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Tag: Iceberg
World’s biggest iceberg could be on collision course with Antarctic penguin island: “Game of Thrones-esque”
The world’s biggest iceberg — three time the size of New York City — could drift towards a remote island where a scientist warns it risks disrupting feeding for baby penguins and seals.
The gigantic wall of ice is moving slowly from Antarctica on a potential collision course with South Georgia, a crucial wildlife breeding ground in the South Atlantic.
Satellite imagery suggested that unlike previous “megabergs,” this rogue was not crumbling into smaller chunks as it plodded through the Southern Ocean, Andrew Meijers, a physical oceanographer at the British Antarctic Survey, told AFP on Friday.
He said predicting its exact course was difficult but prevailing currents suggested the colossus would reach the shallow continental shelf around South Georgia in two to four weeks.
But what might happen next is anyone’s guess, he said.
It could avoid the shelf and get carried into open water beyond South Georgia, a British overseas territory some 870 miles east of the Falkland Islands.
Or it could strike the sloping bottom and get stuck for months or break up into pieces.
Omar Zaghloul/Anadolu via Getty Images
Meijers said this scenario could seriously impede seals and penguins trying to feed and raise their young on the island. The island hosts 1.3 million pairs of Chinstrap penguins — one of the world’s largest colonies — about 5 million seals, and 65 million breeding birds.
“Icebergs have grounded there in the past and that has caused significant mortality to penguin chicks and seal pups,” he said.
Roughly 1,550 square miles across, the world’s biggest and oldest iceberg, known as A23a, calved from the Antarctic shelf in 1986. Before its calving in 1986, the colossal iceberg hosted a Soviet research station. falley
It remained stuck for over 30 years before finally breaking free in 2020, its lumbering journey north sometimes delayed by ocean forces that kept it spinning in place. In 2023, the British Antarctic Survey posted a time-lapse of satellite imagery, showing the iceberg’s movement.
“Game of Thrones-esque” iceberg
Meijers — who encountered the iceberg face to face while leading a scientific mission in late 2023 — described “a huge white cliff, 40 or 50 meters high, that stretches from horizon to horizon”.
“It’s just like this white wall. It’s very sort of Game of Thrones-esque, actually,” he said, referring to the dark fantasy series.
A23a has followed roughly the same path as previous massive icebergs, passing the east side of the Antarctica Peninsula through the Weddell Sea along a route called “iceberg alley.” That is the same current of water that famed explorer Ernest Shackleton used in 1916 to make his storied escape from Antarctica after losing his ship, the Endurance. The legendary shipwreck was discovered off the coast of Antarctica in 2022.
Weighing a little under a trillion tons, this monster block of freshwater was being whisked along by the world’s most powerful ocean “jet stream” — the Antarctic Circumpolar Current.
Raul Cordero from Chile’s University of Santiago, who is also part of the National Antarctic Research Committee, said he was confident the iceberg would sidestep South Georgia.
Andrew Meijers / AP
“The island acts as an obstacle for ocean currents and therefore usually diverts the water long before it reaches the island,” he said.
“The iceberg is moved by that water flow, so the chances of it hitting are not that high,” though chunks could, he said.
Another scientist, glaciologist Soledad Tiranti currently on an Argentinian exploration voyage in the Antarctic, said that icebergs such as A23a “are so deep that before reaching an island or mainland they generally get stuck” on the seabed.
It is summer in South Georgia and resident penguins and seals along its southern coastline are foraging in the frosty waters to bring back food to fatten their young.
“If the iceberg parks there, it’ll either block physically where they feed from, or they’ll have to go around it,” said Meijers.
“That burns a huge amount of extra energy for them, so that’s less energy for the pups and chicks, which causes increased mortality.”
The seal and penguin populations on South Georgia have already been having a “bad season” with an outbreak of bird flu “and that (iceberg) would make it significantly worse,” he said.
As A23a ultimately melted it could seed the water with nutrients that encourage phytoplankton growth, feeding whales and other species, and allowing scientists to study how such blooms absorb carbon dioxide from the atmosphere.
While icebergs are natural phenomena, Meijers said the rate at which they were being lost from Antarctica was increasing, likely due to human induced climate change.
In January 2023, a massive piece of Antarctica’s Brunt Ice Shelf — a chunk about the size of two New York Cities — broke free. The Brunt Ice Shelf lies across the Weddell Sea from the site of the Larsen C ice shelf on the Antarctic Peninsula. In 2022, the Larsen C ice shelf — which was roughly the size of New York City and was long considered to be stable — collapsed into the sea.
In a scenario straight out of a Game of Thrones episode, the world’s largest iceberg is on a collision course with a tiny Antarctic penguin island. Scientists are monitoring the massive iceberg, which is roughly the size of the state of Delaware, as it drifts ominously closer to the island.The iceberg, named A68a, broke off from the Larsen C ice shelf in 2017 and has been slowly drifting towards the island ever since. If it continues on its current path, it could potentially wreak havoc on the island’s fragile ecosystem, home to thousands of penguins and other wildlife.
Experts are scrambling to come up with a plan to mitigate the potential disaster, whether it be towing the iceberg away or creating barriers to protect the island. The fate of the penguins hangs in the balance as they face the looming threat of a catastrophic collision.
As the world watches and waits to see how this real-life Game of Thrones-esque drama unfolds, one thing is certain: the stakes couldn’t be higher for the adorable inhabitants of this remote Antarctic island.
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The world’s largest iceberg is on a collision course with vital penguin sanctuary
After breaking free in December, it’s now traveling along the Antarctic circumpolar current. “It’s the strongest current on Earth,” says Meijers.
“It’s going to head more or less straight towards [South Georgia],” says Meijers. This wildlife haven is home to fur seals, albatrosses, gentoo penguins, and more.
On its current trajectory, A23a will reach a sharp turn in the current. “The iceberg weighs a trillion tons so it’s not turning on a dime,” he says. If it overshoots, it could run aground in shallow waters until it melts enough to keep moving or break up. “It’s anyone’s guess what it might do,” he says.
The threat to South Georgia’s wildlife
Grounding near the shallow continental shelf close to South Georgia could block off routes between feeding and breeding areas for many penguin and seal colonies. This disruption “forces the adults to swim further, burn more energy and, basically, bring back less,” says Meijers, resulting in higher mortality and potentially worsening the impact of bird flu on both seals and penguins
Timing is important. “In October, the penguins decide where they’re going to nest,” says Maria Vernet, a marine ecologist at Scripps Institution of Oceanography, UC San Diego. An enormous, steep iceberg that’s “more like an apartment building,” is a bigger threat when the eggs and chicks are in the nest and utterly dependent on their parents.
In a concerning turn of events, the world’s largest iceberg is currently on a collision course with a vital penguin sanctuary. The iceberg, known as A68a, broke off from the Larsen C ice shelf in Antarctica in 2017 and has been drifting towards the South Georgia Island in the South Atlantic Ocean.The sanctuary, home to over 1.5 million penguins, is at risk of being severely impacted by the collision. The iceberg, which is roughly the size of the island itself, could disrupt the penguins’ habitat, block their access to food sources, and potentially cause widespread devastation to the population.
Scientists and conservationists are closely monitoring the situation and are exploring potential solutions to mitigate the impact of the collision. However, the sheer size and trajectory of the iceberg make it a challenging and urgent situation.
Efforts are being made to track the movement of the iceberg and assess the potential risks to the penguin sanctuary. It is crucial that immediate action is taken to protect this vital ecosystem and ensure the safety and well-being of the penguin population. Stay tuned for updates on this developing story.
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World’s Biggest Iceberg Headed Toward Penguins
Attention all penguin lovers and environmental enthusiasts! A massive iceberg, dubbed the world’s biggest, is currently on a collision course with a penguin habitat in Antarctica. The iceberg, measuring over 4,320 square miles, is drifting rapidly towards the area where a large colony of penguins reside.Scientists and conservationists are closely monitoring the situation and are working to assess the potential impact on the penguin population. If the iceberg were to reach the habitat, it could cause significant disruptions to the penguins’ breeding and feeding grounds.
Efforts are being made to come up with a plan to potentially divert the iceberg away from the penguin habitat, but time is of the essence. The fate of these adorable creatures hangs in the balance as we wait to see how this monumental natural event unfolds.
