View Comments Facts that you didn’t know and likely won’t care about (26 Photos) » random-pointless-facts-22 Author: Bob | January 17, 2012 | In: Interesting, WTF Tweet Thanks! Jim This is incorrect. An ice sheet by definition is grounded (e.g. the Antarctic Ice Sheet, the Greenland Ice Sheet; the Islandic Vatnajokull Ice Sheet). What you are talking about is the arctic sea ice. blog comments powered by Disqus