Data come from an expedition using the underwater robot Icefin under remote Thwaites Glacier in Antarctica. The rapid retreat of Thwaites Glacier in West Antarctica appears to be driven by processes under its floating ice shelf that are different than researchers realized. It is known as the “Doo
Melting in cracks and crevasses where ice enters the ocean at Antarctica’s Thwaites Glacier is faster than scientists thought. Credit: NASA
The rapid retreat of Thwaites Glacier in West Antarctica appears to be driven by processes under its floating ice shelf that are different than researchers realized. It is known as the “Doomsday Glacier” because of the potential threat it poses to global sea level rise.provide a clearer picture of the changes taking place under the glacier, which is the size of Florida and is one of the fastest-changing ice-ocean systems in Antarctica.
The icefin robot under the ice near McMurdo research station, operated by the US Antarctic Program. Credit: Rob Robbins USAP A layer of fresher water between the bottom of the ice shelf and the underlying ocean slows the rate of melting along flat parts of the ice shelf. However, scientists were surprised to see that the melting had formed a staircase-like topography across the bottom of the ice shelf. In these areas, as well as in cracks in the ice, rapid melting is occurring.
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