Hear the ghostly hums of Antarctica's biggest ice shelf

19 Octobre, 2018, 14:52 | Auteur: Therese Cote
  • Hear the ghostly hums of Antarctica's biggest ice shelf

Studying the vibrations - and how they change based on changes to the ice shelf - could give researchers a sense of the effect of climate change on the region, according to University of Chicago glaciologist Douglas MacAyeal, who penned a commentator on the effect in Geophysical Research Letters.

"We discovered that the shelf almost continuously sings at frequencies of five or more cycles per second", the letter states.

With this newfound ability, researchers could use seismic stations to continuously monitor the conditions on ice shelves nearly in real time, allowing us to see how the ice shelf's snow jacket is responding to changing climate conditions.

This snow layer acts like a fur coat for the underlying ice, insulating the ice below from heating and even melting when temperatures rise.

The hum is too low in frequency to be audible to human ears, but the new findings suggest scientists could use seismic stations to continuously monitor the conditions on ice shelves in near real-time.

Being able to monitor the air temperature is particularly important, Chaput explained, because it could tell us which ice shelves are vulnerable to warming events.

Singapore ranks 2nd in global competitiveness index: WEF
Russian Federation topped the competitive table among Eurasian economies and came second behind China among the BRICS nations. WEF founder Klaus Schwab cited understanding and openness to new technologies as fundamental to a country's competitiveness.

‘Certain evidence’ of Jamal Khashoggi’s killing found at Saudi consulate: Turkish official
That could, like Trump's comments, seek to give the kingdom a way out of the global firestorm of criticism over Khashoggi's fate. Saudi officials have strongly denied any involvement in his disappearance and say that he left the consulate soon after arriving.

Skepticism over plans for 'free' high tech stadium in downtown Auckland
Former All Black lock Andy Haden also backed the waterfront stadium and said it would become an iconic part of Auckland City. The Eden Park end of the deal would see the historic stadium land cleared completely for new housing.

Winds blowing across snow dunes on Antarctica's Ross Ice Shelf cause the massive slab of ice to "sing". As storms altered dune patterns and the texture of the ice shelf's snowy surface, the pitch of the seismic tune shifted. "Basically, what we have on our hands is a tool to monitor the environment, really".

Relatively warmer waters eating away at ice shelves.

Tracking changes in the ice shelf is crucial as, after they collapse, the resulting ice can raise sea levels significantly.

Chaput told Global News that now, ice shelf monitoring is limited to satellite sweeps, which are few and far between. "And that's essentially the two forcing effects we can observe".

The team believes that monitoring vibrations could help predict if the ice shelf is about to break.

Conseillé:

  • Khashoggi

    Khashoggi "semble bien" mort, affirme Trump | États-Unis

    Des récits effroyables de torture sur fond de musique, de décapitation et de démembrement ont été relayés par la presse turque. Lui emboîtant le pas, mercredi, Frédéric Oudéa , le DG de Société Générale a également annulé sa venue au Davos saoudien.
    Maple Leafs unsure if Frederik Andersen can start vs. Penguins

    Maple Leafs unsure if Frederik Andersen can start vs. Penguins

    There is a good chance that Jack Campbell will be starting for the Kings tonight as Jonathan Quick is still injured. With the win, Toronto has won five straight and are 6-1 to start the season.
    Prince Harry and Meghan hit Bondi Beach

    Prince Harry and Meghan hit Bondi Beach

    Bondi local Charlie Adams is happy the royal couple are using their influence to shine a spotlight on mental illness and OneWave. THE Duke and Duchess of Sussex have been grilled on what they are going to name their child.
  • LeBron James loses in LA Lakers debut despite sensational start

    LeBron James loses in LA Lakers debut despite sensational start

    Bryant says he told Lakers owner Jeanie Buss to get her house in order to have a chance of getting the 33-year-old on-board. As a playoff team last season, the Trail Blazers will be a good early test for the Lakers to start the season.
    Ronaldo exit makes all the difference for Real Madrid - Luxemburgo

    Ronaldo exit makes all the difference for Real Madrid - Luxemburgo

    No use in betting, games or single club/league/player publications. "We are talking about the biggest club in the world". Real Madrid reportedly make contact with Antonio Conte to ask about the availability of the former Chelsea head coach.
    May 'to consider' extending UK's post-Brexit transition period

