BBC: Climate change: The ‘insane’ plan to save the Arctic’s sea-ice

One issue is that the saltier ice may melt more quickly in the summer.

And then there’s the huge logistical challenge of scaling the project up to a meaningful level – one estimate suggests that you could need about 10 million wind-powered pumps to thicken sea-ice across just a tenth of the Arctic.

“It is quite insane in my opinion that this could be done at scale for the entire Arctic Ocean,” says Julienne Stroeve, a professor of polar observation and modelling at University College London.

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