Billion-dollar polar engineering ‘needed to slow melting glaciers’
Scientists have outlined plans to build a series of mammoth engineering projects in Greenland and Antarctica to help slow down the disintegration of the planet’s main glaciers. The controversial proposals include underwater walls, artificial islands and huge pumping stations that would channel cold water into the bases of glaciers to stop them from melting and sliding into the sea. The researchers say the work – costing tens of billions of dollars a time – is urgently needed to prevent polar glaciers melting and raising sea levels. That would lead to major inundations of low-lying, densely populated areas, such as parts of Bangladesh, Japan and the Netherlands. Flooding in these areas is likely to cost tens of trillions of dollars a year if global warming continues at its present rate, and vast sea-wall defences will need to be built to limit the devastation. Such costs make glacier engineering in polar regions a competitive alternative, according to the team, which is led by John Moore, professor of climate change at the University of Lapland. “We think that geoengineering of glaciers could delay much of Greenland and Antarctica’s grounded ice from reaching the sea for centuries, buying time to address global warming,” the scientists write in the current issue of Nature. “Geoengineering of glaciers has received little attention in journals. Most people assume that it is unfeasible and environmentally undesirable. We disagree.”
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on Mar 18 2018. Filed under News at Now.
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