melting of greenland glacier to speed up study
Tuesday 4 February 2025
Last Updated : GMT 09:03:51
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Melting of Greenland glacier to speed up: study

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Almaghrib Today, almaghrib today Melting of Greenland glacier to speed up: study

Greenland glacier
Miami - Al Maghrib Today

The Greenland ice sheet is likely to melt faster in the years to come, despite a recent slowdown, researchers said Wednesday after making a new discovery about the way glaciers move.

Greenland contains enough ice to make the sea level mount 23 feet (seven meters) if it were to melt completely.

The findings in the journal Science Advances show that ice in Greenland moves more quickly over sediment than hard rock.

That means that as the world warms due to climate change, ice flow will likely speed up because the sediment beneath Greenland will become weaker, wetter and more slippery.

"Greenland's margin has many outlet glaciers that act as fast conveyor belts of ice. Thousands of surface lakes act as taps that deliver meltwater to the ice base, turning it into a slippery bathtub," said lead researcher Bernd Kulessa of the College of Science at Swansea University.

"This discovery leaves us concerned because we have so far accepted the exact opposite ?- that Greenland's icy conveyor would slow down."Researchers based their findings on seismic surveys that send acoustic waves through the ice to gain insights on the sediment underneath.

A previous theory held that glacier melt would slow down at the end of the summer "because large networks of channels drain water away at the base, increasing frictional resistance to ice flow," said the report.

But the seismic surveys showed that sediment played the key role in controlling ice sheet flow, and weakened subglacial sediment "leads to accelerated ice flow."

Ice is melting across the Arctic, as the polar region warms about twice as fast as the rest of the planet.

Source: AFP

 

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