'Glacial earthquakes' warn of global warming

Dramatic new evidence has emerged of the speed of climate change in the polar regions which scientists fear is causing huge volumes of ice to melt far faster than predicted.

Scientists have recorded a significant and unexpected increase in the number of "glacial earthquakes" caused by the sudden movement of Manhattan-sized blocks of ice in Greenland.

A second study has found that higher temperatures caused by global warming could melt the Arctic and Antarctic ice sheets much sooner than previously thought, with a corresponding rise in sea levels.

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Take a look at the Florida your grandchildren will inherit...

London 'under water by 2100' as Antarctica crumbles into the sea

The first study to combine computer models of rising temperatures with records of the ancient climate has indicated that sea levels could rise by up to 20ft (6m) by 2100, placing millions of people at risk.

The threat comes from melting ice sheets in Greenland and Antarctica, which scientists behind the research now believe are on track to release vast volumes of water significantly more quickly than older models have predicted. Their analysis of events between 129,000 and 116,000 years ago, when the Arctic last warmed to temperatures forecast for 2100, shows that there could be large rises in sea level.

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