Stay tuned for updates on the world’s biggest iceberg and its journey towards the penguins. Let’s hope for a positive outcome for these beloved Antarctic residents! #SaveThePenguins #IcebergAlert
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A23a: Giant iceberg on collision course with island
Georgina RannardClimate and science reporter
Erwan RivaultData journalist
Getty ImagesThe world’s largest iceberg is on a collision course with a remote British island, potentially putting penguins and seals in danger.
The iceberg is spinning northwards from Antarctica towards South Georgia, a rugged British territory and wildlife haven, where it could ground and smash into pieces. It is currently 173 miles (280km) away.
Countless birds and seals died on South Georgia’s icy coves and beaches when past giant icebergs stopped them feeding.
“Icebergs are inherently dangerous. I would be extraordinarily happy if it just completely missed us,” sea captain Simon Wallace tells BBC News, speaking from the South Georgia government vessel Pharos.
BFSAIThe RAF recently flew over the vast iceberg as it neared South Georgia Around the world a group of scientists, sailors and fishermen are anxiously checking satellite pictures to monitor the daily movements of this queen of icebergs.
It is known as A23a and is one of the world’s oldest.
It calved, or broke off, from the Filchner Ice Shelf in Antarctica in 1986 but got stuck on the seafloor and then trapped in an ocean vortex.
Finally, in December, it broke free and is now on its final journey, speeding into oblivion.
The warmer waters north of Antarctica are melting and weakening its vast sides that extend up to 1,312ft (400m), taller than the Shard in London.
It once measured 3,900 sq km, but the latest satellite pictures show it is slowly decaying. It is now around 3,500 sq km, roughly the size of the English county of Cornwall.
And large slabs of ice are breaking off, plunging into the waters around its edges.
A23a could break into vast segments any day, which may then hang around for years, like floating cities of ice cruising uncontrollably around South Georgia.
This isn’t the first huge iceberg to threaten South Georgia and Sandwich Islands.
In 2004 one called A38 grounded on its continental shelf, leaving dead penguin chicks and seal pups on beaches as massive ice chunks blocked their access to feeding grounds.
The territory is home to precious colonies of King penguins and millions of elephant and fur seals.
“South Georgia sits in iceberg alley so impacts are to be expected for both fisheries and wildlife, and both have a great capacity to adapt,” says Mark Belchier, a marine ecologist who advises the South Georgia government.
Watch conditions at sea for sailors dodging icebergs in South Georgia Sailors and fisherman say icebergs are an increasing problem. In 2023 one called A76 gave them a scare when it came close to grounding.
“Chunks of it were tipping up, so they looked like great ice towers, an ice city on the horizon,” says Mr Belchier, who saw the iceberg while at sea.
Those slabs are still lingering around the islands today.
“It is in bits from the size of several Wembley stadiums down to pieces the size of your desk,” says Andrew Newman from Argos Froyanes, a fishing company that works in South Georgia.
“Those pieces basically cover the island – we have to work our way through it,” says Captain Wallace.
The sailors on his ship must be constantly vigilant. “We have searchlights on all night to try to see ice – it can come from nowhere,” he explains.
A76 was a “gamechanger”, according to Mr Newman, with “huge impact on our operations and on keeping our vessel and crew safe”.
Simon WallaceIce is a way of life but Simon Wallace says an experienced sailor knows to avoid icebergs All three men describe a rapidly changing environment, with glacial retreat visible year-to-year, and volatile levels of sea ice.
Climate change is unlikely to have been behind the birth of A23a because it calved so long ago, before much of the impacts of rising temperatures that we are now seeing.
But giant icebergs are part of our future. As Antarctica becomes more unstable with warmer ocean and air temperatures, more vast pieces of the ice sheets will break away.
Before its time comes to an end though, A23a has left a parting gift for scientists.
A team with the British Antarctic Survey on the Sir David Attenborough research vessel found themselves close to A23a in 2023.
The scientists scrambled to exploit the rare opportunity to investigate what mega icebergs do to the environment.
Tony Jolliffe/BBCSamples that Laura Taylor took from A23a help her research how icebergs affect the carbon cycle The ship sailed into a crack in the iceberg’s gigantic walls, and PhD researcher Laura Taylor collected precious water samples 400m away from its cliffs.
“I saw a massive wall of ice way higher than me, as far as I could see. It has different colours in different places. Chunks were falling off – it was quite magnificent,” she explains from her lab in Cambridge where she is now analysing the samples.
Her work looks at what the impact the melt water is having on the carbon cycle in the southern ocean.
Getty Images“This isn’t just water like we drink. It’s full of nutrients and chemicals, as well as tiny animals like phytoplankton frozen inside,” Ms Taylor says.
As it melts, the iceberg releases those elements into the water, changing the physics and chemistry of the ocean.
That could store more carbon deep in the ocean, as the particles sink from the surface. That would naturally lock away some of the planet’s carbon dioxide emissions that contribute to climate change.
Icebergs are notoriously unpredictable and no-one knows what exactly it will do next.
But soon the behemoth should appear, looming on the islands’ horizons, as big as the territory itself.
A23a: Giant iceberg on collision course with islandResidents of the small island of A23a are on high alert as a massive iceberg drifts dangerously close to their shores. The iceberg, which is several times larger than the island itself, has been steadily making its way towards A23a for the past week.
Authorities are closely monitoring the situation and have warned residents to prepare for a possible impact. Evacuation plans are being put into place in case the iceberg does collide with the island, posing a serious threat to the safety of the inhabitants.
Scientists are also keeping a close eye on the iceberg, studying its trajectory and trying to determine the likelihood of a collision. If the iceberg does make landfall, it could cause widespread destruction and potentially displace the entire population of A23a.
The situation is tense on A23a as residents brace themselves for a potential disaster. Stay tuned for updates on this developing story.
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World’s biggest iceberg heading toward penguin-packed island off Antarctica
The world’s biggest iceberg — a wall of ice the size of Rhode Island — is lumbering toward a remote island off Antarctica that’s home to millions of penguins and seals.
The trillion-ton slab of ice — called a megaberg — could slam into South Georgia Island and get stuck or be guided around it by currents. If it gets stuck it could make it hard for penguin parents to feed their babies and some young could even starve. Overall, however, researchers aren’t too worried about major harm from the iceberg, named A23a.
What’s happening is more spectacular than dangerous, scientists said.
It’s also a natural process happening more frequently because of human-caused climate change, said British Antarctic Survey physical oceanographer Andrew Meijers, who examined the iceberg up close in December 2023 when it drifted past the research ship RRS Sir David Attenborough.
“The iceberg itself is colossal and it stretches from horizon to horizon,” Meijers said Thursday of the 130-foot (40-meter) tall mass. “It’s a huge wall, a Game of Thrones style wall of ice that towers above the ship. With some waves breaking against it and if you get a bit of sunshine coming through, it’s really dramatic.”
For every bit of the iceberg above the water’s surface, there’s ten times more below, Meijers said.
It’s not exactly high-speed action. The iceberg is making its way at a glacial pace of one meter every three to seven seconds, much slower than one mile per hour, Meijers said.
In the next two to four weeks the iceberg will approach South Georgia where the water gets shallow, so it could wedge itself in, Meijers said. Or it could slide past.
“Large icebergs bump into the shoals around South Georgia more or less every year — it’s a kind of highway for the major icebergs,” University of Colorado ice scientist Ted Scambos wrote in an email. “This ocean current path has been known since Shackleton’s time, he said, referring to Sir Ernest Henry Shackleton who led British expeditions to the southern continent. Shackleton made the trip to the island in just three weeks. “Usually the icebergs take a bit longer (he had sails),” he said.
Eventually, this big iceberg will break up into smaller ones and melt as icebergs do, Meijers said.
At full size, it doesn’t represent much of a hazard for fishermen in the area, because they can see it. The bigger concern is penguins which are in their summer breeding cycle, Meijers said.
“South Georgia is an amazingly ecologically rich island. It’s a breeding ground for a huge number of penguins, millions of penguins and seals,” Meijers said. “There’s lots of pups and chicks and they’re all still dependent on their parents.”
The parents go out quite a way into the water and forage. Icebergs can block pathways to their food, making the adults swim farther, burning more energy, bringing back less to the babies. That “unfortunately can dramatically increase mortality rates. And it has happened in the past,” Meijers said.
That’s bad for that colony, but it doesn’t amount to a problem for overall penguin populations, Scambos said.
“The whole ecosystem in the Southern Ocean is very resilient to these events,” he wrote. “It has evolved with these icebergs being a factor for hundreds of thousands of years.”
This iceberg first broke off in 1986 but has been penned in a crowded patch of sea ice for decades until a few years ago, Meijers said.
Calving icebergs are normal, but they are happening more frequently as the climate warms and more fresh water flows into the ocean, Meijers said.
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Read more of AP’s climate coverage at http://www.apnews.com/climate-and-environment
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Scientists are closely monitoring the progress of the world’s largest iceberg as it drifts toward a penguin-packed island off the coast of Antarctica. This massive iceberg, dubbed A68a, broke off from the Larsen C ice shelf in 2017 and has been slowly making its way through the Southern Ocean ever since.The iceberg, which measures approximately 2,240 square miles in size, is currently on a collision course with Zavodovski Island, home to one of the largest colonies of chinstrap penguins in the world. The island is located in the remote South Sandwich Islands, a British overseas territory in the southern Atlantic Ocean.
Scientists are concerned that if the iceberg makes landfall on Zavodovski Island, it could have devastating consequences for the penguin population. The massive iceberg could block access to the sea for the penguins, making it difficult for them to find food and potentially leading to a significant decline in their numbers.
Efforts are underway to track the movement of the iceberg and assess the potential risks to the island and its inhabitants. Scientists are also considering possible interventions to help protect the penguins and mitigate the impact of the iceberg’s arrival.
Stay tuned for updates on this developing situation as scientists work to understand and address the potential threat to this important penguin habitat.
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A23a: Trillion tonne iceberg on collision course with South Georgia
The world’s largest and oldest iceberg, A23a a ‘mega-berg’ double the size of Greater London and weighing more than one trillion tonnes, is on the move after decades of being grounded on the seafloor – and it appears to be on a collision course with the remote British island of South Georgia.
Having broken free from its position north of the South Orkney Islands at the end of 2024 – where it had spent decades spinning on the spot in an ocean vortex – the trillion tonne ‘megaberg’ is now spinning northwards from Antarctica, and on a route that puts it one direct contact course with the British territory.
Researchers tracking the iceberg said that it was currently around 173 miles away from the remote island. Over the course of its journey so far, the warmer waters north of Antartica have started to melt and weaken A23a’s expansive cliffs. Despite this, the latest satellite imagery still puts the iceberg at roughly the size of Cornwall.
Current predictions suggest the iceberg will start to ground as it enters the South Georgia waters where it will break into smaller chunks of ice, forming what some have envisioned as a “floating city of icebergs”.
A23a is a colossal iceberg calved from Antarctica’s Filchner Ice Shelf in 1986. It had previously remained grounded on the seabed of the Weddell Sea for over 30 years, before beginning its slow journey north in 2020.
The movements of icebergs are typically unpredictable, meaning we can really only speculate as to where it might end up. If it does end up at South Georgia, however, it could have a dramatic impact on the island’s local wildlife and biodiversity, possibly blocking current pathways for feeding on the island’s beaches and coves.
South Georgia is home to a variety of wildlife, including large colonies of king emperor penguins, elephant seals and fur seals. Marine ecologist Mark Belchier told the BBC: “South Georgia sits in iceberg alley so impacts are to be expected for both fisheries and wildlife, and both have a great capacity to adapt.”
So far, A23a’s journey that has been marked by a series of intriguing scientific events. For months, the iceberg was trapped in a Taylor Column, an oceanographic phenomenon in which rotating water above a seamount traps objects in place.
It was this dynamic that kept A23a, visible from space, spinning in one spot, delaying its expected rapid drift north.
In a shocking turn of events, a trillion tonne iceberg has been spotted on a collision course with South Georgia. The massive iceberg, known as A23a, is one of the largest ever recorded and is set to cause widespread devastation upon impact.Scientists and researchers are closely monitoring the iceberg’s trajectory, and have warned that the collision could have significant environmental and ecological impacts on the region. There are concerns about the potential damage to marine life, as well as the threat of flooding and destruction to coastal communities.
Authorities are working swiftly to develop contingency plans and evacuation procedures in case of emergency. The situation is being closely monitored, and updates will be provided as new information becomes available.
Stay tuned for further developments on this unprecedented event as we continue to track the path of A23a towards South Georgia.
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Apache Iceberg is a powerful open-source table format for large-scale data that combines the best of data lakes and data warehouses. In this definitive guide, we will explore the functionality and performance of Apache Iceberg in the context of a Data Lakehouse architecture.Data Lakehouse Functionality:
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