News / Science & Technology

Scientists Identify Way to Predict Heat Waves

Roofers take their lunch break in the shade of a tree in rural Ashland, Nebraska, Aug. 27, 2013, as a late summer heat wave sends temperatures into the high 90s.
Roofers take their lunch break in the shade of a tree in rural Ashland, Nebraska, Aug. 27, 2013, as a late summer heat wave sends temperatures into the high 90s.
Rosanne Skirble
Days of unrelenting high temperatures are the most deadly weather phenomenon on Earth, but like other extreme weather events, they are difficult to predict.

Across Europe in 2003, heat waves were blamed for 50,000 deaths. Six hundred lives were lost in California in 2006 because of the scorching temperatures.

Now scientists have identified a weather pattern in the atmosphere that may help meteorologists predict heat waves and, as a result, save lives.

Heat wave precursor

While prior studies have focused on land or sea surface conditions to try to identify patterns that precede heat waves, climate scientist Haiyan Teng turned her attention to the atmosphere.
This image shows the differences in day time land surface temperatures collected in July 2001 and during the 2003 heat wave by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. (NASA/Reto Stockli and Robert Simmon, basedThis image shows the differences in day time land surface temperatures collected in July 2001 and during the 2003 heat wave by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. (NASA/Reto Stockli and Robert Simmon, based
x
This image shows the differences in day time land surface temperatures collected in July 2001 and during the 2003 heat wave by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. (NASA/Reto Stockli and Robert Simmon, based
This image shows the differences in day time land surface temperatures collected in July 2001 and during the 2003 heat wave by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. (NASA/Reto Stockli and Robert Simmon, based
She and colleagues at the National Center for Atmospheric Research in Boulder, Colorado, ran a 12,000-year computer simulation over the northern hemisphere.

"Instead of just 20 or 30 from the last 50 years of observations, we’ve got 6,000 extreme heat wave events," she said. "This gives us enough samples to study the precursor circulation patterns for these heat waves.”

Teng says the computer model identified a pattern that showed up before the temperature rose. It is characterized by a sequence of alternating high and low pressure systems - five of each - circling the northern latitudes.

“It’s high above the atmosphere in the upper troposphere and this pattern [precedes] the U.S. heat waves by two weeks,” she said.

Making the connection

While the pattern is well documented in the historic record, this is the first time it has been connected to extreme heat waves. When the scientists reviewed real heat waves in the United States dating back to 1948, a similar pattern often emerged.

“We think, ok, this pattern is a pattern in nature, and it is useful for the heat wave probability forecast. It is an estimate of the probability, not exactly how warm the temperature is going to be," Teng said.
Scientists Identify Way to Predict Heat Waves
Scientists Identify Way to Predict Heat Wavesi
|| 0:00:00
...    
🔇
X

The wave pattern Teng describes in the journal Nature Geoscience is global in scale and has implications beyond the Northern Hemisphere.

While more research needs to be done to confirm the findings, Teng says her team will continue their search for other circulation and environmental factors that foreshadow extreme weather.

You May Like

Video Snowstorm Sweeps Northeastern US

'This is nothing like we feared it would be,' New York City Mayor Bill de Blasio says; he had warned storm could be one of worst in city history More

Millions of Displaced Nigerians Struggle With Daily Existence

Government acknowledges over a million people displaced in 2014 due to fight against Boko Haram insurgency More

Facebook: Internal Error to Blame for Outages

Temporary outage appeared to spill over and temporarily slow or block traffic to other major Internet sites More

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.
Obama Urges Closer Economic Ties During Historic India Visiti
X
Aru Pande
January 26, 2015 9:33 PM
U.S. President Barack Obama says the United States and India must do better to capitalize on untapped potential in their economic relationship - by removing some of the roadblocks to greater trade and investment. As VOA correspondent Aru Pande reports from New Delhi, Obama spoke after participating in India’s Republic Day celebration.
Video

Video Obama Urges Closer Economic Ties During Historic India Visit

U.S. President Barack Obama says the United States and India must do better to capitalize on untapped potential in their economic relationship - by removing some of the roadblocks to greater trade and investment. As VOA correspondent Aru Pande reports from New Delhi, Obama spoke after participating in India’s Republic Day celebration.
Video

