This is the best tl;dr I could make, original reduced by 82%. (I’m a bot)
It found that 34% of the area of all Antarctic ice shelves-around half a million square kilometers-including 67% of ice shelf area on the Antarctic Peninsula, would be at risk of destabilization under 4°C of warming.
“We know that when melted ice accumulates on the surface of ice shelves, it can make them fracture and collapse spectacularly. Previous research has given us the bigger picture in terms of predicting Antarctic ice shelf decline, but our new study uses the latest modelling techniques to fill in the finer detail and provide more precise projections.”
Citation: Third of Antarctic ice shelf area at risk of collapse as planet warms retrieved 8 April 2021 from https://phys.org/news/2021-04-antarctic-ice-shelf-area-collapse.