
© Michael Van Woert/NOAA/NESDIS/ORANew research suggests the front line of the Ross Ice Shelf is uniquely susceptible to melting caused by warm summertime water.
Deep below the frozen wastelands of Antarctica, scientists have discovered ancient tectonic plate structures that are having a huge impact on melting patterns around the continent's largest ice shelf.
The hidden rock, in place for hundreds of millions of years, is controlling water flow around the gigantic
Ross Ice Shelf. This shelf currently acts as a crucial buffer preventing more of Antarctica's ice floating out into the wider ocean.
Researchers detected said rock thanks to observations carried out by the
IcePod, a dedicated scanning system which measures ice shelf height, thickness and internal structure, and the magnetic and gravity signals of the underlying rock.
Essentially, the IcePod can peer through hundreds of metres (thousands of feet) of ice to detect underlying rock structures that satellites can't spot.
As researchers report in their newly published study, a geological boundary between East and West Antarctica has created a division underneath the continent, which is protecting the Ross Ice Shelf from warmer waters and further melting.
"We could see that the geological boundary was making the seafloor on the East Antarctic side much deeper than the West, and that affects the way the ocean water circulates under the ice shelf,"
says marine geologist Kirsty Tinto from Columbia University.
Comment: This article is the second in a series. For part 3, go here:
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