19 Mar '12, 2pm

Engineer wants to stop Arctic warming with a cloud-whitening machine

Painting your roof white can (maybe ) reflect enough heat to save a year’s worth of emissions . So painting the clouds white should be able to reflect enough heat to stop global warming, right? At least, that’s the theory recently put forth by an eminent U.K. engineer who wants to “whiten clouds” to prevent Arctic ice loss. Engineer Stephen Salter wants to build massive “cloud-whitening” towers in the Faroe Islands or on islands in the Bering Strait in order to keep Arctic temperatures from climbing. In summer, seawater would be pumped up to the top using some kind of renewable energy, and out through the nozzles that are now being developed at Edinburgh University, which achieve incredibly fine droplet size. In an idea first proposed by U.S. physicist John Latham, the fine droplets of seawater provide nuclei around which water vapor can condense. This makes the average dr...

Full article: http://grist.org/list/engineer-wants-to-stop-arctic-warmi...

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