Ask climate scientists how fast the world’s oceans are creeping upward, and many will say 3.2 millimeters per year. But the number, based on satellite measurements taken since the early 1990s, is a long-term average. In fact, the global rate varied so much over that period that it was hard to say whether it was holding steady or accelerating. It was accelerating, big time. Faster melting of Greenland’s ice has pushed the rate to 4.8 millimeters per year.
>> read more …