Runaway W. Antarctic ice sheet collapse not 'inevitable': studyThe runaway collapse of the West Antarctic Ice Sheet -- which would trigger catastrophic sea level rise -- is not "inevitable", scientists said Monday following research that tracked the region's recent response to climate change.New research published Monday suggests a complex interaction of factors affecting the melting of the West Antarctic Ice Sheet, which is home to the enormous and unstable Pine Island and Thwaites glaciers -- nicknamed the "Doomsday glacier" -- that together could raise global sea levels by more than three metres (10 feet)."I think we still have to live and plan and do our sea level projections and coastal planning with a hypothesis that the West Antarctic Ice Sheet is destabilised and we will get three and a half meters of sea level rise just from this area of the planet alone," he said, adding however that this would happen "over centuries to millennia".Levermann has researched ideas including using snow cannons to pump trillions of tons of ice back on top of the frozen region.Other suggestions have included constructing Eiffel Tower-sized columns on the seabed to prop it up from below, and a 100m-tall, 100-kilometre-long berm to block warm water flowing underneath."