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Thwaites: ‘Doomsday Glacier’ vulnerability seen on new maps



Thwaites: 'Doomsday Glacier' vulnerability seen on new maps

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Alex Mazur

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Icebreaker Nathaniel B. Palmer mapped over 2,000 sq. Km of the seabed in front of the glacier.

Scientists may have just identified the Achilles heel of the Thwaites Glacier.

This Antarctic colossus is rapidly melting, dumping billions of tons of ice into the ocean each year and raising global sea levels.

Now the British-American team has explored the deep seabed channels in front of the glacier, which almost certainly provide warm water access to penetrate and attack the lower Thwaite.

This information will be used to try to predict the future of the ice stream.

“These channels have never been mapped in this detail before, and we found that they are actually much larger than anyone thought – up to 600 meters deep. Think of six football pitches in a row, ”said Dr. Kelly. Hogan of the British Antarctic Survey (BAS).

“And because they are so deep and so wide, it allows much more water to enter and melt Thwaites’ floating front and its ice on the seabed,” she told BBC News.

Why is Thwaites Glacier so important?

Located west of the Antarctic continent, Thwaites is almost as large as Great Britain.

It is a majestic sight with its moving front, or “ice shelf”, stretching far out to sea and discarding huge icebergs. But satellite monitoring shows that this glacier is melting faster and faster.

In the 1990s, it lost just over 10 billion tons of ice per year. Today it is more than 80 billion tons. The melting is believed to be due to the influx of relatively warm bottom water from the wider ocean.

Currently, ice loss at Thwaites represents approximately 4% of the annual rise in sea level, with the potential for a total of 65 cm to increase if the entire glacier collapses.

No one thinks this will happen in the short to medium term, but Thwaites is considered particularly vulnerable to warming, and scientists would like to know how quickly any change could occur.

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Media headlineDr. Kelly Hogan explains the significance of the new study.

What does the latest research show?

In 2019, the UK and the US joined forces to investigate the Thwaites case.

Their scientists sent a ship equipped with an echo sounder straight to the icy cliffs of the glacier to trace the shape of the seabed below.

The aircraft also flew back and forth across the shelf to measure small changes in gravity. These deviations reflected the unevenness of the seabed under the shelf.

The two datasets taken together now provide the best view of Thwaites topography. They trace the path of a network of deep channels that cross the ridge and then join to form a large cavity beneath the ice shelf.

“The associated channels, which we first mapped in detail, are potential pathways for deep-sea warm water to penetrate and damage it at the point where the glacier still rests on the seabed where it starts to rise. and swim, “BAS colleague Dr. Tom Jordan explained,” but also melt the base of the ice shelf, which, if you loosen up, will cause the ice to flow further upstream at a faster rate. ”

How will the new survey information be used?

Scientists need real-world data to capture their models so that they can get realistic results when modeling possible future behavior.

The new information clarifies the amount of warm water infiltration that can be considered possible under various scenarios.

Through their research, scientists now have a better understanding of the overall roughness of the seabed.

This tells them how fast ice can reach deep in the glacier as it slides over rocks and sediments. What the researchers have developed, if you like, is a kind of “stickiness index” that further limits computer models.

Image caption

Thwaite’s size and rate of melting has led to it being dubbed the “doomsday glacier.”

What could happen in the near future?

At the moment, the eastern side of the ice shelf is entangled with a large ridge, which gives it stability. But the current melting trend suggests that this situation won’t last long, says Dr. Robert Larter of BAS.

“When the East Ice Shelf comes loose, the ice will expand and thin out, eventually collapsing as we see what’s happening in the (central) tongue of the glacier,” he told BBC News. “Even before the ice shelf breaks down, detachment and thinning will reduce the supporting effect of the ice shelf on the glacier upstream, resulting in an increase in ice flow rate. This, in turn, will further accelerate the thinning of the glacier and the retreat of the ground line. … “

British and American scientists were forced to temporarily suspend their research at Thwaites due to the Covid-19 crisis.

The teams were supposed to return to the glacier this southern summer, but the remoteness of the site means too much risk in case someone falls ill. However, once the coronavirus outbreak is properly contained, scientists will return.

