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Massive ice sheets melting 'at rate of 300bn tonnes a year', climate satellite shows http://apocadocs.com/s.pl?1373855330
"In the course of the mission, it has become apparent that ice sheets are losing substantial amounts of ice - about 300 billion tonnes a year - and that the rate at which these losses occurs is increasing," said Bert Wouters of Bristol University's Glaciology Centre....
In its last report in 2007, the Intergovernmental Panel on Climate Change said that average sea levels are rising by about 2 millimetres a year. But, other scientists calculated last year that the true rate is about 3.2mm a year - about 60 per cent faster.
"Compared to the first few years of the Grace mission, the ice sheets' contribution to sea-level rise has almost doubled in recent years," added Dr Wouters, the lead author of the study published in the Earth sciences journal Nature Geoscience.
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