ÐÇ¿Õ´«Ã½

Climate and Environment

    • Massive amount of water found below Antarctica's ice sheet for 1st time

    The team of researchers spent six weeks in Antarctica. (Source: Kerry Key, Columbia University via CNN) The team of researchers spent six weeks in Antarctica. (Source: Kerry Key, Columbia University via CNN)
    Share

    Hidden deep below the ice sheet that covers Antarctica, scientists have discovered a massive amount of water.

    The groundwater system, found in deep sediments in West Antarctica likely to be the consistency of a wet sponge, reveals an unexplored part of the region and may have implications for how the frozen continent reacts to the climate crisis, .

    "People have hypothesized that there could be deep groundwater in these sediments, but up to now, no one has done any detailed imaging," said the study's lead author, Chloe Gustafson, a postdoctoral researcher at the University of California San Diego's Scripps Institution of Oceanography, in a news statement.

    "Antarctica contains 57 metres (187 feet) of sea level rise potential, so we want to make sure we are incorporating all of the processes that control how ice flows off of the continent and into the oceans. Groundwater is currently a missing process in our models of ice flow," she added via email.

    The ice cap that covers Antarctica isn't a rigid whole. Researchers in Antarctica have discovered in recent years hundreds of interconnected liquid lakes and rivers cradled within the ice itself. But this is the first time the presence of large amounts of liquid water in below-ice sediments has been found.

    The authors of this study, which published in the journal Science on Thursday, concentrated on the 60-mile-wide (96.6-kilometre-wide) Whillans Ice Stream, one of a half-dozen streams feeding the Ross Ice Shelf, the world's largest, at about the size of Canada's Yukon Territory.

    Gustafson and her colleagues spent six weeks in 2018 mapping the sediments beneath the ice. The research team used geophysical instruments placed directly on the surface to execute a technique called magnetotelluric imaging.

    The technique can detect the differing degrees of electromagnetic energy conducted by ice, sediment, bedrock fresh water and salt water and create a map from these different sources of information.

    "We imaged from the ice bed to about five kilometers (3.1 miles) and even deeper," said coauthor Kerry Key, an associate professor of earth and environmental sciences at Columbia University, in a separate statement.

    The researchers calculated that if they could squeeze the groundwater from the sediments in the 100 square kilometres (38.6 square miles) they mapped onto the surface, it would form a lake that ranged from 220 to 820 metres (722 to 2,690 feet) deep.

    "The Empire State Building up to the antenna is about 420 metres (1,378 feet) tall," Gustafson, who did the research as a graduate student at Columbia University's Lamont-Doherty Earth Observatory, said in the statement.

    "At the shallow end, our water would go up the Empire State Building about halfway. At the deepest end, it's almost two Empire State Buildings stacked on top of each other. This is significant because subglacial lakes in this area are two to 15 metres (6.6 to 49 feet) deep. That's like one to four stories of the Empire State Building."

    HOW DID IT GET THERE?

    The mapping revealed that the water got saltier with depth, which was a result of how the groundwater system formed.

    Ocean water likely reached the area during a warm period 5,000 to 7,000 years ago, saturating the sediment with salty seawater. When the ice advanced, fresh meltwater produced by pressure from above and friction at the ice base was forced into the upper sediments. It probably continues to filter down and mix into the groundwater today, Key said.

    The researchers said more work needed to be done understand the implications of the groundwater discovery, particularly in relation to climate crisis and rising sea levels.

    It was possible that the slow draining of water from the ice into the sediment could prevent water from building up at the base of the ice -- acting as a brake for the ice's forward motion toward the sea.

    However, if the surface ice cap were to thin, the reduction in pressure could allow this deep water to well up. This upward movement would lubricate the base of the ice and accelerate its flow.

    "This finding highlights groundwater hydrology as a potentially critical piece in understanding the effect of water flow on Antarctic ice sheet dynamics," Winnie Chu, an assistant professor at the Georgia Institute of Technology, wrote in a commentary on the research that was published in Science. She was not involved in the study.

    CTVNews.ca ÐÇ¿Õ´«Ã½

    BREAKING

    BREAKING

    Police say three people were injured after an individual armed with a knife entered a Montreal-area Islamic cultural centre Friday afternoon.

    Since she was a young girl growing up in Vancouver, Ginny Lam says her mom Yat Hei Law made it very clear she favoured her son William, because he was her male heir.

    The search for a missing six-year-old boy in Shamattawa is continuing Friday as RCMP hope recent tips can help lead to a happy conclusion.

    BREAKING

    BREAKING

    A 15-year-old boy who was the subject of an emergency alert in New Brunswick has been arrested.

    An Ontario man says it is 'unfair' to pay a $1,500 insurance surcharge because his four-year-old SUV is at a higher risk of being stolen.

    Canada

    • The search for a missing six-year-old boy in Shamattawa is continuing Friday as RCMP hope recent tips can help lead to a happy conclusion.

    • BREAKING

      BREAKING

      A 15-year-old boy who was the subject of an emergency alert in New Brunswick has been arrested.

    • For the last seven-and-half months, Toronto resident Heather McArthur has been living out what she describes as her 'worst nightmare.' On Feb. 7, her then three-year-old son Jacob along with his father Loc Phu 'Jay' Le departed for what was supposed to be a week-long visit to Vietnam to celebrate the Lunar New Year with family, McArthur says.

    • BREAKING

      BREAKING

      Michael Ford, Ontario's minister of citizenship and multiculturalism, says he is taking a leave of absence from cabinet to prioritize his health.

    • Emergency crews in northern Ontario found the bodies of four people inside a home where a fire broke out Thursday night.

    • Since she was a young girl growing up in Vancouver, Ginny Lam says her mom Yat Hei Law made it very clear she favoured her son William, because he was her male heir.

    World

    Politics

    Health

    • A Nova Scotia woman has applied for a medically assisted death, saying after years of battling to receive out-of-country surgery for an illness that causes 'indescribable' pain, she struggles to maintain the will to live.

    Sci-Tech

    Entertainment

    • Getting a photograph of a rainbow? Common. Getting a photo of a lightning strike? Rare. Getting a photo of both at the same time? Extremely rare, but it happened to a Manitoba photographer this week.

    • It will be the last show for longtime children's TV star Ron (Buck Shot) Barge as a memorial is held Friday in Calgary.

    Business

    Lifestyle

    Sports

    • Agreement in principle has been reached to build a new NHL arena at LeBreton Flats has been reached between the Ottawa Senators and the National Capital Commission (NCC), the two sides announced Friday.

    • F1 star Max Verstappen punished over bad word

      Formula One points leader Max Verstappen was ordered to 'accomplish some work of public interest' after uttering an inappropriate word Thursday at the news conference ahead of the Singapore Grand Prix.

    • The Winnipeg Jets have some huge holes to fill on both offence and defence this season.

    Autos

    Local Spotlight

    Getting a photograph of a rainbow? Common. Getting a photo of a lightning strike? Rare. Getting a photo of both at the same time? Extremely rare, but it happened to a Manitoba photographer this week.

    They say a dog is a man’s best friend. In the case of Darren Cropper, from Bonfield, Ont., his three-year-old Siberian husky and golden retriever mix named Bear literally saved his life.

    A growing group of brides and wedding photographers from across the province say they have been taken for tens of thousands of dollars by a Barrie, Ont. wedding photographer.

    Paleontologists from the Royal B.C. Museum have uncovered "a trove of extraordinary fossils" high in the mountains of northern B.C., the museum announced Thursday.

    The search for a missing ancient 28-year-old chocolate donkey ended with a tragic discovery Wednesday.

    The Royal Canadian Mounted Police is celebrating an important milestone in the organization's history: 50 years since the first women joined the force.

    It's been a whirlwind of joyful events for a northern Ontario couple who just welcomed a baby into their family and won the $70 million Lotto Max jackpot last month.

    A Good Samaritan in New Brunswick has replaced a man's stolen bottle cart so he can continue to collect cans and bottles in his Moncton neighbourhood.

    David Krumholtz, known for roles like Bernard the Elf in The Santa Clause and physicist Isidor Rabi in Oppenheimer, has spent the latter part of his summer filming horror flick Altar in Winnipeg. He says Winnipeg is the most movie-savvy town he's ever been in.

    • New Democrat Leader David Eby has launched his British Columbia election campaign a day early, making the key battle ground of Surrey his first stop.

    • The seats from a stolen e-bike that was customized for a Surrey, B.C., child with complex health needs have been recovered – but the bike itself has yet to be found.

    • Thousands of protesters are expected to march into downtown Vancouver on Friday, demanding more action from their government to address the growing climate crisis.

    • Police have arrested an 18-year-old woman who allegedly stole a Porche and then ran over its owner in an incident that was captured on video.

    • BREAKING

      BREAKING

      Michael Ford, Ontario's minister of citizenship and multiculturalism, says he is taking a leave of absence from cabinet to prioritize his health.

    • The Ford government is considering restricting Ontario municipalities from installing new bike lanes that would require the removal of lanes of traffic, a source confirms to CTV News Toronto.

    • It will be the last show for longtime children's TV star Ron (Buck Shot) Barge as a memorial is held Friday in Calgary.

    • China's ongoing ban on Canadian beef appears to have no end in sight, making it a textbook example of the uncertainty Canadian exporters continue to face in that market.

    • Alberta Health Services says an E. coli outbreak at a daycare in Blackfalds has ended.

    • Agreement in principle has been reached to build a new NHL arena at LeBreton Flats has been reached between the Ottawa Senators and the National Capital Commission (NCC), the two sides announced Friday.

    • Maplewood Secondary School is scheduled to open Monday after receiving a permit Friday morning allowing 50 per cent of the building to be occupied.

    • Police in western Quebec say a driver has been arrested after almost crashing into a school bus near La Pêche Friday morning.

    • BREAKING

      BREAKING

      Police say three people were injured after an individual armed with a knife entered a Montreal-area Islamic cultural centre Friday afternoon.

    • A new garden and microforest, years in the making, have been inaugurated at John Abbott College in Montreal.

    • The Montreal couple from Mexico and their three children facing deportation have received a temporary residence permit.

    • Mounties say there was an increased police presence in the Emerald Hills area of Sherwood Park on Friday morning as officers searched for a man who is wanted by police.

    • There are plenty of fun happenings in Edmonton this weekend. It's time to savour that last little bit of the summer season before the leaves really start coming down.

    • Alberta Health Services says an E. coli outbreak at a daycare in Blackfalds has ended.

    • BREAKING

      BREAKING

      A 15-year-old boy who was the subject of an emergency alert in New Brunswick has been arrested.

    • A Nova Scotia woman has applied for a medically assisted death, saying after years of battling to receive out-of-country surgery for an illness that causes 'indescribable' pain, she struggles to maintain the will to live.

    • A black bear that was tranquilized in a park in Dartmouth, N.S., has been released back into the wild, according to the Nova Scotia Department of Natural Resources and Renewables (DNRR).

    • The search for a missing six-year-old boy in Shamattawa is continuing Friday as RCMP hope recent tips can help lead to a happy conclusion.

    • A Manitoba veterinary clinic has two new ways of figuring out what’s causing a horse to be lame.

    • Manitoba's government says it will encourage the development of renewable energy in the province while acknowledging fossil fuels aren't going away any time soon.

    • Arguments between UR Pride and the Government of Saskatchewan on the Parents’ Bill of Rights will be moving ahead to the Court of Appeal for Saskatchewan beginning on Monday, Sept. 23.

    • Driving into the tunnels of Nutrien's Rocanville mine, the largest potash mine in the world by production volume, feels like driving down a lonely highway in the middle of the night.

    • Levels of hydrogen sulfide gas are being monitored at Brantford Collegiate Institute after a leak in their geothermal system.

    • Ontario police say they have arrested four members of the Hells Angels Motorcycle Club (MC) and seized a number of firearms after an alleged assault and robbery in Hamilton in July.

    • The second-degree murder trial of Thomas Hamp is being adjourned until December so an expert witness central to the trial can testify.

    • A 69-year-old woman from Outlook, Saskatchewan is dead and three people are injured after a truck and SUV collided on Highway 15 on Thursday.

    • A gym teacher at a private Christian school in Saskatoon has been charged. Terra MacEwan, 44, is charged with assault with a weapon. A Saskatoon mother who spoke with CTV News says her autistic son was MacEwan's victim.

    • Emergency crews in northern Ontario found the bodies of four people inside a home where a fire broke out Thursday night.

    • Since she was a young girl growing up in Vancouver, Ginny Lam says her mom Yat Hei Law made it very clear she favoured her son William, because he was her male heir.

    • A 26-year-old driver from Surrey, B.C., has been charged with three counts of criminal negligence in a crash that killed two youths in northern Ontario last year.

    • The Elgin Community Health Hub, operated by the Thames Valley Family Health Team, is accepting new patients to a model where doctors are rarely seen.

    • Members of the 2SLGBTQ+ community and supportetrs greatly outnumbered the people attending a '1 Million March 4 Children' event along Central Avenue.

    • Today, the 71 year old is marking 50 years a paramedic. He said he never aspired to move into management or a desk job, he enjoys being on the road, helping patients too much.

    • Two men from Barrie have been charged after a deadly shooting at a park in Keswick on Wednesday.

    • Provincial police are investigating vandalism in Huntsville after the "senseless destruction" of flower displays along Main Street East.

    • A 17-year-old from Markham is facing serious charges after an August 11 shooting at a party in Caledon.

    • Windsor police say a 25-year-old mother has been charged with the drowning death of her 5-year-old child in the family’s backyard pool.

    • There is no threats to public safety following an incident involving a gun at a local high school.

    • A LaSalle couple has won $1 million after buying a ticket for the Aug. 13 LottoMax draw.

    • New Democrat Leader David Eby has launched his British Columbia election campaign a day early, making the key battle ground of Surrey his first stop.

    • The Old Man Lake wildfire near Sooke is the only one currently burning on Vancouver Island. It’s a region of the province that this year saw a drastic drop in blazes in the backcountry.

    • The Nuu-chah-nulth Tribal Council (NTC) has declared a state of emergency in all 14 of its member First Nations due to a mental health and opioid crisis.

    • A pair of runaway pigs are in the custody of an animal sanctuary in the Okanagan after evading police and volunteers for hours earlier this week.

    • The Red Bridge, a historic landmark in Kamloops, B.C., was completely destroyed by fire early Thursday morning.

    • Animal protection officers in British Columbia have rescued three pit bulls – including one that gave birth to 10 puppies – from a rat-infested home in Kelowna.

    • A Vulcan, Alta., man has been charged with a Lethbridge woman's murder after her body was found in the Oyen area.

    • A Lethbridge couple got a good reminder as to why you should keep your vehicle doors locked at all times.

    • Lethbridge residents who live near the police range can expect to hear plenty of shots fired Wednesday and Thursday.

    • A 26-year-old driver from Surrey, B.C., has been charged with three counts of criminal negligence in a crash that killed two youths in northern Ontario last year.

    • Ontario Provincial Police say three suspects from southern Ontario have been charged and drugs worth $300,000 have been seized following a traffic stop Sept. 16.

    • A Brampton driver, 27, was charged this week when northern Ontario police stopped the SUV he was driving on Highway 17 after a reported shooting and found more than $100,000 in cash.

    N.L.

    Shopping Trends

    The Shopping Trends team is independent of the journalists at CTV News. We may earn a commission when you use our links to shop. Read about us.

    Stay Connected
    Follow CTV News