according to scientists at the International Congress on Climate Change, which has just ended. The IPCC report did not include ice melt from Greenland and Antarctic ice sheets because of uncertainty about the mechanics of glaciers that exit to the sea. Recent data on acceleration of outlet glaciers has reduced this uncertainty and the IPCC predictions are now thought be too low.
http://climatecongress.ku.dk/newsroom/rising_sealevels/
The final press release is also worth a read.
http://climatecongress.ku.dk/newsroo..._key_messages/