A NASA panel yesterday announced widely reported finding
that global sea levels have risen about three inches since 1992
, and that these levels are expected to keep rising as much as several more feet over the next century
-- on the upper end of model-based predictions
that have been made so far. From the Sydney Morning Herald piece linked above: NASA says Greenland has lost an average of 303 gigatons [of ice] yearly for the past decade. Since it takes 360 gigatons to raise sea level by a millimetre, that would suggest Greenland has done this about eight times over just in the last 10 years or so.
"People need to be prepared for sea level rise," said Joshua Willis, an oceanographer at NASA's Jet Propulsion Laboratory in La Cañada Flintridge. "It's not going to stop."