News / Science & Technology

Study: Warmer Planet Fuels More Wildfires

This August 30, 2013, image provided by the U.S. Forest Service, shows a member of the BLM Silver State Hotshot crew using a drip torch to set back fires on the southern flank of the Rim Fire in California.
This August 30, 2013, image provided by the U.S. Forest Service, shows a member of the BLM Silver State Hotshot crew using a drip torch to set back fires on the southern flank of the Rim Fire in California.
Rosanne Skirble
A warmer planet is helping to fuel more wildfires in the United States, according to a new study.

Environmental scientists at Harvard University predict that by 2050, wildfire seasons will be three weeks longer, up to twice as smoky, and will burn a wider area in the western part of the country.    
    
Fires in the Western United States have gotten worse since the 1970s. Scientists at Harvard University School of Engineering and Applied Sciences looked at past weather conditions and wildfires to find out why.
 
“In some regions, like the Rocky Mountains, really temperature is the driving force, but elsewhere variables like relative humidity can play a role," said Loretta Mickley, an atmospheric chemist and co-author of the study. "If one year is particularly moist, for example, in the Great Basin, Nevada, Utah area, then that will foster a lot of vegetation growth and then the following year all that vegetation can feed wildfires and their spread.”

LISTEN: Study: Warmer Planet Fuels More Wildfires
Study: Warmer Planet Fuels More Wildfires i
|| 0:00:00
...
 
🔇
X

The scientists then turned to a suite of 15 climate models based on the conclusions of the Intergovernmental Panel on Climate Change, the leading international body for the assessment of global warming. On average, the models predicted increases between 2 and 2.5 degrees Celsius by 2050.

“The finding for rainfall, which can diminish fire activity, and for relative humidity, we found only small changes, with some models predicting small increases and some models predicting small decreases in those variables," Mickley said. "So we found as in the past, temperature is really driving the changes that we predict for the future.”  

The calculations suggest the probability of large wildfires would increase by factors of two or three, and that by 2050, the more than four-month fire season would be three weeks longer.  

“If we just look at one month in the future for example, the area burned in the very forested Rockies could quadruple," Mickley said. "If we look at the whole fire season, we see increases more on the order of say 20 or 30 percent to 100 percent.”

While air quality in the United States has greatly improved in recent decades in response to federal laws, Mickley says air pollution is an unexpected consequence of longer lasting, widespread wildfires.     

“These increases in wildfires could totally disrupt our efforts to clean the air," she said. "Last weekend, there was an area the size of some states in the eastern U.S. blanketed with unhealthy air over California and Nevada. And we call this increase in smoke an important climate penalty on air quality.”  

That penalty would be air that is twice as smoky as it is today.  These findings, Mickley says, underscore the need for better forest management.  But also she adds, they send a signal to policy makers and the public to reduce fossil fuel emissions that are warming the planet.

You May Like

UN: 1 Million Somalis at Risk of Hunger

Group warns region is in dire need of humanitarian aid, with at least 200,000 children under age of five acutely malnourished as drought hits southern, central part of nation More

Human Rights Groups Allege Supression of Freedoms in Thailand

Thailand’s military, police have suppressed release of independent report assessing human rights in kingdom during first 100 days of latest coup More

Jennifer Lawrence Contacts FBI After Nude Photos Hacked

'Silver Linings Playbook' actress' photos were posted on image-sharing forum 4chan; Federal Bureau of Investigations is looking into matter 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.
Ukraine Schools Resume Classes, Donate to Government Forcesi
X
September 02, 2014 12:58 PM
A new school year has started in Ukraine but thousands of children in the war-torn east are unable to attend because of ongoing clashes with pro-Russia rebels. In Ukraine's capital, patriotic education has become the norm along with donations to support injured security forces fighting to take back rebel-held areas. VOA's Daniel Schearf reports from Kyiv.
Video

Video Ukraine Schools Resume Classes, Donate to Government Forces

A new school year has started in Ukraine but thousands of children in the war-torn east are unable to attend because of ongoing clashes with pro-Russia rebels. In Ukraine's capital, patriotic education has become the norm along with donations to support injured security forces fighting to take back rebel-held areas. VOA's Daniel Schearf reports from Kyiv.
Video

Video US Detainees Want Negotiators for Freedom in North Korea

The three U.S. detainees held in North Korea were permitted to speak with foreign media Monday. The government of Kim Jong Un restricted the topics of the questions, and the interviews in Pyongyang were limited to five minutes. Each of the men asked Washington to send a representative to Pyongyang to secure his release. VOA’s Carolyn Presutti has our story.
Video

Video Internet, Technology Offer New Tools for Journalists

The Internet and rapidly evolving technology is quickly changing how people receive news and how journalists deliver it. There are now more ways to tell a story than ever before. One school in Los Angeles is teaching the next generation of journalists with the help of a state-of-the-art newsroom. Elizabeth Lee has this report.
Video

Video Turkmen From Amerli Describe Survival of IS Siege

Over the past few weeks, hundreds of Shi'ite Turkmen have fled the town of Amerli seeking refuge in the northern city of Kirkuk. Despite recent military gains after U.S. airstrikes that were coordinated with Iraqi and Kurdish forces, the situation remains dire for Amerli’s residents. Sebastian Meyer went to Kirkuk for VOA to speak to those who managed to escape.
Video

Video West Africa Ebola Vaccine Trials Possible by Early 2015

A U.S. health agency is speeding up clinical trials of a possible vaccine against the deadly Ebola virus that so far has killed more than 1,500 people in West Africa. If successful, the next step would be a larger trial in countries where the outbreak is occurring. VOA's Carol Pearson has more.
Video

Video Survivors Commemorate 70th Anniversary of Nazi Liquidation of Jewish Ghetto

When the German Nazi army occupied the Polish city of Lodz in 1939, it marked the beginning of a long nightmare for the Jewish community that once made up one third of the population. Roughly 200,000 people were forced into the Lodz Ghetto. Less than 7,000 survived. As VOA’s Kane Farabaugh reports, some survivors gathered at the Union League Club in Chicago on the 70th anniversary of the liquidation of the Lodz Ghetto to remember those who suffered at the hands of the Nazi regime.
Video

Video Cost to Raise Child in US Continues to Rise

The cost of raising a child in the United States continues to rise. In its latest annual report, the U.S. Department of Agriculture says middle income families with a child born in 2013 can expect to spend more than $240,000 before that child turns 18. And sending that child to college more than doubles that amount. VOA’s Deborah Block visited with a couple with one child in Alexandria, Virginia, to learn if the report reflects their lifestyle.
Video

Video Chaotic Afghan Vote Recount Threatens Nation’s Future

Afghanistan’s troubled presidential election continues to be rocked by turmoil as an audit of the ballots drags on. The U.N. says the recount will not be completed before September 10. Observers say repeated disputes and delays are threatening the orderly transfer of power and could have dangerous consequences. VOA correspondent Meredith Buel reports.

AppleAndroid