[AbeKrieger]

When it melts it should occupy the same volume as it displaced in water when it was frozen. No rise in levels.

Except of course if the ice were atop a landmass and its runoff flowed into the ocean. Is there really enough ice atop landmasses for this to happen?

[claudiustg]

---Is there really enough ice atop landmasses for this to happen?---

That will be a tough one for Mr. Wizard to answer!