    May 'to consider' extending UK's post-Brexit transition period

    Others fear May is leading the country into a no-deal Brexit, when Britain leaves the bloc without a deal. According to three government officials, at least some of them were left puzzled by her presentation.
  • Karlie Kloss & Joshua Kushner Are Married! | Joshua Kushner, Karlie Kloss, Wedding

    Karlie Kloss & Joshua Kushner Are Married! | Joshua Kushner, Karlie Kloss, Wedding

    People magazine reports the couple married at a small ceremony in upstate NY and will have a larger ceremony in the spring. Karlie wore a custom Dior gown for the wedding and you can see a wedding picture on her Instagram page.
    Neymar dépasse Pelé — Brésil

    Neymar dépasse Pelé — Brésil

    C'est ce qu'a fait Neymar en délivrant une passe décisive dans les derniers instants avec le Brésil, face à l'Argentine. En termes de buts marqués, Neymar (59 buts) pourrait dépasser Pelé meilleur buteur de la Seleçao avec 77 unités.
    Honduras migrant caravan crosses Guatemala border, heads for U.S.

    Honduras migrant caravan crosses Guatemala border, heads for U.S.

    This is the second time Mr Trump has threatened Honduras's aid over migrants, in April saying it was "in play" over another group. A caravan of some 2,000 Honduran migrants is on the road in Guatemala again, hoping to reach the United States, despite U.S.
  • Pacquiao reveals next boxing match

    Pacquiao reveals next boxing match

    That stoppage came 9 years after Pacquiao's last knockout victory against Miguel Cotto in Las Vegas. Pacquiao claimed Thursday Mayweather's next fight will take place on New Year's Eve.
    Trump says 'rogue killers' may be behind Saudi journalist's disappearance

    Trump says 'rogue killers' may be behind Saudi journalist's disappearance

    Saudi Arabia finally allowed Turkish officials to enter the Istanbul consulate on Monday evening. "Mr. CONSIDERING PUNITIVE MEASURESTrump yesterday said he spoke with King Salman and was sending U.S.
    Hamilton in top five F1 drivers EVER - Alonso

    Hamilton in top five F1 drivers EVER - Alonso

    You just have to look at the points. "When the vehicle was dominating, he delivered and won the championship". Yet with so much riding on the weekend, Hamilton said now is not the time to make changes to his approach.


Populaire

Pôle emploi imite "The Voice" pour son recrutement et crée la polémique
À l'image de l'émission de TF1, le candidat est face à plusieurs recruteurs, leur siège retourné. Là on parle de personnes qui sont au chômage, parfois depuis longtemps.

Edmonton Girl Guide sells out of cookies in cannabis store lineup
Childs was raising money for Girl Guides, Canada's scouting movement for girls. People aren't always home, Childs said, so it's not always successful.

Liverpool's Sadio Mane undergoes surgery on broken left thumb
Salah and van Dijk played a full part in training on Thursday, but Klopp may be tempted not to risk two of his star assets.

New commission to scale up climate adaptation measures
Miami's mayor is joining a list of big names on a new worldwide climate change commission. Or we act now and build for a resilient future, says Kristalina Georgieva.

Bill Belichick on Khalil Mack: No one is in Lawrence Taylor’s class
We're not 100 percent sure yet if that's going to happen. "I believe in that, and I think it's important to go that route". It's simply stating that Taylor set a standard that no one has equaled. "He's day-to-day right now", Nagy said.

Amazon creates 250 jobs in Edinburgh as part of expansion
It has announced it will increase numbers at its "development centres", with a further 180 similar roles to be created in Cambridge.

Into The Spider-Verse' Song
The soundtrack for Spider-Man: Into the Spider-Verse will be released on December 14, the same day the film opens in theaters.

Gatwick sets out plans to use standby runway
The plans would see the number of passengers going through the airport rise to around 60 million by 2032. The airport said that the noise footprint would not expand, and that it could ban certain night flights.

Duke of Sussex holds hands with pregnant wife on Bondi Beach visit
When Meghan Markle visited Bondi Beach on Friday morning, fashionistas were quick to size up the Duchess of Sussex's shoes. But, being the professional she is, she added she's doing "pretty well so far".

China posts slower growth as economy feels impact of trade war
But the slowdown has been deeper than expected, prompting Chinese leaders to reverse course and encouraging banks to lend. Growth in retail spending and investment slowed, though to still-robust rates.