Scientific American: Sea level rise estimates are going to need to be revised upward: A portion of the West Antarctic Ice Sheet that is home to some of the fastest-flowing glaciers on the continent appears to have entered a state of retreat and melt that is "unstoppable,' two new studies have found.
"It has passed the point of no return,' said Eric Rignot, lead author on one of the studies and a glaciologist at the University of California, Irvine, and NASA's Jet Propulsion Laboratory.
The West Antarctic Ice Sheet...