"Sea Level Rise 'Locking In' Quickly, Cities Threatened"
"Measurements tell us that global average sea level is currently rising by about 1 inch per decade. But in an invisible shadow process, our long-term sea level rise commitment or 'lock-in' -- the sea level rise we don't see now, but which carbon emissions and warming have locked in for later years -- is growing 10 times faster, and this growth rate is accelerating."
"An international team of scientists led by Anders Levermann recently published a study that found for every degree Fahrenheit of global warming due to carbon pollution, global average sea level will rise by about 4.2 feet in the long run. When multiplied by the current rate of carbon emissions, and the best estimate of global temperature sensitivity to pollution, this translates to a long-term sea level rise commitment that is now growing at about 1 foot per decade.
We have two sea levels: the sea level of today, and the far higher sea level that is already being locked in for some distant tomorrow."Source: Climate Central, 07/30/2013