ASSOCIATED PRESS • October 12, 2023
Four dozen Antarctic ice shelves have shrunk by at least 30% since 1997 and 28 of those have lost more than half of their ice in that time, reports a new study that surveyed these crucial “gatekeepers’’ between the frozen continent’s massive glaciers and open ocean. Scientists worry that climate change-triggered melt from Antarctica and Greenland will cause dangerous and significant sea rise over many decades and centuries.