As Antarctica’s slow rivers of ice hit the sea, they float, forming ice shelves. These shelves extend the glaciers into the ocean until they calve into icebergs.
But they also play a crucial role in maintaining the world as we know it, by acting as a brake on how fast the glaciers can flow into the ocean. If they weren’t there, the glaciers would flow faster into the sea and melt, causing sea levels to rise.
Unfortunately, Antarctica’s ice shelves are not what they were. In research published today in Nature, we show these ice shelves have significantly reduced in area over the last 25 years due to more and more icebergs breaking off. Overall, the net loss of ice is about 6,000 billion tonnes since 1997.
