A Super El Niño is forecasted to be the most intense in decades, posing a significant threat to global economies and human lives due to its potential to fuel extreme weather events. In response, a group of scientists has been investigating the possibility of using a controversial technique known as solar geoengineering to temporarily diminish the impacts of severe El Niños.
What is Solar Geoengineering?
Solar geoengineering involves reflecting sunlight away from the Earth to cool the planet. The specific method being considered is called marine cloud brightening, which entails spraying particles into ocean clouds to increase their reflectivity.
The researchers, led by scientists at Scripps Institution of Oceanography, utilized a natural experiment to test the concept. They analyzed the effects of particles from Australia’s 2019 and 2020 bushfires, which mixed with clouds over the Pacific Ocean and contributed to a subsequent La Niña event. This event tends to bring down global temperatures.
Findings and Implications
The study found that targeted marine cloud brightening could weaken El Niño’s impacts and increase the cooling and drying effects associated with La Niña by 40%. However, the technique’s deployment would need to be carefully timed to maximize its effectiveness.
Despite the potential benefits, geoengineering is a highly debated topic due to concerns about its safety, ethics, and potential for unintended consequences. Experts warn about the technical challenges, such as generating particles of the right size and quantity, and the risk of overdoing it, which could lead to a mega La Niña event with severe weather impacts.
The researchers emphasize that their study is not advocating for geoengineering but rather exploring its potential as a temporary tool to mitigate the effects of extreme El Niño events. They acknowledge the need for further research to understand the technique’s viability and address the ethical and technical concerns surrounding it.
Original reporting: El Paso News (HLL/CB) — read the source article.
