News / Science & Technology

Extreme Weather Linked to Climate Change

  • Heavy rains in southeastern Brazil caused a dam in the town of Campo de Goytacazes to burst and flood the area, January, 2012. (Melissa Martins Casa Grande)
  • Days of heavy rainfall in what is typically one of the driest months of the year in Australia forced 13,000 people to evacuate their homes, March 2012.
  • Cattle decompose under the Saharan sun outside the town of Ayoun el Atrous in Mauritania. The food and nutrition crisis facing countries in West Africa’s drought-prone Sahel region continued to deteriorate at an alarming rate, May 2012.
  • Two weeks worth of rain fell in one day in Manlia, submerging half of the Philippines capital, July 2012.
  • Extreme drought conditions in the United States sparked more and extensive wild fires, like this one in Missouri’s Mark Twain National Forest, July 2012. (U.S. Forest Service)
  • Corn plants weakened by the drought lie on the ground after being knocked over by rain in Bennington, Nebraska. The U.S. Drought Monitor said the rainfall came too late to help already damaged corn crops, September 2012.
  • Super Typhoon Jelawat made landfall over Japan and affected the Korean peninsula with heavy rains and floods, September 2012.
  • For the third consecutive year, monsoon floods hit Pakistan's Sindh and Balochistan provinces, damaging more than 450,000 hectares of agricultural land. Almost 400,000 houses were partially or completely destroyed, September 2012. (Jean-Luc Siblot)
  • Vast stretches of Nigeria were hit by floods. Flood waters submerge a vehicle in the Patani community in Nigeria's Delta State, October 2012.
  • Wreckage on the coast of New Jersey from Hurricane Sandy, October 2012. (Credit: spleeness)
  • Hurricane Sandy flooded New York City streets, October 2012. (David Shanbone)
  • The United Nations requested $65 million to provide lifesaving aid to survivors of Typhoon Bopha in the Philippines, December 2012. (OCHA)
  • The United Nations Convention on Climate Change met in Qatar in December for annual talks to address the impact of climate change. (UNFCCC)
  • In 2012 polar ice sheets melted at an accelerating rate. In this photo surface melt water rushes along the surface of the Greenland Ice Sheet through a supra-glacial stream channel. (Ian Joughin)
Extreme Weather Events in 2012
Rosanne Skirble
No evidence has linked extreme weather events to climate change, until now. New research suggests devastating floods, droughts and storms were exacerbated by human-induced climate change caused by the burning of fossil fuels in our cars, factories and homes.

The new report, released by British and American climate agencies, analyzes a dozen extreme weather events which occurred worldwide in 2012.

“What they find is [with] about half of the events," said Thomas Karl, director of the NOAA National Climatic Data Center, "the analyses reveal compelling evidence that human-caused change was a factor contributing to the extreme event.”  

The National Oceanic and Atmospheric Administration (NOAA) and Britain’s Met Office Hadley Centre edited the report. Co-editor and NOAA scientist Thomas Peterson says natural weather patterns and human induced climate change are factors in the intensity and evolution of events.

Extreme Weather Linked to Climate Change
Extreme Weather Linked to Climate Changei
|| 0:00:00
...    
🔇
X

While last year’s spring and summer heat waves in the United States are attributed to normal atmospheric dynamics, climate scientists found that is not the entire story.

“They estimated that human caused climate change contributed about one-third of the magnitude of that warmth," Peterson said. "Or in terms of risk, greenhouse warming had already made very large seasonal departures from normal, like the temperatures in the spring in the Eastern U.S. about 12 times more likely to occur.”

The report also blamed human-caused climate change for the warmer ocean and atmosphere that drove the loss of sea ice in the Arctic.

That was not the case with Hurricane Sandy, the devastating storm that hit New Jersey and New York last October. Karl says the rare event might have occurred anyway.

“What the analysis was saying with the added increase of sea level, that just makes that kind of event incrementally worse," Karl said. "And in some of these events that is the kind of result that we are seeing.  However, in a number of these other events we could not detect a human influence.”

High rainfall in Britain, the United States, China and Japan were mainly due to natural variability, while the report detected a warming-climate connection in precipitation in Australia and New Zealand.  

