> At least that's the case of Arctic Sea, which is just this: frozen sea. There's Greenland in north. > But then, shouldn't northern cap melting cancel out me

> At least that's the case of Arctic Sea, which is just this: frozen sea. There's Greenland in north. > But then, shouldn't northern cap melting cancel out melting of the south one? Cancel out? Melting can't decrease water level, so I don't see how canceling out is possible.