And it just keeps getting more interesting for our children and grandchildren. Get Ready for 7 Foot Sea Level Rise by 2100 + Antarctic Glacier Past Tipping Point : TreeHugger quick update on the state of sea level rise projections. As you can tell from the title, it's not so good. Basically, by 2100 coastal areas should being prepared for about 7 feet (2.13 meters), that's what scientists from Western Carolina and Duke universities are saying. And, according to new research done at the universities of Oxford and Cambridge, the Pine Island Glacier in Antarctica has reached a melting tipping point, which alone will eventually contribute about 9 inches (24 centimeters) of water to the world's oceans. Glacier Ground Line Steadily Retreating The word on the Pine Island Glacier comes via work published in the Proceedings of the Royal Society A which shows how changes in the 'grounding line' of an ice sheet--where it floats free from its base of rock or sediment--can lead to its disintegration. Oxford University's Dr. Richard Katz says that the model his team developed shows "how instability in the grounding line, caused by gradual climatic changes, has the potential to reach a tipping point where disintegration of the ice sheet could occur." Pine Island Glacier Melting Accelerating The leap to that tipping point being reached comes in New Scientist's write up of the research. They explain that the grounding line for the PIG passed over a crucial crest on the Antarctic sea bed back in 1996, readying the glacier for accelerated shrinking. In fact PIG is four times faster than ten years ago.