Via AFP:
The last edge of the Greenland ice sheet that had resisted global warming has now become unstable, adding billions of tonnes of meltwater to rising seas, scientists said on Sunday.
In a study published in the journal Nature Climate Change, they said a surge in temperature from 2003 had eased the brakes on a long "river" of ice that flows to the coast in northeastern Greenland.
Known as an ice stream, the "river" takes ice from a vast basin and slowly shifts it to the sea -- in the same way that the Amazon River drains water.
In the past, the flow from this ice stream had been constra...
