing the technology… ‘just in case’. But as the climate crisis unfolds, panic measures will be implemented and any new technology that we have available to address global warming will be considered in earnest, no matter now risky.
And there are massive risks with this apparent solution to global warming.
One important point to make about SAI is that it would not change the density of carbon in the atmosphere and therefore it would have no impact on effects such as the acidification of the seas. Secondly, SAI could allow companies and countries to avoid a fundamental solution to the burning of fossil fuels. In fact, petrochemical companies have expressed an interest in supplying the sulphates needed for the project, which would be paid-for by taxpayers. If implemented, SAI represents a huge win for them.
The most common objection to SAI geo-engineering is a strong one: how do we know what the consequence will be? Predictions of what will happen depend on computer models for the atmosphere and at the current time, these models are nowhere near accurate enough to be confident about the impact of SAI. Given that important global phenomena like the North Atlantic Oscillation and the El Niño-Southern Oscillation have yet to be successfully modeled, we just cannot predict what will happen on a global scale, let alone a regional scale. It is very likely that filling the stratosphere with sulphates will not only cool the planet but it will create major turbulence and extreme weather events. Particularly important here is the effect on rainfall: it is quite possible an overall cooling of the planet through SAI is accompanied by devastating floods and droughts at a regional level.
My own concern about SAI arises from my research into the societal consequences of major volcanic eruptions. Let’s suppose humanity starts on the SAI approach, we are then caught in a very dangerous situation, where every year we will have to keep up the practice filling the stratosphere with particles. And as soon as we stop, the underlying crisis of high planetary temperatures will reassert themselves. But what would happen if during this process a major volcano erupted? The dumping of tonnes of dust into the stratosphere on top of the human effort will have devastating consequences. There will be a year or two without summers, crop failure on a massive scale and enormous economic dislocation as planes are grounded for months.
I’m looking at the medieval world in particular, where life was far more precarious than our own. But we cannot be complacent about the potential for resilience today. Modern society in some ways is more vulnerable than that of our medieval predecessors. Just-in-time production and the inter-dependency of the world economy means that if international trade is grounded for several months, the consequences would be shocking.
After the 2010 Icelandic eruption of Eyjafjallajökull, air traffic was affected in some regions for up to a month. This was a volcanic eruption of about one tenth the size of those I’ve been researching in the historical record.
My point is that as the geo-engineering option becomes more appealing in the face of increasingly damaging consequences arising from global warming we will lose track of the bigger historical picture in the hope of a short-term fix. But what this wider perspective demonstrates is that sooner or later a major eruption will happen that brings its own challenges. And if we have already saturated the atmosphere artificially with sulphates when it does, we are going to bring about a year or two of unforeseen, incredibly cold years of massive economic dislocation and crop failure.
There is no governing body that can stop a figure like Donald Trump from beginning this process. Geo-engineering on sufficient scale to cool the planet would cost about a billion dollars. That’s relatively cheap to implement. And this brings imperial considerations into play. There is nothing to stop a rich country, which also is relatively protected from unpredictable consequences from going ahead on their own. Nothing, that is, except the opposition of their own population. That’s why awareness of the dangers of geo-engineering needs to grow, especially among those protesting on 20 September.
This post was originally written for We Only Want the Earth, a Facebook page curated by Dave Lordan to build support for the global climate strike 20 September 2019.
You can download an academic chapter that deals with the topic in greater depth by clicking here.
And below is an interview between myself and Pat Kenny of Newstalk about the dangers of GeoEngineering:
