The World's Biggest Glacier May Be Melting Faster Than Previously Believed
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The Thwaites Glacier in West Antarctica is the world's largest and widest glacier. The massive ice sheet stretches 80 miles (129 km) across, roughly the size of Florida. The glacier loses about 50 billion tons of ice annually and already accounts for about 4 percent of the planet's current sea level rise. If it were to melt completely, it could raise global sea levels by about two feet (61 cm). This would displace millions of people in coastal communities worldwide. It is no wonder the ice mass has been nicknamed "Doomsday Glacier."
The glacier's erosion is largely attributed to the downward-sloping land on which it sits. This allows warm seawater to seep underneath and melt it from below. Researchers have known about this phenomenon for decades. However, a new study indicates that the Thwaites Glacier is being exposed to more warm ocean water than previously thought. This could cause it to melt at a much faster rate than scientists had initially estimated.
The research team was led by Professor Eric Rignot at the University of California, Irvine (UC Irvine). They reached this conclusion after analyzing satellite data collected from March to June 2023. The scientists found that during each 12-hour tidal cycle, warm seawater moves underneath the glacier for about four miles (6.4 km). This is a much longer distance than previously thought. As the tide retreats, it leaves the warm seawater behind and carries the freshwater from the melting glacier into the ocean. This constant inflow of freshwater adds to sea level rise over time.
"There are places where the water is almost at the pressure of the overlying ice, so just a little more pressure is needed to push up the ice," says Rignot. "The water is then squeezed enough to jack up a column of more than half a mile of ice."
The scientists revealed their findings in the journal Proceedings of the National Academy of Sciences on May 20, 2024. They believe the new evidence suggests sea levels could rise to a dangerous degree faster than current estimates.
"We really, really need to understand how fast the ice is changing, how fast it is going to change over the next 20 to 50 years,” said Christine Dow, an associate professor at the University of Waterloo and one of the study’s authors. “We were hoping it would take a hundred, 500 years to lose that ice. A big concern right now is if it happens much faster than that.”
Resources: ScientificAmerican.com, Forbes.com, news.uci.edu
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23 Comments
nathansteere23 monthsIf global warming does happen, the ocean would rise 230 feet or 70 meters, flooding anything below 230 feet above sea level. a world wide flood. Stop pollution=stop global warming=stop melting glaciers=stop rising waters. Stop global warming, before it's to late.
soso11203 monthsThis is why we need to stop the global warming maybe some country’s place could get drowned
jayalove4 monthsThis is because of pollution, i hope it takes a long, long time
435sasha4 monthsMy mother was from Antartica. She loves it there!
dogo23irene4 monthsCool!!!
1mass4 monthsCool
- dogo23irene5 monthsI hope that glacier don’t melt. We really should stop global warming!!!
koalaqueen5 monthsOh no this is bad.I rily whant to go to Antarctica
iceyqueen5 monthsWow.. It's devastating how much harm we are doing to our environment. If we keep this up, we will be submerged underwater.....
girly_pop325 monthsThat's bad and I don't like water I only like drinking it. well being submerged underwater would be a little fun but after a while it wouldn't be fun anymore. 😥- dogo23irene4 monthsI totally agree with you!!! I can't imagine being submerged underwater......SO DEVASTATING!!! Again,we should stop global warning.
olivenottamat05 monthscrazy right
victoria_wise5 months*Sigh* Just a matter of time before it really happens.
deborahmarie5 monthsIt's scary how quickly the glacier is going to melt, there really isn't much time.
