Over the past few years, a large fracture has grown across a large floating ice shelf on the Antarctic Peninsula. The world is watching the ice shelf, now poised to break off an iceberg the size of Delaware into the ocean.
It’s not a new phenomenon; this “thumb” of Antarctica, which juts out into the stormy Southern Ocean, has lost more than 28,000 square kilometers of floating ice — almost as large as Massachusetts — over the past half-century. This has included the complete disintegration of four ice shelves, the floating extensions of glaciers.