Ethical Hacking News
A new study published today suggests that targeted use of a geoengineering technique called marine cloud brightening could weaken an emerging El Niño event by up to 50%. The technique, which involves injecting aerosols into the lower atmosphere over the ocean, produces brighter marine clouds that reflect more sunlight back into space. While promising, there are significant questions that need to be answered before researchers can even consider field experiments.
Scientists have sounded the alarm over a potentially record-breaking El Niño event due to its global consequences. A study suggests that targeted marine cloud brightening could weaken an emerging El Niño. The technique involves injecting aerosols into the lower atmosphere over the ocean to produce brighter, cooler clouds. Previous studies have shown that smoke from bushfires can have a similar effect in the southeastern subtropical Pacific Ocean. Researchers found that marine cloud brightening could weaken two historically strong El Niño events back into an ENSO-neutral state. However, there are significant questions about potential unintended consequences, such as triggering other modes of climate variability or changing heat and carbon exchange between the atmosphere and ocean.
Scientists have been sounding the alarm over the rapid development of El Niño, which could reach record-breaking strength when it peaks later this year. This is cause for concern because El Niño has global consequences that can be dangerous and incredibly costly, from ramping up extreme weather to destabilizing food systems. The study published today in the journal Science Advances suggests that targeted use of a geoengineering technique called marine cloud brightening could weaken an emerging El Niño.
The concept of marine cloud brightening was first proposed by British cloud physicist John Latham in 1990 as a means of slowing global warming. Since then, there have been numerous theoretical studies and small-scale field trials to validate its effects. The idea is simple: injecting aerosols into the lower atmosphere over the ocean produces brighter marine clouds that reflect more sunlight back into space, thereby cooling the planet.
In Wan’s study, the end goal was different. Rather than attempting to cool the entire planet, she and her colleagues wanted to see whether targeted marine cloud brightening over the southeast tropical Pacific could weaken a developing El Niño. Researchers have never actually attempted to alter the strength of El Niño using marine cloud brightening, but previous studies have shown that smoke from bushfires can brighten vast layers of low-lying clouds in the southeastern subtropical Pacific Ocean.
Using a previously established climate model, Wan and her colleagues first validated that the smoke particles were indeed the primary cause of a prolonged La Niña event that lasted from 2020 to 2023. With that confirmed, they then modeled the effects of artificially induced marine cloud brightening on two historically strong El Niño events in 1997 and 2015.
Both scenarios suggest that marine cloud brightening could have remarkably weakened these super El Niños back into an ENSO-neutral state. Under the most aggressive scenario, where marine cloud brightening was applied from June through February, it reverted these super El Niños back to a neutral event. Wan noted, “We were pretty surprised by our results.”
While the findings are promising, there are significant questions that need to be answered before researchers can even consider field experiments. One issue is that weakening El Niño with marine cloud brightening quickened the onset of a subsequent La Niña. Deliberately altering the strength of El Niño could have additional unintended consequences as well, potentially triggering other modes of climate variability or changing how heat and carbon are exchanged between the atmosphere and ocean over time.
Clearly, there is much follow-up work to do. But as another super El Niño takes shape, the study offers a glimpse of a future in which scientists could prevent its most severe impacts. By exploring innovative geoengineering techniques like marine cloud brightening, researchers hope to develop more effective strategies for mitigating the effects of climate change.
Related Information:
https://www.ethicalhackingnews.com/articles/Geoengineering-as-a-Climate-Resilience-Strategy-Harnessing-Marine-Cloud-Brightening-to-Mitigate-the-Impacts-of-El-Nio-ehn.shtml
https://gizmodo.com/scientists-say-this-climate-hack-could-stop-el-nino-before-it-starts-2000782956
Published: Wed Jul 8 14:35:30 2026 by llama3.2 3B Q4_K_M
