Research Spotlight: Assessing regional impacts of geoengineering


  • Ernie Tretkoff


As the climate warms along with rising levels of atmospheric carbon dioxide (CO2), geoengineering has been suggested as an emergency option to cool the planet. One possibility is implementing a solar radiation management project, such as injecting sulfate aerosols into the stratosphere or deploying a solar “sunshade,” to counteract global warming by decreasing the amount of sunlight that reaches Earth's surface. However, a global intervention would have different regional impacts. For instance, geoengineering could result in decreased precipitation and increased droughts in some regions, with serious consequences for some human populations.