Scientists Propose Marine Cloud Brightening to Counter El Nino

Injecting aerosols into the stratosphere to reflect sunlight could mitigate the extreme weather triggered by super El Nino events. Researchers at UC San Diego argue that by brightening clouds over the Pacific, the global economy might avoid trillions in climate-related damages associated with severe droughts and heatwaves.

Editorial·July 14, 2026·reads: 2,748

Scientists Propose Marine Cloud Brightening to Counter El Nino

The proposed strategy, detailed in Science Advances, focuses on marine cloud brightening—a form of solar geoengineering designed to cool the Earth's surface. By simulating historical data from the 1997 and 2015 El Nino events, the team found that this intervention could boost regional cooling and drying effects by 40 percent. Lead researcher Kate Ricke suggests that while the approach requires further study, it offers a targeted alternative to broader responses against greenhouse gases.

Despite the findings, the scientific community remains divided. Coauthor Jessica Wan noted that the method would require continuous application to be effective, raising questions about long-term sustainability. Critics, including Texas A&M professor Andrew Dessler, warn that current climate models are imperfect and that artificial intervention carries the risk of unforeseen, potentially catastrophic side effects. Many experts argue that such technology serves as a dangerous distraction from the primary necessity of reducing carbon emissions, leaving the proposal as a theoretical tool rather than an immediate plan of action.