麻豆影视

Climate and Environment

    • Study: Winter tornadoes to get more powerful as world warms

    Share

    Nasty winter tornadoes -- like the deadly ones last week that hit five states -- are likely to be stronger and stay on the ground longer with a wider swath of destruction in a warming world, a new study shows.

    The combination of a longer and wider track with slightly stronger winds means some rare winter tornadoes that are killers now will have nine times more the power by the end of the century if carbon dioxide levels continued to rise, according to a study presented at the American Geophysical Union conference Monday.

    The study, which pre-dates the devastating Mayfield, Kentucky, tornado outbreak, looks at strength and not frequency of big tornadoes as climate change progresses. Not peer reviewed yet, it was presented in poster form as a peak at new research to be published later.

    "There is a potential for events in the future that are more intense that would not have been as intense in the current climate," said study author Jeff Trapp, head of atmospheric sciences at the University of Illinois, Urbana-Champaign. "Bearing in mind that these high end events are still going to be rare."

    Trapp took the conditions during two large tornado strikes in 2013 -- the Hattiesburg, Mississippi, tornado that in February of that year injured 82 people with winds of 170 mph and the Moore, Oklahoma, tornado that killed 24 people with winds up to 210 mph (340 kph) in May-- and put them into dozens of computer simulations of worst-case climate change scenario by 2100, which other scientists say is increasingly unlikely.

    The worst-case scenario, which the world used to be on track for, would have another 6 degrees (3.3 degrees Celsius) or so of warming between now and the end of the century. Trapp said he will soon run simulations based on a scenario closer to the current trajectory for carbon dioxide emissions of about 3.2 degrees (1.8 degrees Celsius) warming above current levels.

    Trapp found a big change on the winter storm, significantly longer and wider tracks and windspeed increases around 14% that added up to the nine-fold increase in power when using a formula that takes wind speed, rotation and size of path into account. Power increased 1.5 times for the spring storm, he said.

    Trapp said that's because there are two key ingredients needed for tornadoes: unstable stormy weather and wind shear. Wind shear, the difference between winds up high and near the ground, is usually stronger in the winter, but there's not as much stormy weather because it requires warm humid conditions near the ground. But as the world warms there will be more opportunity for instability in the winter, he said.

    Three outside scientists said there may be something to the research, but they aren't yet completely convinced.

    "I'm not 100% sold on the technique, but it's a very interesting approach," said Harold Brooks, a scientist at the National Severe Storms Laboratory in Norman, Oklahoma. "To me the really interesting result seems to be the longer-tracks for the cool season."

    A single study always raises uncertainty issues, but the results make sense, said Northern Illinois University meteorology professor Victor Gensini: "One of the major components to Friday's outbreak was the broad and anomalous warm (swath of temperatures) which permitted the storm to last for what will likely be a record-breaking path length."

    CTVNews.ca Top Stories

    Why brain aging can vary dramatically between people

    Researchers are uncovering deeper insights into how the human brain ages and what factors may be tied to healthier cognitive aging, including exercising, avoiding tobacco, speaking a second language or even playing a musical instrument.

    The union representing some 1,200 dockworkers at the Port of Montreal has overwhelmingly rejected a deal with their employers association.

    A man who was critically injured in a police-involved shooting in Hamilton late Sunday afternoon has died in hospital, says the province鈥檚 police watchdog.

    opinion

    opinion How to transition from renting to owning a home in Canada

    In his column for CTVNews.ca, personal finance contributor Christopher Liew offers a step-by-step guide on how to make the shift from renting to becoming a homeowner, and what you can start doing today to help the process go smoother.

    Canada

    World

    Politics

    • Murray Sinclair鈥檚 family members say the late justice and senator has been laid to rest according to his wishes.

    • Prime Minister Justin Trudeau announced voters in Cloverdale鈥擫angley City will pick their next member of Parliament on Dec. 16.

    Health

    • Why brain aging can vary dramatically between people

      Researchers are uncovering deeper insights into how the human brain ages and what factors may be tied to healthier cognitive aging, including exercising, avoiding tobacco, speaking a second language or even playing a musical instrument.

    • Researchers say taking a peek inside a person's brain is as difficult as understanding the universe or discovering the ocean in its entirety.

