“Doomsday Glacier” Meltdown Accelerates: Could This Hidden Ice Trigger Global Catastrophe Sooner Than Predicted?
Imagine Antarctica’s icy diva, the infamous ‘Doomsday Glacier,’ teetering right on the edge, flirting with its melting point like it’s on a thrilling reality show nobody signed up for. According to a brand-new study fresh out of Nature Communications, scientists have been digging deep—literally 4,000 meters beneath the sea—to uncover the quirky secrets sealed in ancient clay beneath the West Antarctic Ice Sheet. These clay deposits, especially a mineral called kaolinite, have been whispering tales of how the glacier behaved during the warm episodes of the past 800,000 years. Spoiler alert: every time the mercury rose, the kaolinite vanished, signaling epic retreats of the ice. Now, with global warming jamming the accelerator, it seems like we might be hurtling toward a tipping point faster than ever—think of it as an “interglacial on steroids,” to borrow a scientist’s incredibly vivid phrase. So, will the ‘Doomsday Glacier’ finally lose its cool, and what chaotic encore would that ice meltdown perform for the entire world? Buckle up, because this story has waves—sea-level waves—that reach all the way to our doorsteps.
A new study has suggested that Antarctica’s ‘Doomsday Glacier’ may be close to reaching its melting point.
In a new study, published in the journal Nature Communications, scientists examined the region’s West Antarctic Ice Sheet (WAIS), which contains the Thwaites, or ‘Doomsday’, Glacier to gain a better understanding of how the ice sheet has reacted to previous warming periods.
In order to learn more about the history of the WAIS, researchers extracted clay from the ancient mud and sediment cores beneath the ice sheet to study it.
And the results revealed that deposits of kaolinite clay held the key to understanding the glacier’s past.
After recovering sediment cores from 4,000m below the sea surface, researchers found that during every interglacial warming period over the past 800,000 years, levels of kaolinite dropped to near zero.
The study was carried out amid concerns about ice loss in the Antarctic (Mario Tama/Getty Images)
“When the kaolinite signal at our drill-core sites suddenly collapses, it tells us the marine-based ice in the Amundsen Sea sector of the West Antarctic – including Thwaites and Pine Island glaciers – must have melted and retreated far back into the continent’s interior,” Dr Claus-Dieter Hillenbrand, the British Antarctic Survey (BAS) marine geologist who led the study, explained.
When searching to understand why the ice retreated at certain stages, researchers came across a second mineral, smectite, which is found much farther north in the Pacific Ocean.
This leads scientists to believe that deep warm-water currents were responsible for the ice sheet melting. What’s more, researchers also believe that current global warming is bringing us towards the tipping point faster than in any other period of history.
“What we found, to my surprise, is that even under natural conditions we had at least a partial collapse of the West Antarctic Ice Sheet. What we are doing now is making it much worse,” Dr Hillenbrand added.
What would happen if the Doomsday Glacier were to collapse entirely?
As the name ‘Doomsday’ suggests, the complete melting of the Thwaites Glacier would have a knock-on effect around the world.
Collapsing glaciers could lead to a rising sea levels, leaving coastal and low-lying areas of the UK vulnerable (Lucy North/MI News/NurPhoto via Getty Images)
According to BAS calculations, sea levels would rise by 65cm if Thwaites were to collapse, and an additional 51cm if Pine Island were to melt alongside it, causing a substantial rise in sea levels.
This would most likely lead to storm surges and coastal erosion.
In a worst-case scenario, if the entire West Antarctic Ice Sheet were to collapse, sea levels could increase by as much as three to five metres.
If this were to happen, then low-lying areas of the UK, such as coastal areas between Lancaster and Liverpool, as well as areas in East Yorkshire, Norfolk and the Thames Estuary, would be vulnerable.
“I’m personally convinced that future generations will see substantial sea-level rise,” Dr Rob Larter, a BAS marine geophysicist and study co-author, added.
“How fast we’ll see that rise is really difficult to say. This study shows that even in past natural warm periods we had a lot of ice loss, but what we’re living in now is an interglacial on steroids.”
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