Global warming & sea level rise

A fascinating article in National Geographic about how the sea level is rising and what will happen as it rises.


This chart is particularly interesting:

[Source: http://ngm.nationalgeographic.com/2013/09/rising-seas/sea-level-chart ; click on chart to get full size]
Notice how the red line is steepening/accelerating.  It's not going to be the intermediate low, that's for sure.  The intermediate high? The high?  If we do nothing, are we are doing nothing, then ....