When it comes to ice in Antarctica, out of sight is not out of mind.
Warm ocean currents circulating off the coast of Antarctica are indirectly contributing to rising global sea levels. As these twisting flows meander around the continent's frozen edges and beneath the underside of floating ice shelves, they're slowly melting the ice from below. Using surface elevation measurements collected during NASA's ICESat mission, scientists have found that this melting is driving most of Antarctica's recent ice losses—particularly in West Antarctica, where inland glaciers that feed into the ice shelves are draining ice into the ocean at an accelerated rate. The visualization below shows the interaction of modeled ocean currents and Antarctic ice shelves, where red areas represent ice thicker than about 1,800 feet and blue areas represent ice thinner than about 650 feet. Notice how the ice shelves generally become thinner—a rainbow of colors indicates intermediate thicknesses—as they extend farther from land.