Asked by Mike This is a tricky question to answer. The West Antarctic Ice Sheet has a global eustatic sea level contribution of 3.2 m[1] – that is, if all the ice in this area melted, global sea level would rise by 3.2 m. The Antarctic Peninsula Ice Sheet would contribute 0.24 m to global … Continue reading If all the ice in Antarctica were to melt, how much would global sea level rise? How quickly is this likely to happen?