Via AFP:
Antarctica's Pine Island Glacier, one of the biggest single contributors to world sea-level rise, is melting irreversibly and could add as much as a centimetre (0.4 inches) to ocean levels in 20 years, a study said Sunday.
The glacier "has started a phase of self-sustained retreat and will irreversibly continue its decline," said Gael Durand, a glaciologist with France's Grenoble Alps University.
Durand and an international team used three different models to forecast the glacier's future based on the "grounding line," which is the area under water where the ice shelf -- a sea-floating...
