Glaciologists unveiled the latest topographical map of Antarctica, developed by the BedMachine project, which is the most accurate profile of the land beneath the ice sheet. The researchers in the datasheet found the deepest point on continental Earth.
The lowest exposed point on land is located at the Dead Sea shore which is 413 meters (about 1,355ft) below sea level. But the lowest point on land goes even deeper, as revealed by the new BedMachine data. At about 3500 meters ( about 11500 feet) below sea-level, the world’s deepest canyon on land was found beneath Denman Glacier in East Antarctica.
While the canyon was thought to be shallow in previous studies, new data has revealed the true depth. Scientists figured out the depth of the hidden canyon by calculating the amount of ice that filled it and the law of conservation of mass. Using radar data of moving ice in the 20 kilometers-wide Denman Glacier, the researchers found that the ice was descending to over 3,500m below sea level.
The researchers, along with the Bedmachince Antarctica datasheet, have also published a study in the journal Nature Geoscience. The study presents a “high-resolution and physically-based description of Antarctic bed topography using mass conservation.”
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