“It’s amazing to be in a place like Thwaites and see the changes happening right before your eyes,” said Dr. Hogan. “When we were there in 2019, we were able to get right up to the rocks of the ice shelf, and the reason we were able to do this and make our observations was because the icebergs and sea ice that have always been here historically are starting to disappear. … “

The latest study is published in two articles in The Cryosphere and can be accessed. Here and Here

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The dollar continues to reflect the political scenario



The dollar continues to reflect the political scenario

Yesterday, financial agents evaluated the opposite decision of the Federal Supreme Court (STF) regarding the so-called secret budget. In addition, a decision was made by STF Minister Gilmar Méndez to issue an injunction that would exclude the Bolsa Família from the spending cap rule, with investors trying to understand how this measure would affect the processing of the transitional PEC in the Chamber of Deputies. Oh this PEC!!!!

Since he is an exchange investor, any reading that the budget will be exceeded or become more flexible will negatively affect the exchange market, whether through the PEC or in any other way. We will continue with volatility today.

Looking beyond, the US Central Bank (Fed), although slowing down the pace of monetary tightening at its December meeting, issued a tougher-than-expected statement warning that its fight against inflation was not yet over, raising fears that rising US interest rates will push the world’s largest economy into recession.

The currency market continues to react to political news. The voting on the PEC is saved for today. It is expected that it will indeed be reviewed to open the way tomorrow for discussions on the 2023 budget.

Yesterday, the spot price closed the selling day at R$5.3103.

For today on the calendar we will have an index of consumer confidence in the eurozone. Good luck and good luck in business!!

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Andrés Sánchez consults with the Ministry of Sports, but refuses a political post.



The former president of the Corinthians dreams of working for the CBF as a national team coordinator. He was consulted shortly after Lula’s election.

Former Corinthians president Andrés Sánchez was advised to take a position in the Ministry of Sports under the administration of Lula (PT). However, he ruled out a return to politics. dreams of taking over the coordination of CBF selectionHow do you know PURPOSE.

No formal invitation was made to the former Corinthian representative, only a consultation on a portfolio opportunity with the new federal government, which will be sworn in on January 1, 2023.

Andrés was the Federal MP for São Paulo from 2015 to 2019. At that time he was elected by the Workers’ Party. However, the football manager begs to stay in the sport, ruling out the possibility of getting involved in politics again.

Andrés Sanchez’s desire is to fill the position of CBF tackle coordinator, which should become vacant after the 2022 World Cup. Juninho Paulista fulfills this function in Brazil’s top football institution.

The former president of Corinthians was in Qatar to follow the World Cup along with other figures in Brazilian football. During his time in the country, he strengthened his ties with the top leadership of the CBF.

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The EU has reached a political agreement on limiting gas prices – 19.12.2022



Germany sentenced Russian to life imprisonment for political murder by order of Moscow - 12/15/2021
BRUSSELS, DECEMBER 19 (ANSA). European Union countries reached a political agreement on Monday (19) to impose a natural gas price ceiling of 180 euros per megawatt hour (MWh). The main sources of income for Russia and the minimization of the use of energy as a weapon by the regime of Vladimir Putin.

The agreement was approved by a supermajority at a ministerial meeting of member states in Brussels, Belgium, after months of discussions about the best way to contain the rise in natural gas prices in the bloc caused by Russia’s invasion of Ukraine. .

The value set by the countries is well below the proposal made by the European Commission, the EU’s executive body, in November: 275 EUR/MWh. However, the countries leading the cap campaign were in favor of an even lower limit, around 100 EUR/MWh.

Germany, always wary of price controls, voted in favor of 180 euros, while Austria and the Netherlands, also skeptical of the cap, abstained. Hungary, the most pro-Russian country in the EU, voted against.

The instrument will enter into force on 15 February, but only if natural gas prices on the Amsterdam Stock Exchange exceed 180 euros/MWh for three consecutive days. In addition, the difference compared to a number of global benchmarks should be more than 35 euros.

Italy, the EU’s biggest supporter of the ceiling, has claimed responsibility for the measure. “This is a victory for Italy, which believed and worked for us to reach this agreement,” Environment and Energy Minister Gilberto Picetto tweeted.

“This is a victory for Italian and European citizens who demand energy security,” he added.

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Currently, the gas price in Amsterdam is around 110 EUR/MWh, which is already a reflection of the agreement in Brussels – in August the figure even broke the barrier of 340 EUR/MWh.

However, Russia has already threatened to stop exports to countries that adhere to the ceiling. (ANSA).

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