Scientists are asking whether geoengineering could blunt the worst impacts of a looming "super" El Niño, according to new research from UC San Diego's Scripps Institution of Oceanography. The study, published in Science Advances, considers using a weather-altering technique to reduce the floods, extreme heat, and other disasters such climate patterns typically bring. It marks a significant departure from previous academic work, which has largely focused on theoretical risks rather than targeted intervention.
The research injects a practical, albeit controversial, question into climate policy circles: can humanity afford not to explore these tools as El Niños grow more powerful? The authors argue that with forecasts pointing to an especially strong event, the time to examine mitigation strategies is now. However, the paper stops short of endorsing any specific action, framing the work as a preliminary feasibility assessment.
Critically, the study does not provide specific success rates or temperature reduction estimates. It instead models hypothetical deployment scenarios, highlighting significant unknowns around regional weather disruptions and unintended consequences. The paper emphasizes that any intervention would carry substantial risks, including potential shifts in rainfall patterns across the globe.
Wider implications center on governance. No international framework currently exists to authorize or oversee a large-scale geoengineering deployment. The study suggests that an emergency super El Niño could force a reckoning with these legal and ethical voids, demanding rapid policy decisions from bodies like the United Nations or the World Meteorological Organization.
The findings have drawn skepticism from some climate scientists who argue that geoengineering distracts from the urgent need to cut greenhouse gas emissions. They caution that technological fixes could create new geopolitical tensions, especially if one nation's intervention harms another's agriculture or water supply.