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The reference was to no more permanent ice in the Arctic. Arctic ice floats. Floating ice displaces its mass in seawater. When it melts, it becomes fresh water, displacing roughly the same volume of seawater as it did before, so minimal change in sea level. The main problem with loss of arctic ice is that water absorbs much more sunlight than ice, contributing to a positive feedback loop.

The Greenland ice sheet, and Antarctic ice are a completely different story. Their melting will raise sea levels directly.




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