    Sci-Tech

    Entertainment

    Business

    Lifestyle

    Sports

    Autos

    Local Spotlight

    For the second year in a row, the 鈥楪ift-a-Family鈥 campaign is hoping to make the holidays happier for children and families in need throughout Barrie.

    Some of the most prolific photographers behind CTV Skywatch Pics of the Day use the medium for fun, therapy, and connection.

    A young family from Codroy Valley, N.L., is happy to be on land and resting with their newborn daughter, Miley, after an overwhelming, yet exciting experience at sea.

    As Connor Nijsse prepared to remove some old drywall during his garage renovation, he feared the worst.

    A group of women in Chester, N.S., has been busy on the weekends making quilts 鈥 not for themselves, but for those in need.

    A Vancouver artist whose streetside singing led to a chance encounter with one of the world's biggest musicians is encouraging aspiring performers to try their hand at busking.

    Ten-thousand hand-knit poppies were taken from the Sanctuary Arts Centre and displayed on the fence surrounding the Dartmouth Cenotaph on Monday.

    A Vancouver man is saying goodbye to his nine-to-five and embarking on a road trip from the Canadian Arctic to Antarctica.

    • Weather watchers were treated to an exceptionally rare display on Friday evening as rare cloud formations filled Vancouver skies.

    • For some shoppers it was Nov. 1, but for others the first hints of Christmas - saccharine treats, festive-fragranced candles and gaudily wrapped gift sets - were being noticed in stores long before the final Halloween decor had been cleared.

    • Thousands of people are expected to gather in downtown Vancouver on Monday to observe the city鈥檚 100th Remembrance Day ceremony.

    • Toronto is expected to see an economic boost to the tune of nearly $300 million thanks to Taylor Swift鈥檚 upcoming Eras Tour, which will be making a stop in Canada鈥檚 largest city for a six-show run later this month.

    • One man was transported to hospital early Monday morning after a stabbing in the northwest end of the city, Toronto police say.

    • A man who was critically injured in a police-involved shooting in Hamilton late Sunday afternoon has died in hospital, says the province鈥檚 police watchdog.

    • A pair of 105-mm howitzers bark constantly as they turn plywood tank targets into kindling kilometres away on the windswept landscape of one of Canada's largest military bases.

    • Two semis were among the vehicles involved in a multi-vehicle crash that brought westbound traffic along Stoney Trail Northwest to a standstill on Sunday.

    • More than 700 people danced, ate, and sang to celebrate Diwali Saturday night at the Genesis Centre in northeast Calgary.

    • NEW THIS MORNING

      NEW THIS MORNING

      An Ottawa boy with a rare disease will be getting the chance to see Taylor Swift in concert after the winner and organizers of an auction held on his behalf gifted the tickets to him.

    • CTVNewsOttawa.ca looks at Remembrance Day ceremonies in Ottawa.

    • After months of controversy surrounding a dog park in Ottawa's west end, a solution has been reached to divide the park in half.

    • A First Nation near Quebec City says the provincial government and Quebec鈥檚 hydro utility have ignored their constitutional duty to consult about four planned wind projects south of the Saint Lawrence River.

    • The union representing some 1,200 dockworkers at the Port of Montreal has overwhelmingly rejected a deal with their employers association.

    • Two vehicles were set on fire in Montreal鈥檚 east end Riviere-des-Prairies neighbourhood.

    • Monday is Remembrance Day, a time to honour armed forces members who have died in the line of duty.

    • Boasting 2,300 square metres of skating space at its new location, Edmonton's Rollers Roller Rink believes it is the largest in Canada.

    • A woman is dead after a driver crashed a truck through a Boston Pizza in Fort McMurray late Saturday morning.

    • A pillar in Canada鈥檚 history was honoured in Winnipeg Sunday afternoon, with thousands showing up to pay tribute to the life and legacy of the late Murray Sinclair.

    • Winnipeg police have identified two men involved in a stabbing incident earlier this week.

    • The Winnipeg Blue Bombers whipped the Saskatchewan Roughriders 38-22 in Saturday's CFL West Division final to earn their fifth consecutive trip to the Grey Cup.

    • Regina author Valerie Crowther is celebrating the release of her book 鈥榃ar Letters: Linking Lives in the Second World War.鈥

    • It was a somber day at Mosaic Stadium as members of the Saskatchewan Roughriders officially cleaned out their stalls and closed the book on the 2024 season.

