News / Science & Technology

    Study: Arctic Temperatures Highest in 44,000 Years

    Professor Gifford Miller is shown here collecting dead plant samples from beneath a Baffin Island ice cap. (Photo courtesy Gifford Miller, University of Colorado Boulder)
    Professor Gifford Miller is shown here collecting dead plant samples from beneath a Baffin Island ice cap. (Photo courtesy Gifford Miller, University of Colorado Boulder)

    Related Articles

    Video As North Pole Ice Melts, More Ships Take Arctic Shortcut

    Activists worry about environmental risks, but analysts say route is good for China-Europe shipping
    VOA News
    Average summer temperatures in the eastern Canadian Arctic are higher than they have been in at least the past 44,000 years and perhaps higher than at any time in the past 120,000 years, according to a new study.

    Researchers at the University of Colorado, Boulder say the warmth there exceeds that of the Early Holocene era, when the amount of the sun’s energy reaching the Northern Hemisphere in summer was roughly 9 percent greater than today.

    “The key piece here is just how unprecedented the warming of Arctic Canada is,” said professor Gifford Miller, a fellow at CU-Boulder’s Institute of Arctic and Alpine Research who led the study. “This study really says the warming we are seeing is outside any kind of known natural variability, and it has to be due to increased greenhouse gases in the atmosphere.”

    Miller and his colleagues used dead moss clumps emerging from melting ice caps on Baffin Island as tiny calendars. At four different ice caps, radiocarbon dates show the mosses had not been exposed to the elements since at least 44,000 to 51,000 years ago.

    Since radiocarbon dating is only accurate to about 50,000 years and because Earth’s geological record shows it was in a glaciation stage prior to that time, the indications are that Canadian Arctic temperatures today have not been matched or exceeded for roughly 120,000 years, Miller said.

    The researchers compiled the age distribution of 145 radiocarbon-dated plants in the highlands of Baffin Island that were exposed by ice recession during the year they were collected by the researchers. All samples collected were within 1 meter of the ice caps, which are generally receding by 2 to 3 meters a year.

    “The oldest radiocarbon dates were a total shock to me,” said Miller.

    Located just west of Greenland, the 315,999-square-kilometer Baffin Island is the fifth largest island in the world.  Most of it lies above the Arctic Circle. Many of the ice caps on the highlands of Baffin Island rest on relatively flat terrain, usually frozen to their beds.

    “Where the ice is cold and thin, it doesn’t flow, so the ancient landscape on which they formed is preserved pretty much intact,” Miller added.

    To reconstruct the past climate of Baffin Island beyond the limit of radiocarbon dating, the team used data from ice cores previously retrieved by international teams from the nearby Greenland Ice Sheet.

    The new study also showed summer temperatures cooled in the Canadian Arctic by about 5 degrees Fahrenheit from roughly 5,000 years ago to about 100 years ago – a period that included the Little Ice Age from 1275 to about 1900.

    “Although the Arctic has been warming since about 1900, the most significant warming in the Baffin Island region didn’t really start until the 1970s,” said Miller. “And it is really in the past 20 years that the warming signal from that region has been just stunning. All of Baffin Island is melting, and we expect all of the ice caps to eventually disappear, even if there is no additional warming.”

    A paper on the subject appeared online Oct. 23 in Geophysical Research Letters, a journal published by the American Geophysical Union.

    You May Like

    Vietnam Mulls Tough Measures for ‘Misbehaving’ Chinese Tourists

    Move comes after footage surfaced online of Chinese travelers harassing a banana hawker in Da Nang

    Pakistan Social Media Star's Honor Killing Fuels Debate

    Qandeel Baloch's murder puts spotlight on deadly tradition and other mistreatment of women

    This forum has been closed.
    Comment Sorting
    Comments
         
    by: Hoax from: Global
    October 25, 2013 1:02 PM
    The same secretive organization that admittedly manufactured the global warming threat in 1990 is still pushing the same hoax today, with the Club of Rome issuing an alarmist report predicting a catastrophic rise in temperatures that will decimate the planet. “Rising carbon dioxide emissions will cause a global average temperature rise of 2 degrees Celsius by 2052 and a 2.8 degree rise by 2080, as governments and markets are unlikely to do enough against climate change, the Club of Rome think tank said,” reports Reuters.

    The report, entitled, 2052: A Global Forecast for the Next Forty Years, decries improving living standards in developing countries and warns that man-made climate change could eventually kill off humans entirely. Although the report has generated a deluge of coverage in the establishment media, not one of those news stories points out that the Club of Rome admittedly manufactured the “idea” of man-made global warming back in 1990.
    On page 75 of their 1990 publication entitled The First Global Revolution, the organization outlined how they would manufacture ecological scares in order to manipulate the public into accepting the imposition of a dictatorial world government run by them.

    “In searching for a common enemy against whom we can unite, we came up with the idea that pollution, the threat of global warming, water shortages, famine and the like would fit the bill…. All these dangers are caused by human intervention… The real enemy, then, is humanity itself,” states the report.

    by: will from: chicago
    October 25, 2013 11:28 AM
    Who was there 44000 years ago, Take away the money and the bumbs will have to get real jobs.

