Denman Canyon, east ofis : Filled with ice, it is 20 kilometers wide and races 3,500 meters below sea level. This gigantic model was discovered in 2019 already eroded insidiously, new study reveals in . Using the radar, the researchers were able to reconstruct the topographical development of the canyon between 1996 and 2018 COSMO – SkyMed. They found that the glacier bed had retreated 5.4 kilometers along the west flank, where hot water from the circumpolar current penetrated. from the South Atlantic and the Indian Ocean. In the east, however, the glacier is preserved by a rocky ridge.
Paradoxically, this asymmetry threatens the survival of the glacier. Because when it sinks inland, its bed plunges deep, exposing it to the ocean even more. “” If the hot water reaches the ceiling cavity and the ice continues to melt at a rate that exceeds equilibrium conditions, the Denman Glacier could retreat irreversibly “, Warn the researchers. TheIce in Denman Canyon is one 1.5 meters.