Topic: global warming news - Huge rise in sea levels forecast if global warming ignored - Sydney Morning Herald

The warning came as a vast ice shelf, about 260 square kilometres in size, continued to fall away from Greenland's Petermann glacier, the largest iceberg shed by the island in half a century. The geoscientists told Congress Greenland might cease to exist, with the island rapidly approaching a tipping point that would see much larger masses of ice melting, pushing up the average level of oceans around the world. Temperature rises of between two and seven degrees Celsius - which are considered likely by the end of the century due to human-induced carbon emissions - would force the change, they said. Professor Richard Alley, a geoscientist at Pennsylvania State University, told the US House of Representatives committee on energy independence and global warming a sea level rise of seven metres was a realistic possibility. The Australian government is currently planning for a sea level rise of 90 centimetres by the end of the century.

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