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    Wall Already Runs Along Parts of US-Mexico Borderi
    X
    July 22, 2016 12:30 AM
    The Republican Party’s presidential nominee, Donald Trump, gained the support of many voters by saying he would build a wall to keep undocumented immigrants and drugs from coming across the border from Mexico. Critics have called his idea impractical and offensive to Mexico, while supporters say such a bold approach is needed to control the border. VOA’s Greg Flakus has more from the border town of Nogales, Arizona.
    Video

    Video Wall Already Runs Along Parts of US-Mexico Border

    The Republican Party’s presidential nominee, Donald Trump, gained the support of many voters by saying he would build a wall to keep undocumented immigrants and drugs from coming across the border from Mexico. Critics have called his idea impractical and offensive to Mexico, while supporters say such a bold approach is needed to control the border. VOA’s Greg Flakus has more from the border town of Nogales, Arizona.
    Video

    Video New HIV Tests Emphasize Rapid Results

    As the global fight against AIDS intensifies, activists have placed increasing importance on getting people to know their HIV status. Some companies are developing new HIV testing methods designed to be quick, easy and accurate. Thuso Khumalo looks at the latest methods, presented at the International AIDS conference in Durban, South Africa.
    Video

    Video African Youth with HIV Urge More Support

    HIV, the virus that causes AIDS, is the top killer of teens in sub-Saharan Africa. But many youths say their experience with the virus is unique and needs to be addressed differently than the adult epidemic. VOA South African Correspondent Anita Powell reports.
    Video

    Video Poor Residents in Cleveland Not Feeling High Hopes of Republican Convention

    With the Republican Party's National Convention underway in Cleveland, Ohio, delegates and visitors are gathered in the host city's downtown - waiting to hear from the party's presidential candidate, Donald Trump. But a few kilometers from the convention's venue, Cleveland's poorest residents are not convinced Trump or his policies will make a difference in their lives. VOA's Ramon Taylor spoke with some of these residents as well as some of the Republican delegates and filed this report.
    Video

    Video Pop-Up Art Comes to Your Living Room, Backyard and Elsewhere

    Around the world, independent artists and musicians wrestle with a common problem: where to exhibit or perform? Traditional spaces such as museums and galleries are reserved for bigger names, and renting a space is not feasible for many. Enter ArtsUp, which connects artists with venue owners. Whether it’s a living room, restaurant, office or even a boat, pop-up events are bringing music and art to unexpected places. Tina Trinh has more.
    Video

    Video With Yosemite as Backdrop, Obama Praises National Parks

    Last month, President Barack Obama and his family visited some of the most beautiful national parks in the U.S. Using the majestic backdrop of a towering waterfall in California's Yosemite National Park, Obama praised the national park system which celebrates its 100th anniversary this year. He talked about the importance of America’s “national treasures” and the need to protect them from climate change and other threats. VOA’s Julie Taboh reports.
    Video

    Video Counter-Islamic State Coalition Plots Next Steps

    As momentum shifts against Islamic State in Iraq, discussions are taking place about the next steps for driving the terrorist group from its final strongholds. Secretary of State John Kerry is hosting a counter-IS meeting at the State Department, a day after defense ministers from more than 30 countries reviewed and agreed upon a course of action. VOA Pentagon correspondent Carla Babb reports.
    Video

    Video Russia's Participation at Brazil Olympic Games Still In Question

    The International Olympic Committee has delayed a decision on whether to ban all Russian teams from competing in next month's Olympic Games in Brazil over allegations of an elaborate doping scheme. The World Anti-Doping Agency recently released an independent report alleging widespread doping by Russian athletes at the 2014 Winter Olympics in Sochi. So far, only Russian track and field athletes have been barred from the Summer Games in Brazil. VOA's Zlatica Hoke has more.
    Video

    Video Scotland’s Booming Whisky Industry Fears Brexit Hangover

    After Britain’s vote to leave the European Union, Scotland’s government wants to break away from the United Kingdom – fearing the nation’s exports are at risk. Among the biggest of these is whisky. Henry Ridgwell reports on a time of turmoil for those involved in the ancient art of distilling Scotland’s most famous product.
    Video

    Video Millennials Could Determine Who Wins Race to White House

    With only four months to go until Americans elect a new president, one group of voters is getting a lot more attention these days: those ages 18 to 35, a generation known as millennials. It’s a demographic that some analysts say could have the power to decide the 2016 election. But a lot depends on whether they actually turn out to vote. VOA’s Alexa Lamanna reports.
    Video

    Video Number of Syrian Refugees Arriving in US Jumps

    The United States is committed to resettling 85,000 refugees from around the world by October. Of that number, 10,000 will come from Syria and already some 4,000 Syrian refugees have arrived in the United States, many of them settling in the state of Illinois. As VOA’s Kane Farabaugh reports from Chicago, their arrival is not the end of a difficult journey to find peace and stability.
    Video

    Video Rio’s Trams Await Olympic Tourists

    Over the past century, many cities around the world replaced electric trams, prone to breakdowns and backups, with faster and more spacious buses. But for some reason restored antique trams are a huge tourist attraction. So it’s no wonder the authorities in Rio de Janeiro are busy restoring their city’s old tram line ahead of the Summer Olympic Games. VOA’ George Putic reports.

    Special Report

    Adrift The Invisible African Diaspora