Warning over stability of massive ice sheet
A massive ice sheet lying in the Antarctic could be more unstable than scientists first thought and might start shrinking, according to new research. Scientists have discovered a basin the size of Wales close to the edge of the West Antarctic Ice Sheet which could impact on how it moves. The sub-glacial basin - nearly 1.2 miles (2km) deep in some places - was uncovered during radar mapping of the ice-covered landscape at the Weddell Sea. The basin measures 62 miles (100km) by 124 miles (200km) and suggests the area is “on the threshold of change”, the project leader said.