News / USA

    US Extreme Weather Consistent With Climate Change

    Scientists say storms likely to become more frequent and intense

    Residents of Joplin, Mo, walk west on 26th Street near Maiden Lane after a tornado hit the southwest Missouri city on Sunday evening, May 22, 2011. The tornado tore a path a mile wide and four miles long destroying homes and businesses. (AP Photo/Mike Gul
    Residents of Joplin, Mo, walk west on 26th Street near Maiden Lane after a tornado hit the southwest Missouri city on Sunday evening, May 22, 2011. The tornado tore a path a mile wide and four miles long destroying homes and businesses. (AP Photo/Mike Gul

    Multimedia

    Audio
    Rosanne Skirble

    The powerful tornadoes and other extreme weather events that have cut swaths of destruction across the United States over the past month have prompted many to wonder if they are part of a new trend. Are these violent storms the result of climate change, or can they be explained as normal weather variations?

    This has been a record year for tornadoes in the United States. North America seems to be especially hard hit.

    "We have probably the most tornadoes when you think about the square mileage where we get them," says David Imy, operations chief at the National Oceanic and Atmospheric Administration’s Storm Prediction Center, "and also the more intense tornadoes and the reasoning happens to be the Rocky Mountains."

    Watch related Suzanne Presto video report

    According to Imy, the Rocky Mountain range prevents moisture from the Gulf of Mexico from spreading westward and forces it to concentrate over the midsection of the country.

    "Also it gives us dry air aloft that comes in and makes it more favorable for severe storms and tornadoes," says Imy, adding that the more than 200 tornadoes in the past month alone is an anomaly, "… compared to many other years that we’ve looked at. It’s hard to say that there is any trend in what we’re seeing this year. And so far we haven’t seen any differences in other parts of the world."

    But does the record U.S. tornado season have anything to do with global climate change?

    "It is almost impossible for us to pinpoint these specific events...and say they were caused by climate change," says William Chamedies, an atmospheric scientist and dean of the Nicolas School of the Environment at Duke University. "On the other hand we do know that because of climate change those kinds of events will very, very likely become more common, more frequent, more intense. So what we can say is that these kinds of events that we are seeing are consistent with climate change. "

    Those ideas underscore the findings of a National Research Council Report commissioned by Congress and released earlier this month. Chamedies, vice chairman for the report, says it warns that global warming is real and that action needs to be taken to limit its magnitude and prepare for its impacts.

    "And, we don’t know exactly what is going to happen, but we know that we face risks," he says. "What are we going to do to manage those risks in making decisions that will minimize the likelihood that certain impacts will occur and also providing a sort of resiliency so that we adjust to those impacts if and when they do occur."

    Chamedies says the lesson from the destructive storms in the United States is that, no matter how sophisticated forecasting technology has become, the nation must find ways to reduce its vulnerability to extreme weather events, whether or not they’re caused by climate change.

    You May Like

    Video Democrats Clinton, Kaine Offer 'Very Different Vision' Than Trump

    In a jab at Trump, Clinton says her team wants to 'build bridges, not walls'; Obama Hails Kaine's record; Trump calls Kaine a 'job-killer'

    Turkey Wants Pakistan to Close Down institutions, Businesses Linked to Gulen

    Thousands of Pakistani students are enrolled in Gulen's commercial network of around two dozen institutions operating in Pakistan for over two decades

    AU Passport A Work in Progress

    Who will get the passport and what the benefits are still need to be worked out

    This forum has been closed.
    Comments
         
    There are no comments in this forum. Be first and add one

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    In State of Emergency, Turkey’s Erdogan Focuses on Spiritual Movementi
    X
    July 22, 2016 11:49 AM
    The state of emergency that Turkish President Recep Tayyip Erdogan has declared is giving him even more power to expand a purge that has seen an estimated 60,000 people either arrested or suspended from their jobs. VOA Europe correspondent Luis Ramirez reports from Istanbul.
    Video

    Video In State of Emergency, Turkey’s Erdogan Focuses on Spiritual Movement

    The state of emergency that Turkish President Recep Tayyip Erdogan has declared is giving him even more power to expand a purge that has seen an estimated 60,000 people either arrested or suspended from their jobs. VOA Europe correspondent Luis Ramirez reports from Istanbul.
    Video

    Video Scientists in Poland Race to Save Honeybees

    Honeybees are in danger worldwide. Causes of what's known as colony collapse disorder range from pesticides and loss of habitat to infections. But scientists in Poland say they are on track to finding a cure for one of the diseases. VOA’s George Putic reports.
    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.

    Special Report

    Adrift The Invisible African Diaspora