Written September 6th,
2022 09:07a.m. By Li Cohen
CBS News
The loss of a glacier the size of Florida in Antarctica could wreak havoc on the world as scientists expect it would raise global sea levels up to 10 feet. It's already melting at a fast rate — and scientists say its collapse may only rapidly increase in the coming years.
The Thwaites Glacier is the widest on Earth at about 80 miles in width. But as the planet continues to warm, its ice, like much of the sea ice around Earth's poles, is melting. The rapidly changing state of the glacier has alarmed scientists for years because of the "spine-chilling" global implications of having so much additional water added to the Earth's oceans, sparking its nickname of the "doomsday glacier."
The loss of a glacier the size of Florida in Antarctica could wreak havoc on the world as scientists expect it would raise global sea levels up to 10 feet. It's already melting at a fast rate — and scientists say its collapse may only rapidly increase in the coming years.
The Thwaites Glacier is the widest on Earth at about 80 miles in width. But as the planet continues to warm, its ice, like much of the sea ice around Earth's poles, is melting. The rapidly changing state of the glacier has alarmed scientists for years because of the "spine-chilling" global implications of having so much additional water added to the Earth's oceans, sparking its nickname of the "doomsday glacier."
The loss of a glacier the size of Florida in Antarctica could wreak havoc on the world as scientists expect it would raise global sea levels up to 10 feet. It's already melting at a fast rate — and scientists say its collapse may only rapidly increase in the coming years.
The Thwaites Glacier is the widest on Earth at about 80 miles in width. But as the planet continues to warm, its ice, like much of the sea ice around Earth's poles, is melting. The rapidly changing state of the glacier has alarmed scientists for years because of the "spine-chilling" global implications of having so much additional water added to the Earth's oceans, sparking its nickname of the "doomsday glacier."
And while that may seem like a positive signal, it's actually a sign that things could soon accelerate. "Similar rapid retreat pulses are likely to occur in the near future," the study says.
"Thwaites is really holding on today by its fingernails," study co-author and British Antarctic Survey marine geophysicist Robert Larter said in a news release. "We should expect to see big changes over small timescales in the future — even from one year to the next — once the glacier retreats beyond a shallow ridge in its bed."
"Our results suggest that pulses of very rapid retreat have occurred at Thwaites Glacier in the last two centuries, and possibly as recently as the mid-20th Century," said lead author Alastair Graham, of the University of South Florida's College of Marine Science.
The more the glacier thins out, the shorter amount of time it will be before another amplified melting event, the study says, and recent observations of the glacier increase the probability that such an event could occur "in coming decades."
Not even a year ago, scientists warned that Thwaites' last ice shelf — the only brace that remains to prevent it from total collapse — may only last a few more years. Warm water seeping underneath the giant block of ice is a major contributor to its melting, and could help lead to the shelf's final collapse within as little as five years.
Warm water was first discovered beneath the glacier at its grounding zone in 2020. The year before, researchers also discovered a massive cavity nearly the size of Manhattan under the glacier.
"Just a small kick to Thwaites could lead to a big response," Graham said.
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Antarctica's "doomsday glacier" could raise global sea levels by 10 feet. Scientists say it's "holding on today by its fingernai
The Florida-sized glacier could have a major impact on sea levels, and scientists say the rate at which it's melting could rapidly increase in the coming years.
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