
Scientists hunt ancient ice for climate clues
In a small, refrigerated room at a Brussels university, parka-wearing scientists chop up Antarctic ice cores tens of thousands of years old in search of clues to our planet's changing climate.
Trapped inside the cylindrical icicles are tiny air bubbles that can provide a snapshot of what the earth's atmosphere looked like back then. "We want to know a lot about the climates of the past because we can use it as an analogy for what can happen in the future", said Harry Zekollari, a glaciologist at Vrije Universiteit Brussel (VUB).
Zekollari was part of a team of four that headed to the white continent in November on a mission to find some of the world's oldest ice — without breaking the bank.
Ice dating back millions of years can be found deep inside Antarctica, close to the South Pole, buried under kilometres of fresher ice and snow. But that's hard to reach and expeditions to drill it out are expensive.
A recent EU-funded mission that brought back some 1.2-million-year-old samples came with a total price tag of around $12.8 million. To cut costs, the team from VUB and the nearby Universite Libre de Bruxelles (ULB) used satellite data and other clues to find areas where ancient ice might be more accessible.
Belgian scientists holds blue ice samples in a laboratory in Brussels. - AFP
BLUE ICE
Just like the water it is made of, ice flows towards the coast — albeit slowly, explained Maaike Izeboud, a remote sensing specialist at VUB. And when the flow hits an obstacle, say a ridge or mountain, bottom layers can be pushed up closer to the surface.
In a few rare spots, weather conditions like heavy winds prevent the formation of snow cover — leaving thick layers of ice exposed.
Named after their colouration, which contrasts with the whiteness of the rest of the continent, these account for only about one per cent of Antarctica territory.
"Blue ice areas are very special", said Izeboud. Her team zeroed in on a blue ice stretch lying about 2,300 metres above sea level, around 60 kilometres from Belgium's Princess Elisabeth Antarctica Research Station.
Some old meteorites had been previously found there — a hint that the surrounding ice is also old, the researchers explained.
A container camp was set up and after a few weeks of measurements, drilling and frozen meals, in January the team came back with 15 ice cores totalling about 60 metres in length.
These were then shipped from South Africa to Belgium, where they arrived in late June.
Inside a stocky cement ULB building in the Belgian capital, they are now being cut into smaller pieces to then be shipped to specialised labs in France and China for dating.
Zekollari said the team hopes some of the samples, which were taken at shallow depths of about 10 meters, will be confirmed to be about 100,000 years old.
A Belgian scientist handles blue ice samples in a laboratory in Brussels. - AFP
CLIMATE 'TREASURE HUNT'
This would allow them to go back and dig a few hundred metres deeper in the same spot for the big prize. "It's like a treasure hunt", Zekollari, 36, said, comparing their work to drawing a map for "Indiana Jones".
"We're trying to cross the good spot on the map... and in one and a half years, we'll go back and we'll drill there", he said.
"We're dreaming a bit, but we hope to get maybe three, four, five-million-year-old ice".
Such ice could provide crucial input to climatologists studying the effects of global warming.
Climate projections and models are calibrated using existing data on past temperatures and greenhouse gases in the atmosphere — but the puzzle has some missing pieces. — AFP

Try Our AI Features
Explore what Daily8 AI can do for you:
Comments
No comments yet...
Related Articles


Observer
16 hours ago
- Observer
‘Project Hail Mary' sends Ryan Gosling and Comic-Con, into outer space
Comic-Con attendees got their first glimpse on Saturday at the new sci-fi space thriller 'Project Hail Mary', starring Ryan Gosling, ahead of its arrival in US theatres in March 2026. Gosling was joined on a convention panel by directing duo Christopher Miller and Phil Lord, as well as screenwriter Drew Goddard and book author Andy Weir — whose previous novel 'The Martian' was also turned into an Oscar-nominated film starring Matt Damon. Based on Weir's 2021 book of the same title, 'Project Hail Mary' follows astronaut Ryland Grace (Gosling), a science teacher waking up to learn he was recruited for a space mission to save Earth from an existential solar threat. Gosling described his character as 'a scared guy who has to do something impossible'. 'I knew it would be brilliant, because it's Andy [Weir]', Gosling told the crowd. 'It took me places I've never been. It showed me things I had never seen. It was as heartbreaking as it was funny and I was... not just blown away, but also overwhelmed'. Weir for his part said it was 'so cool' to see his book come to life and complimented Gosling for giving 'many layers to this character I made up'. Lord and Miller, the Oscar-winning duo behind the 'Spider-Verse' Spider-Man animated films, talked about the challenges of shooting a 'crazy ambitious' film which takes place inside a spaceship for the most part. 'We had to build an entire spaceship in two modes of gravity and then we built this entire massive tunnel at scale', Miller said. 'This is insane, to build a tunnel that was like 100 feet (30 metres) long, filled up an entire stage'. The event also showcased various clips from the film, receiving a positive response from fans, who noted the bond formed between Gosling's character and an alien named Rocky. 'The relationship between these two characters is the heart of the movie', Miller said. 'I loved it', attendee April Rodriguez, who also read the book, gushed about the film. 'I just never, like, envisioned it that way. So that was pretty cool'. — AFP


