Scientists say dimming the sun could spark global chaos

Scientists at Columbia University are cautioning that stratospheric aerosol injection (SAI), a proposed method to combat global warming by reflecting sunlight with particles in the upper atmosphere, is far more complex and risky than previously thought. While hundreds of models have explored SAI's potential, researchers argue these simulations oversimplify real-world challenges such as particle size, release altitude, latitude, timing, and quantity. A study published in Scientific Reports highlights that SAI could disrupt tropical monsoons if concentrated near the poles or alter jet streams if released near the equator. The team suggests a centralized approach would be necessary for effective implementation but acknowledges geopolitical realities make this unlikely.

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