Post by mhbruin on Sept 5, 2022 7:41:04 GMT -8
What to you do when you see an endangered animal eating an endangered plant?
A Glacier the Size of Florida is Coming for Florida
Antarctica’s so-called “doomsday glacier” – nicknamed because of its high risk of collapse and threat to global sea level – has the potential to rapidly retreat in the coming years, scientists say, amplifying concerns over the extreme sea level rise that would accompany its potential demise.
The Thwaites Glacier, capable of raising sea level by several feet, is eroding along its underwater base as the planet warms. In a study published Monday in the journal Nature Geoscience, scientists mapped the glacier’s historical retreat, hoping to learn from its past what the glacier will likely do in the future.
They found that at some point in the past two centuries, the base of the glacier dislodged from the seabed and retreated at a rate of 1.3 miles (2.1 kilometers) per year. That’s twice the rate that scientists have observed in the past decade or so.
That swift disintegration possibly occurred “as recently as the mid-20th century,” Alastair Graham, the study’s lead author and a marine geophysicist at the University of South Florida, said in a news release.
It suggests the Thwaites has the capability to undergo a rapid retreat in the near future, once it recedes past a seabed ridge that is helping to keep it in check.
“Thwaites is really holding on today by its fingernails, and 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,” Robert Larter, a marine geophysicist and one of the study’s co-authors from the British Antarctic Survey, said in the release.
The Thwaites Glacier, located in West Antarctica, is one of the widest on Earth and is larger than the state of Florida. But it’s just a faction of the West Antarctic ice sheet, which holds enough ice to raise sea level by up to 16 feet, according to NASA.
As the climate crisis has accelerated, this region has been closely monitored because of its rapid melting and its capacity for widespread coastal destruction.
The Thwaites Glacier itself has concerned scientists for decades. As early as 1973, researchers questioned whether it was at high risk of collapse. Nearly a decade later, they found that – because the glacier is grounded to a seabed, rather than to dry land – warm ocean currents could melt the glacier from underneath, causing it to destabilize from below.
A Glacier the Size of Florida is Coming for Florida
Antarctica’s so-called “doomsday glacier” – nicknamed because of its high risk of collapse and threat to global sea level – has the potential to rapidly retreat in the coming years, scientists say, amplifying concerns over the extreme sea level rise that would accompany its potential demise.
The Thwaites Glacier, capable of raising sea level by several feet, is eroding along its underwater base as the planet warms. In a study published Monday in the journal Nature Geoscience, scientists mapped the glacier’s historical retreat, hoping to learn from its past what the glacier will likely do in the future.
They found that at some point in the past two centuries, the base of the glacier dislodged from the seabed and retreated at a rate of 1.3 miles (2.1 kilometers) per year. That’s twice the rate that scientists have observed in the past decade or so.
That swift disintegration possibly occurred “as recently as the mid-20th century,” Alastair Graham, the study’s lead author and a marine geophysicist at the University of South Florida, said in a news release.
It suggests the Thwaites has the capability to undergo a rapid retreat in the near future, once it recedes past a seabed ridge that is helping to keep it in check.
“Thwaites is really holding on today by its fingernails, and 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,” Robert Larter, a marine geophysicist and one of the study’s co-authors from the British Antarctic Survey, said in the release.
The Thwaites Glacier, located in West Antarctica, is one of the widest on Earth and is larger than the state of Florida. But it’s just a faction of the West Antarctic ice sheet, which holds enough ice to raise sea level by up to 16 feet, according to NASA.
As the climate crisis has accelerated, this region has been closely monitored because of its rapid melting and its capacity for widespread coastal destruction.
The Thwaites Glacier itself has concerned scientists for decades. As early as 1973, researchers questioned whether it was at high risk of collapse. Nearly a decade later, they found that – because the glacier is grounded to a seabed, rather than to dry land – warm ocean currents could melt the glacier from underneath, causing it to destabilize from below.