Navigation Links
In the warming West, climate most significant factor in fanning wildfires' flames

The recent increase in area burned by wildfires in the Western United States is a product not of higher temperatures or longer fire seasons alone, but a complex relationship between climate and fuels that varies among different ecosystems, according to a study conducted by U.S. Forest Service and university scientists. The study is the most detailed examination of wildfire in the United States to date and appears in the current issue of the journal Ecological Applications.

"We found that what matters most in accounting for large wildfires in the Western United States is how climate influences the build upor productionand drying of fuels," said Jeremy Littell, a research scientist with the University of Washington's Climate Impacts Group and lead investigator of the study. "Climate affects fuels in different ecosystems differently, meaning that future wildfire size and, likely, severity depends on interactions between climate and fuel availability and production."

To explore climate-fire relationships, the scientists used fire data from 1916 to 2003 for 19 ecosystem types in 11 Western States to construct models of total wildfire area burned. They then compared these fire models with monthly state divisional climate data.

The study confirmed what scientists have long observed: that low precipitation and high temperatures dry out fuels and result in significant fire years, a pattern that dominates the northern and mountainous portions of the West. But it also provided new insight on the relationship between climate and fire, such as Western shrublands' and grasslands' requirement for high precipitation one year followed by dry conditions the next to produce fuels sufficient to result in large wildfires.

The study revealed that climate influences the likelihood of large fires by controlling the drying of existing fuels in forests and the production of fuels in more arid ecosystems. The influence of climate leading up to a fire season depends on whether the ecosystem is more forested or more like a woodland or shrubland.

"These data tell us that the effectiveness of fuel reductions in reducing area burned may vary in different parts of the country," said David L. Peterson, a research biologist with the Forest Service's Pacific Northwest Research Station and one of the study's authors. "With this information, managers can design treatments appropriate for specific climate-fire relationships and prioritize efforts where they can realize the most benefit."

Findings from the study suggest that, as the climate continues to warm, more area can be expected to burn, at least in northern portions of the West, corroborating what researchers have projected in previous studies. In addition, cooler, wetter areas that are relatively fire-free today, such as the west side of the Cascade Range, may be more prone to fire by mid-century if climate projections hold and weather becomes more extreme.


Contact: Yasmeen Sands
USDA Forest Service, Pacific Northwest Research Station

Related biology news :

1. Global warming increasing the dispersal of flora in Northern forests
2. Cantabrian cornice has experienced seven cooling and warming phases over past 41,000 years
3. From alarmed to dismissive: The six ways Americans view global warming
4. Wetlands likely source of methane from ancient warming event
5. Ma and Pa solutions to global warming
6. Fighting global warming offers growth and development opportunities
7. Crickets may predict human survivability during global warming
8. Prominent climate researcher to speak at UH on global warming March 5
9. Decisive action needed as warming predictions worsen, says expert
10. Mass media often failing in its coverage of global warming, says climate researcher
11. Global warming threatens Antarctic sea life
Post Your Comments:
(Date:11/17/2015)... LIVERMORE, Calif. , Nov. 17, 2015  Vigilant ... has joined its Board of Directors. ... Vigilant,s Board after recently retiring from the partnership at ... owning 107 companies with over $140 Billion in revenue.  ... performance improvement across all the TPG companies, from 1997 ...
(Date:11/12/2015)... 12, 2015  A golden retriever that stayed healthy ... (DMD) has provided a new lead for treating this ... Broad Institute of MIT and Harvard and the University ... Cell, pinpoints a protective gene ... disease,s effects. The Boston Children,s lab of Lou ...
(Date:11/11/2015)...   MedNet Solutions , an innovative SaaS-based eClinical technology ... pleased to announce that it will be a Sponsor of ... to be held November 17-19 in Hamburg ... of iMedNet , MedNet,s easy-to-use, proven and ... has been able to deliver time and cost savings of ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... CITY , Nov. 24, 2015 /PRNewswire/ - ... "Company") announced today that the remaining 11,000 post-share ... Share Purchase Warrants (the "Series B Warrants") subject ... were exercised on November 23, 2015, which will ... Shares.  After giving effect to the issuance of ...
(Date:11/24/2015)... ... November 24, 2015 , ... In harsh industrial ... points for in-line sensors can represent a weak spot where leaking process media ... of retractable sensor housings , which are designed to tolerate extreme process conditions. ...
(Date:11/24/2015)... ... November 24, 2015 , ... ... Inc., on being named to Deloitte's 2015 Technology Fast 500 list of the ... manufactures AcceleDent®, a FDA-cleared, Class II medical device that speeds up orthodontic tooth ...
(Date:11/24/2015)... 2015 Capricor Therapeutics, Inc. (NASDAQ: ... discovery, development and commercialization of first-in-class therapeutics, today announced ... is scheduled to present at the 2015 Piper Jaffray ... EST, at The Lotte New York Palace Hotel in ... . --> . ...
Breaking Biology Technology: