Climate Change Makes It Difficult to Fight Fires With Controlled Burns


It’s more than a month and a half until summer, but massive forest fires They’ve already consumed the landscapes and dark skies in Arizona, New Mexico, and Nebraska. Whipping winds threw flames across the land around Boulder, Colo. December and March.

In Boulder, wildfire concerns intensified in August and late summer when lightning strikes could ignite the timbers. “Now the focus is on each month,” said John Potter, deputy director of the city’s Open Space and Mountain Parks department.

As deadly wildfires become a dire fixture of life for many Americans, much of the country is adopting an ancient tool to limit the destruction: careful, controlled burns that clear vegetation and help prevent wildfires from turning into disasters. But the changing climate in many places makes performing intentional burns much more complicated.

The United States Forest Service used a projected fire on a record 1.8 million acres of federal land last year, and the agency aims to treat an additional fire. 50 million acres with fire and mechanical brush thinning over the next decade. President Biden’s infrastructure law spends $5 billion to reduce combustible vegetation and combat wildfires in other ways. California, Oregon, and other states are exploring legislative changes to encourage more burning.

with human-induced global warming. heating and drying However, in most of the country forest fire seasons taller, narrowing the windows to safely carry out controlled fires. Changing rain and wind patterns add to complications for burners. In many states, efforts to set more land on fire also face bureaucratic hurdles, funding and staff shortages.

So far, this spring, exceptionally dry and windy conditions have prevented Boulder’s mountain parks division from performing any major burns, Mr. Potter said. That raises a lot of concern about how bad the wildfires could be this summer.

“Fingers crossed,” he said.

Even in humid Florida, changing conditions are forcing land managers to get creative with when they burn, said J. Morgan Varner, director of fire research at the Tall Timbers Research Station and Land Conservancy in Tallahassee. Heavy rains often derailed plans in March, the prime season for burning in the state. Dr. “We’re dealing with a really dynamic climate that makes planning difficult,” Varner said.

For most of the last century, America’s approach to fires was to put out any of the fires. A series of devastating flames in 1910 hardened the government’s belief that fire was the enemy. Native land management practices were dismissed as pseudoscience; deliberate burning was considered the behavior of wood arsonists and ill-wishers.

But the brutal hells of recent years have highlighted the need for a better way. Scientists now believe that a prolonged focus on firefighting has overcrowded and overgrown the country’s forests – one reason why today’s wildfires are so devastating.

Between 2005 and 2019, major fires in the West and Great Plains burned the total area nearly four times more each year, and occurred almost twice as often as in the last two decades of the 20th century. a new study found. Since 1979, nearly every part of the world where wildfires have been a problem has experienced extreme heat and drought. other recent research has shown.

The winter rainy season in California is getting shorter but more intense, scientists say. This gives grasses and brushes more time to dry out and become flammable in the fall, while providing them with plenty of water to grow the following spring – a double blow for wildfire risk.

“I don’t think people realize we’re at a point where we can’t actually put out some of these fires,” said Lenya N. Quinn-Davidson, fire consultant and director at the University of California Cooperative Extension. Northern California Prescription Fire Council. “We really need to think in different ways about how we do things.”

Changes are underway in some states. California passed a law last year that allows land managers to avoid firefighting costs should a properly planned fire go awry. Oregon wants to do something similar. The California legislature is considering creating a $20 million fund to compensate homeowners for losses caused by projected burns.

Oregon in 2019 changed air quality rules allowing more fires near towns and communities. Mr. Potter said Boulder’s mountain parks department is investigating whether it should work with Colorado officials to re-examine air quality constrictions. The trade-off, of course, might be to suffocate residents’ lungs with more smoke.

“There’s still sometimes a lack of understanding that a little smoke right now can save us from a lot of smoke later on,” said Jessica E. Halofsky, director of Forest Service’s Northwest Climate Center in Olympia, Wash.

Only a small fraction of predicted fires get out of control and cause injury or damage to homes. But when they do, they can leave a long-lasting distrust.

In Bastrop County, Texas, high winds turned a predicted fire in January into one that took about a week to get under control. A independent investigation He later discovered that while the conditions of the day met the standards for a technically safe burn, the government did not have enough personnel in the field and a bulldozer for the unexpected.

The event brought back memories. Forest fire The one that pierced through the same area in 2011, destroying 1,600 homes and killing several people.

“People who have been here since 2011 are always nervous,” said Roxanne Hernandez, a Bastrop County resident. After the 2011 fire, Ms. Hernandez completed a training program in the prescribed fire and began doing burns on her 53-acre farm. But for the other residents, “Bear came back to Smokey: ‘Turn him out!’ And that’s not the answer.”

Foresters say crews and managers trained in prescription fire are inadequate in many places. Many of these same people are also being called upon to help put out forest fires.

“The longer the wildfire seasons, the longer these people disappeared,” said Dan Porter, director of the forest program in California at The Nature Conservancy, an environmental nonprofit. “When they come back, they’re like, ‘Hey, you want to have a prescription fire?’ we can say. They’ve been crossing the line for four months and breathing smoke for four months. They need to see their families and take a break.”

Ms. Quinn-Davidson of the University of California Cooperative Extension hosted the courses as part of a program. new program educating more people to manage projected fires in their communities. But while most of California’s catastrophic wildfires occur on federal lands, only larger policy changes and large-scale projected fire projects can prevent further damage to the wider landscape, he said.

Last summer, Forest Service chief Randy Moore restricted projected fire use on agency lands to ensure resources are available to fight wildfires. He also ordered a pause from allowing country fires to burn if they provide ecological benefits and do not threaten homes or infrastructure.

The halt was temporary, but enough for some ecologists to fear authorities could still reverse recent fire advocacy. The scale of the task is staggering if the goal is to return the land to an earlier ecological state where frequent natural fires keep the forests alive and resilient.

California aiming at Using projected fire on 300,000 acres of land per year by 2025. much more the state burned down year after year in past centuries, before dense modern settlements transformed the landscape, scientists predicted. Smoke and haze polluted the sky throughout the summer and autumn.

It may not be practical or desirable to go back to that world completely. Still, societies will need to learn to accept fire in one way or another, as more human activity spreads to the once-into-the-wild wilderness, said Heath D. Starns, a fire researcher at Texas A&M University and president of the Texas Prescribed Burn Alliance.

Dr. “It’s a process that really has to happen ecologically,” Starns said. “And our best bet is to live with it, but to determine when, where, and under what conditions fires will occur.”



Source link

Leave a Reply

Your email address will not be published.