[5thGenTexan]

That's patently false except for a minor thermal expansion. Put ice cubes in a glass of water. The author hasn't heard about Archimedes and the displacement of water?

Not that I agree with the global warmists, but their contention is that warming will melt the ice above ground and the seas (polar caps, glaciers, etc.), run into it and cause the sea level to rise. So displacement from floating ice is not part of it.

But even if all the ice on earth melted, how much of a percentage would the water volume of the sea go up? I bet in the hundredths of a percent.

[Ultra Sonic 007]

If all the ice on, say, Antarctica melted, the sea level would rise by approximately 66 meters.

Of course, such an occurrence would have to be incremental (via natural disasters) or sudden (through an apocalyptic cataclysm).