    • Twilight Tech Arcade, an entertainment location specializing in retro gaming, is closing its doors for the foreseeable future.

    • A man has been charged after a stabbing at an apartment building in Kitchener.

    • The Guelph Police Service is putting out a warning after two deaths in the downtown area.

    • Two new tributes to Canada鈥檚 veterans have been unveiled at the Elmira Cenotaph.

    • Saskatchewan RCMP are searching for a suspect after a man was seriously injured in a farm-related incident in Montreal Lake.

    • It was a somber day at Mosaic Stadium as members of the Saskatchewan Roughriders officially cleaned out their stalls and closed the book on the 2024 season.

    • The Regina Rams claimed the Hardy Cup after a hard fought battle against the Saskatoon Huskies 19-14 on Saturday in the first all Saskatchewan U-Sports western conference final since 2002.

    • CTVNewsNorthernOntario.ca is livestreaming the annual Remembrance Day ceremony at the Sudbury Community Arena starting Monday at 10:30 a.m.

    • Police have arrested a 15-year-old in connection with a break-in and $50,000 in damage done to the Centennial Arena in Elliot Lake in September.

    • The events will start at 10:15 a.m. with a parade that forms up in front of the Delta London Armories, marches east on Dundas Street and turns north onto Waterloo Street to Dufferin Avenue, the west to the Cenotaph.

    • Emergency crews responded to the scene on Road 68/Highway 2 east of Thamesford around 7 p.m.

    • On Friday, the Sarnia Police Service (SPS) received a report of an alleged abduction in the area of Kathleen Avenue and Walnut Avenue.

    • A group of former NHL players faced off against York Regional Police officers in Newmarket Sunday afternoon to raise funds for Special Olympics programs across the province.

    • A driver is facing multiple charges after a multi-vehicle collision on Highway 400 early Sunday morning.

    • The agreed statement of facts was read to the court on Friday in the case of Alex Williams, the 24-year-old jail guard charged last fall with smuggling cannabis and tobacco into Central North Correctional Centre in Penetanguishene.

    • For Gene Lotz, the spark of curiosity to delve into the history of those who served in war only began when the answers became difficult to find.

    • A Tilbury race car driver and his team are partnering with St. Clair College to give students a chance to see their design circle a racetrack. Driver Nathaniel Greenaway said the competition challenged third-year graphic design students to draft a wrap for his car ahead of next season.

    • One person has been arrested after Chatham-Kent Police Service (CKPS) received multiple complaints about an alleged drunk driver.

    • Environment Canada says heavy rain and winds could cause power outages on Vancouver Island as an "intense" storm system is set to hit the B.C. coast Sunday.

    • Six deer were struck by vehicles in six different locations in a six-hour period on B.C. highways on Saturday, according to the transportation ministry.

    • The union for locked-out port workers in British Columbia says the BC Maritime Employers Association cut off talks in less than an hour Saturday, refusing to budge on a final offer that the union has so far rejected.

    • The emergency department at South Okanagan General Hospital in Oliver, B.C., will be closed for 31 hours this weekend, the second such closure in a week and the third since the start of November.

    • Police in Kamloops, B.C., are reminding parents and guardians to check their children's Halloween candy after receiving a report of a mother finding a razor blade in one of her daughter's treats.

    • More than two years after Alannah Brown and Douglas Barker were found dead north of Penticton, police are asking for help identifying a vehicle they believe was associated with the crime.

    • The Southern Alberta Recreation Association is officially announcing the Town of Taber as next year鈥檚 host for the Southern Alberta Summer Games.

    • The Lethbridge Hurricanes broke open a close game with three goals in the first two minutes of the third period as they defeated the Warriors 7-3 in a game played Friday night in Moose Jaw.

    • There might not a lot snow just yet, but many southern Albertans are still itching to get outdoors.

    • Police have arrested a 15-year-old in connection with a break-in and $50,000 in damage done to the Centennial Arena in Elliot Lake in September.

    • Mayors of the five largest cities in northern Ontario met in North Bay the last two days to discuss a range of critical issues impacting their cities and the region.

    • Residents in the Sault expressed concerns ranging from vandalism to privacy invasions during recent consultations on the city's plan to install automated speed enforcement cameras.

    N.L.

    Shopping Trends

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

    Stay Connected
    Follow 麻豆影视