Not all the ice in the Artic is landbound. In fact most of it is floating.<quoted text>
Not only are you barking up the wrong tree, you have the tree confused with a sailboat. Landbound ice displaces ZERO ZILCH NADA NO water until it enters a body of water. Even so, if you float a bucket containing either a lb of ice or a lb. of water, both will displace EXACTLY the same volume of water. 2 ships can weigh the same and have a completely different densities - but they still DISPLACE THE SAME tonnage. This is ELEMENTARY, so I'll provide you with a simple link even a grade schooler should be able to understand.
Nice to see that you are capable of learning.