Some climate scientists, see such projects as distractions from more permanent climate solutions
That’s one eyebrow-raising approach for cooling our planet proposed by a group of astrophysicists in a study published Wednesday in PLOS Climate. The team used computer simulations to model various scenarios where massive quantities of dust in space can reduce the amount of Earthbound sunlight by 1 to 2 percent, or up to about six days of an obscured sun in a year.
Yet those ideas have run into myriad issues: Too much material is needed. It would require construction in space. It’s dangerous. Irreversible.Photo by WMAP Science Team/NASA“The literature around space-based geoengineering now spans more than three decades and is filled with creative, often outlandish ideas,” Chad M. Baum, a behavioral scientist at Aarhus University who was not involved in the new study, said in an email.
Perhaps the greatest challenge is getting the right material exactly where you need it, Bromley said. “While we did not calculate these explicitly, we know from the space program that this effort would be daunting,” Kenyon, an astrophysicist at the Smithsonian Astrophysical Observatory, said in an email.
“We haven’t solved the climate change problem yet, so these novel ideas are great [for] eliciting reactions from both the public and scientific community,” Yonekura, a scientist at the Rand Corp., said in an email. “Solar geoengineering – though highly controversial – does not seem to be off the table, and these new solution ideas help provide alternative approaches that weigh differently in a cost-benefit analysis.
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