Huh:
Scientists have posited that the West Antarctic Ice sheet, which is sitting on bedrock below sea level, could potentially experience a catastrophic collapse event if sea water was able to access the roots of this glacier… the entire ice sheet could collapse over a period as short as a few years, which, if the entire thing went, would lead to 6 to 9 meters of sea level rise, enough to submerge a large number of urban cores around the world and utterly remake coastlines.
From Ice at Hivewired
Recommended.