Video US, EU Threaten New Russia Sanctions Over Ukraine

U.S. President Barack Obama has blamed Russia for an attack by Ukrainian separatists that left dozens dead in the port of Mariupol and cast further doubt on the viability of last year’s cease-fire with the Kyiv government. VOA’s Michael Bowman reports from Washington.
Video

Video White House Grapples With Yemen Counterterrorism Strategy

Reports say the U.S. has carried out a drone strike on suspected militants in Yemen, the first after President Barack Obama offered reassurances the U.S. is continuing its counterterrorism operations in the country. The future of those operations has been in question following the collapse last week of Yemen’s government. VOA White House correspondent Luis Ramirez reports.
Video

Video Kerry Warns Against Violence in Nigeria Election

US Secretary of State John Kerry visited Nigeria Sunday in a show of the level of concern within the U.S. and the international community over next month’s presidential election. Chris Stein reports.
Video

Video Zoo Animals Show Their Artistic Sides

The pursuit of happiness is so important, America's founding fathers put it in the Declaration of Independence. Any zookeeper will tell you animals need enrichment, just like humans do. So painting, and even music, are part of the Smithsonian National Zoo's program to keep the animals happy. VOA’s June Soh met some animal artists at the zoo in Washington. Faith Lapidus narrates.
Video

Video Worldwide Photo Workshops Empower Youth

Last September, 20 young adults from South Sudan took part in a National Geographic Photo Camp. They are among hundreds of students from around the world who have learned how to use a camera to tell the stories of the people in their communities through the powerful medium of photography. Three camp participants talked about their experiences recently on a visit to Washington. VOA’s Julie Taboh reports.
Video

Video Saudi, Yemen Developments Are Sudden Complications for Obama

The death of Saudi Arabia's King Abdullah and the collapse of Yemen’s government have cast further uncertainty on U.S. efforts to fight militants in the Middle East and also contain Iran’s influence in the region. VOA White House correspondent Luis Ramirez reports on the new complications facing the Obama administration and its Middle East policy.
Video

Video Progress, Some Areas of Disagreement in Cuba Talks

U.S. and Cuban officials are reporting progress from initial talks in Havana on re-establishing diplomatic ties. U.S. Assistant Secretary of State (for Western Hemisphere Affairs) Roberta Jacobson said while there was agreement on a broad range of issues, there also are some “profound disagreements” between Washington and Havana. VOA State Department correspondent Pam Dockins has the story.
Video

Video US, Japan Offer Lessons as Eurozone Launches Huge Stimulus

The Euro currency has fallen sharply after the European Central Bank announced a bigger-than-expected $67 billion-a-month quantitative easing program Thursday - commonly seen as a form of printing new money. Henry Ridgwell reports for VOA from London on whether the move might rescue the eurozone economy -- and what lessons have been learned from similar programs around the world.
Video

Video Nigerian Elections Pose Concern of Potential Conflict in 'Middle Belt'

Nigeria’s north-central state of Kaduna has long been the site of fighting between Muslims and Christians as well as between people of different ethnic groups. As the February elections approach, community and religious leaders are making plans they hope will keep the streets calm after results are announced. Chris Stein reports from the state capital, Kaduna.
Video

Video As Viewership Drops, Obama Puts His Message on YouTube

Ratings reports show President Obama’s State of the Union address this week drew the lowest number of viewers for this annual speech in 15 years. White House officials anticipated this, and the president has decided to take a non-traditional approach to getting his message out. VOA White House correspondent Luis Ramirez reports.
Video

Video S. Korean Businesses Want to End Trade Restrictions With North

Business leaders in South Korea are calling for President Park Geun-hye to ease trade restrictions with North Korea that were put in place in 2010 after the sinking of a South Korean warship.Pro-business groups argue that expanding trade and investment is not only good for business, it is also good for long-term regional peace and security. VOA’s Brian Padden reports.

Circumventing Censorship

An Internet Primer for Healthy Web Habits

As surveillance and censoring technologies advance, so, too, do new tools for your computer or mobile device that help protect your privacy and break through Internet censorship.
More

All About America

AppleAndroid