Global sea-level rise associated with the possible collapse of the West Antarctic Ice Sheet has been significantly underestimated in previous studies, meaning sea level in a warming world will be greater than anticipated, according to a new study.
The report features new calculations for what researchers refer to as a water expulsion mechanism. This occurs when the solid bedrock the West Antarctic Ice Sheet sits on rebounds upward as the ice melts and the total weight of the ice sheet decreases.
The bedrock sits below sea level so when it lifts, it pushes water from the surrounding area into the ocean, adding to global sea-level rise.
The new predictions show that in the case of a total collapse of the ice sheet, global sea-level rise estimates would be amplified by an additional meter within 1,000 years.