“We are making great strides in our ability to understand these events," Karl said. "We attribute this to increased computational resource [and] improved quality of data sets. With these tools we continue to gain more insights into the many factors that affect the frequency and intensity as well as the spatial and temporal patterns of the extreme events.”  

And, Karl adds, the more accurate information collected by climate scientists can help policy makers and the public better understand and manage the impact of climate change.

You May Like

Philippines, Muslim Rebels Try to Salvage Peace Pact

Peace process faces major setback after botched military operation to find terrorists results in bloody gunbattle between government forces, Moro Islamic Liberation Front fighters More

Republicans Expect Long, Expensive Presidential Battle

Political strategist says eventual winner will be one who can put together strongest coalition of various conservative groups that make up Republican Party More

Video New Wheelchair Is Easier to Use, Increases Mobility

Engineers have come up with a lever-operated design that makes use of easily accessible bicycle technology 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.
Liberia's Almost Last Ebola Patient Grateful but Still Grievingi
X
Benno Muchler
March 26, 2015 3:41 PM
Beatrice Yardolo was to make history as Liberia’s last Ebola patient. Liberians recently started counting down 42 days, the period that has to go by without a single new infection until the World Health Organization can declare a country Ebola-free. That countdown stopped on March 20 when there was another new case of Ebola, making Yardolo’s story a reminder that Ebola is far from over. Benno Muchler reports from Monrovia.
Video

Video Liberia's Almost Last Ebola Patient Grateful but Still Grieving

Beatrice Yardolo was to make history as Liberia’s last Ebola patient. Liberians recently started counting down 42 days, the period that has to go by without a single new infection until the World Health Organization can declare a country Ebola-free. That countdown stopped on March 20 when there was another new case of Ebola, making Yardolo’s story a reminder that Ebola is far from over. Benno Muchler reports from Monrovia.
Video

Video Cambodian Land Grabs Threaten Traditional Communities

Indigenous communities in Cambodia's Ratanakiri province say the government’s economic land concession policy is taking away their land and traditional way of life, making many fear that their identity will soon be lost. Local authorities, though, have denied this is the case. VOA's Say Mony went to investigate and filed this report, narrated by Colin Lovett.
Video

Video US, South Korea Conduct Joint Military Exercises

The Eighth U.S. Army Division and the Eighth Republic of Korea Mechanized Infantry Division put on a well orchestrated show of force for the media this week during their joint military training exercises in South Korea. VOA’s Seoul correspondent Brian Padden was there and reports the soldiers were well disciplined both in conducting a complex live fire exercise and in staying on message with the press.
Video

Video Space Program Status Disappoints 'Last Man on the Moon'

One of the films that drew big crowds last week at the annual South by Southwest festival in Austin, Texas, tells the story of the last human being to stand on the moon, U.S. astronaut Eugene Cernan. It has been 42 years since Cernan returned from the moon and he laments that no one else has gone there since. VOA’s Greg Flakus reports.
Video

Video Young Filmmakers Shine Spotlight on Giving Back

A group of student filmmakers from across the United States joined President Barack Obama at the White House this month for the second annual White House Student Film Festival. Fifteen short films were officially selected from more than 1,500 entries by students aged 6 through 18. The filmmakers and their families then joined the president and a group of celebrities for a screening of their films. VOA’s Julie Taboh reports.
Video

Video VOA Exclusive: Interview with Afghan President Ashraf Ghani

Afghan President Ashraf Ghani, during his first visit as president to Washington, gave a one-on-one interview with VOA Afghan Service reporter Said Suleiman Ashna, about his request for a change in U.S. troop levels, the threat from the Islamic State, and repairing relations with the United States and Pakistan. The interview was held at Blair House, late Sunday, in Pashto.
Video

Video California Science Center Tells Story of Dead Sea Scrolls

The ancient manuscripts were uncovered in the mid-20th century, and they are still yielding clues about life and religious beliefs in ancient Israel. As VOA's Mike O'Sullivan reports, an exhibit in Los Angeles shows how modern science is bringing the history of these ancient documents to life.
Video

Video Angelina Jolie Takes Another Bold Step

Hollywood actress and filmmaker Angelina Jolie has revealed she had her ovaries and fallopian tubes removed to lower her odds of getting cancer. Doctors say the huge publicity over her decision will help raise awareness about the importance of cancer screening. VOA’s George Putic has more

All About America

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