Here is a video by NASA about some new predictions of the West Antarctic ice sheet.
One of the things not mentioned is the gravity effects. The ice sheet is truly massive and affects Earths surface gravity in the region. The sea water level rises as it approaches the sheet because of the attraction of gravity. The effect of the ice melting and spreading out as liquid water is magnified because the sea water that is already there will also spread and raise sea levels.
And here is an impressive video from Greenland. I recommend watching it full screen.
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