Solar Geoengineering: Risks and Consequences
A coalition of more than 500 academics from over 60 countries has signed an open letter supporting the initiative of solar radiation modification (SRM). However, there is growing concern among experts about the potential risks associated with deploying this technology as a climate policy option.
Radiation Concerns
Frank Biermann, a professor of global sustainability governance at Utrecht University, expressed his deep concern about the recent developments in solar radiation modification. He highlighted the unknown risks of SRM deployment, the lack of global governance mechanisms to handle such planetary-scale intervention technologies, and the potential delay or derailment of efforts to mitigate climate risks by reducing greenhouse gas emissions.
The Royal Society of Chemistry’s scientific assessment and other reports have indicated that implementing SRM, such as Stratospheric Aerosol Injection (SAI), could lead to negative consequences like heatwaves, droughts, ozone depletion, and disruptions to weather and climate patterns. These impacts could have severe effects on human health, marine and terrestrial species, and ecosystems.
Halted Deployment
The deployment of SAI could also disrupt hydrological cycles, influence extreme weather events, and pose significant health risks due to the inhalation of suspended particles. Moreover, the sudden halt of SAI could lead to a rapid temperature increase, known as the “termination shock,” which would be challenging to manage.
Geopolitical Risks
There are concerns about the geopolitical dynamics surrounding the research, development, and deployment of Solar Geoengineering (SG) technologies. Decision-making may not be solely guided by climate risk management but also influenced by factors like security, control, and economics. The lack of a comprehensive multilateral governance framework leaves the world vulnerable to the unchecked consequences of SG.
Weaponization Threat
The weaponization of SG technology could deepen global inequality, escalate conflicts, and be used as a strategic tool in negotiations or conflicts. There is a risk of unilateral SG initiatives being perceived as threats to national security, leading to destabilizing actions.
Tempting Measures
The US is currently the only nation with the capacity for unilateral SG deployment, raising concerns about potential radical measures under new administrations. The risks posed by framing SG as a solution to climate change or narrowing the issue to temperature alone are highlighted as tempting but potentially dangerous approaches.
Public Participation
Evaluating SG in relation to climate risks, comparing alternative approaches like degrowth or fossil fuel phase-outs, and considering geopolitical, ethical, and social risks alongside environmental ones are crucial. Public participation throughout the decision-making process is essential to identify risks and determine appropriate actions.
Conclusion
The risks and consequences of solar geoengineering are complex and far-reaching. As discussions around SG continue, it is vital to consider the potential impacts on climate, environment, geopolitics, and society. Responsible research, governance, and public participation are key to navigating the challenges posed by SG technologies.
About the Author
Monica Piccinini is a freelance writer focusing on environmental, health, and human rights issues. She is a regular contributor to The Ecologist and brings a critical perspective to complex topics like solar geoengineering.
