Massive Antarctic iceberg threatens ocean circulation

New Scientist: The calving of a massive iceberg off east Antarctica last week has prompted fears that the event could alter the salinity of the surrounding ocean, with damaging effects on marine life and global ocean currents. The 860-billion-tonne berg, with a surface area of about 2500 square kilometres, had formed 50 per cent of a 100-kilometre tongue poking out of the Mertz glacier. Major fractures had been developing for years, so the break was anticipated, say Rob Massom and Neal Young ......

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