Observer
18-07-2025
- Observer
Scientists hunt ancient ice for climate clues
UMBERTO BACCHI In a small, refrigerated room at a Brussels university, parka-wearing scientists chop up Antarctic ice cores tens of thousands of years old in search of clues to our planet's changing climate. Trapped inside the cylindrical icicles are tiny air bubbles that can provide a snapshot of what the earth's atmosphere looked like back then. "We want to know a lot about the climates of the past because we can use it as an analogy for what can happen in the future", said Harry Zekollari, a glaciologist at Vrije Universiteit Brussel (VUB). Zekollari was part of a team of four that headed to the white continent in November on a mission to find some of the world's oldest ice — without breaking the bank. Ice dating back millions of years can be found deep inside Antarctica, close to the South Pole, buried under kilometres of fresher ice and snow. But that's hard to reach and expeditions to drill it out are expensive. A recent EU-funded mission that brought back some 1.2-million-year-old samples came with a total price tag of around $12.8 million. To cut costs, the team from VUB and the nearby Universite Libre de Bruxelles (ULB) used satellite data and other clues to find areas where ancient ice might be more accessible. Belgian scientists holds blue ice samples in a laboratory in Brussels. - AFP BLUE ICE Just like the water it is made of, ice flows towards the coast — albeit slowly, explained Maaike Izeboud, a remote sensing specialist at VUB. And when the flow hits an obstacle, say a ridge or mountain, bottom layers can be pushed up closer to the surface. In a few rare spots, weather conditions like heavy winds prevent the formation of snow cover — leaving thick layers of ice exposed. Named after their colouration, which contrasts with the whiteness of the rest of the continent, these account for only about one per cent of Antarctica territory. "Blue ice areas are very special", said Izeboud. Her team zeroed in on a blue ice stretch lying about 2,300 metres above sea level, around 60 kilometres from Belgium's Princess Elisabeth Antarctica Research Station. Some old meteorites had been previously found there — a hint that the surrounding ice is also old, the researchers explained. A container camp was set up and after a few weeks of measurements, drilling and frozen meals, in January the team came back with 15 ice cores totalling about 60 metres in length. These were then shipped from South Africa to Belgium, where they arrived in late June. Inside a stocky cement ULB building in the Belgian capital, they are now being cut into smaller pieces to then be shipped to specialised labs in France and China for dating. Zekollari said the team hopes some of the samples, which were taken at shallow depths of about 10 meters, will be confirmed to be about 100,000 years old. A Belgian scientist handles blue ice samples in a laboratory in Brussels. - AFP CLIMATE 'TREASURE HUNT' This would allow them to go back and dig a few hundred metres deeper in the same spot for the big prize. "It's like a treasure hunt", Zekollari, 36, said, comparing their work to drawing a map for "Indiana Jones". "We're trying to cross the good spot on the map... and in one and a half years, we'll go back and we'll drill there", he said. "We're dreaming a bit, but we hope to get maybe three, four, five-million-year-old ice". Such ice could provide crucial input to climatologists studying the effects of global warming. Climate projections and models are calibrated using existing data on past temperatures and greenhouse gases in the atmosphere — but the puzzle has some missing pieces. — AFP


Observer
16-07-2025
- Observer
Harry Potter series to debut in 2027
Filming has begun on a Harry Potter TV series that will debut in 2027, bringing the Hollywood hit to the small screen for the first time. Adapted from the wildly popular books, which have also yielded blockbuster films and stage shows, the latest outing for the boy who lived is being filmed at Warner Bros. Studios in Leavesden, Britain, the studio said Monday. While no exact release date has been confirmed, the show will be available on the HBO Max streaming platform. The franchise sees the eponymous Potter plucked from non-magical obscurity and thrust into a wizarding world in which he and his close friends Ron and Hermione battle against the forces of darkness. With the mega-selling books' author JK Rowling among its executive producers, the show is envisaged as "a decade-long series" featuring a new cast from the films. Potter will be played by Dominic McLaughlin, Arabella Stanton will star as Hermione Granger, and Alastair Stout will take on the role of Ron Weasley. Established stars will appear alongside them, with John Lithgow playing headmaster Albus Dumbledore, Paapa Essiedu as Severus Snape and Nick Frost as Rubeus Hagrid. Rowling has faced accusations of transphobia in recent years for placing an emphasis on biological sex over gender identity in comments about trans women. She denies the accusation. —AFP