De-icing
The image shown here gives us an unobstructed view of the white continent, as if its 27 million cubic kilometers of ice had been removed. | © Image: British Antarctic Survey (BAS)

De-icing

4. April 2025 | by Thorsten Naeser

The most detailed map of the landscape under the Antarctic ice sheet to date was created by a team of international scientists led by the British Antarctic Survey (BAS) and with the participation of the Alfred Wegener Institute. The map, called “Bedmap3”, covers more than six decades of survey data and imagery collected by aircraft, satellites, ships and dogsleds. 

Bedmap3 gives us an unobstructed view of the white continent as if its 27 million cubic kilometers of ice had been removed. It reveals hidden places, the highest mountains and deepest canyons. The new data shows that the Antarctic ice sheet is thicker than previously thought and has a greater volume of ice resting on a bed of rock below sea level. This is particularly important at the edge of the continent, where the ice is in contact with the ocean. This increases the risk of more ice melting due to the intrusion of warmer ocean water.