WASHINGTON POST • December 13, 2021
Scientists have discovered a series of worrying weaknesses in the ice shelf holding back one of Antarctica’s most dangerous glaciers, suggesting that this important buttress against sea level rise could shatter within the next three to five years. Until recently, the ice shelf was seen as the most stable part of Thwaites Glacier, a Florida-sized frozen expanse that already contributes about 4 percent of annual global sea level rise. Because of this brace, the eastern portion of Thwaites flowed more slowly than the rest of the notorious “doomsday glacier.” But new data show that the warming ocean is eroding the eastern ice shelf from below. Total collapse of Thwaites could result in several feet of sea level rise, scientists say, endangering millions of people in coastal areas.