Articles tagged with Forest Fires
Researchers found that subalpine forests in the Northern Rockies consistently recovered from wildfires over 4,800 years, with lake sediment cores providing a detailed record of past ecosystem responses. The study suggests that these forests are resilient to fire now, but future climate change may alter this resilience.
A recent study using SENTINEL-2 satellite images estimated burned areas with 96% accuracy, revealing a much larger area affected by wildfires than previously thought. This higher precision will help improve estimates of greenhouse gas emissions and inform fire management decisions.
Uncontrolled wildfires are threatening environmental progress in Brazilian Amazonia, a critical carbon sink. Deforestation rates have fallen, but fire counts remain high, driven by hotter and drier climate conditions.
Research from Colorado State University shows wildfire smoke can attach to home surfaces like carpet and drapes, extending exposure and potentially causing health problems. Simple surface cleaning, such as vacuuming or mopping, can reduce exposure and limit risk.
A new study by UCLA climate scientist Daniel Swain finds that climate change is limiting the use of prescribed fires to prevent wildfires. The research projects a 17% reduction in favorable days across the Western US, with most reductions coming in spring and summer.
Researchers at the University of California, Irvine have found that decades-old remains of large trees are a major contributor to fire severity in California's Sierra Nevada mountains. This discovery could help improve the state's wildfire management efforts through targeted fuel treatments and prescribed burns.
A study suggests that dispersal plays a major role in microbial succession after a fire. Researchers found that the emerging microbial communities in the soil surface changed with the seasons and plant reappearance, driven by dispersal. Dispersal from air contributed significantly to microbes entering the soil surface.
A new study found that over 2 billion people are exposed to potentially health-impacting wildfire smoke each year, with a significant increase in exposure levels over the past decade. The study highlights the severity and scale of landscape fire-sourced air pollution and its impact on public health, particularly in low-income countries.
By 2070, 44.61% of koala habitats in Australia will be highly susceptible to bushfires, up from 39.56% today. Koalas may struggle to survive due to habitat fragmentation and food source vulnerability.
A recent study by the University of Cordoba confirms that controlled burning has minimal short-term effects on soil properties, but can improve fertility and biological properties. Long-term assessments show that alterations are recovering pre-burn values.
Researchers analyzed wildfire data to find that fireworks-caused ignitions are concentrated on tribal lands and in the western U.S., with more ignitions in the week leading up to the 4th of July. The day after the holiday often sees a spike in ignitions, while weekends tend to have fewer wildfires.
A study by Oregon State University found that forest thinning is enhancing native biodiversity and improving the resilience of older trees on federal lands in eastern Oregon. The research, led by James Johnston, involved long-term monitoring and partnerships between OSU, the US Forest Service, and local groups.
Satellite data reveals an increase in nitrogen dioxide levels in remote forest areas of California, attributed to wildfires and soil emissions. The findings suggest a growing concern for air pollution in rural areas, highlighting the need for policy interventions.
A new modeling tool called REBURN can simulate large forest landscapes and wildfire dynamics under different management strategies. The tool shows that setting prescribed burns and allowing smaller wildfires to burn can yield more varied and resilient forests over time.
A Washington State University-led study found that dry lightning can cause wildfires despite up to 7.7 mm of precipitation, posing a risk for responders to detect fires earlier. The research analyzed data on over 4,600 naturally caused fires and found holdover fires, which can smolder for days before exploding into full-blown wildfires.
Researchers are working to understand and predict wildfires' effects on the environment, including their impact on the carbon cycle and biodiversity. Studies have shown that repeated wildfires can accelerate the transition from tree- to shrub-dominated ecosystems, reducing plant diversity.
Scientists found that contemporary fires in dry conifer forests are burning hotter and killing more trees than in previous centuries, due to a lack of low-severity fires. Regular management and prescribed fires can help mitigate this trend and restore resilience to these ecosystems.
Melinda Adams' research highlights the benefits of pyromantic or 'good fire' in reducing environmental dread, fostering control, and promoting carbon storage. Her work, co-authored with Erica Tom and Ron W. Goode, aims to educate students and community members about Indigenous land stewardship and climate solutions.
Research from Cornell University estimates that wildfire smoke can cause between 4,000 and 9,000 premature deaths and cost between $36 to $82 billion per year in the United States. Metropolitan regions near fire sources are likely to experience a large health burden and economic loss.
Dr. Dave E. Calkin has been recognized with the prestigious Ember Award for his contributions to wildland fire science, including developing tools and strategies for risk management and decision-making. His work aims to improve the effectiveness of wildfire management systems, supporting the health of public lands and communities.
Researchers found that controlled burns in key areas of northern California, western Oregon, and eastern Washington could drastically reduce wildfire smoke exposure throughout the entire western U.S. This is due to prevailing winds carrying smoke across the continent and abundant dense vegetation fueling smokey fires.
A new study led by University of Florida forest management researcher Victoria Donovan found that as woody plants like shrubs and trees replace herbaceous plants like grasses, spot fires can occur farther away from the original fire perimeter. This 'woody encroachment' increases the risk of structural damage and firefighter safety.
A new study reveals that Indigenous people in the Amazon Basin are twice as likely to die prematurely from smoke exposure due to wildfires than the broader South American population. Exposure to harmful smoke particles is highest during the dry season, and mortality rates can be up to 6 times that of the general population.
A new online tool predicts the potential abundance of Black-backed Woodpeckers after fire by incorporating pyrodiversity into forest management decisions. This helps balance human and wildlife needs in post-fire landscapes.
Researchers found Mountain Quail were more common than thought, with positive associations to high-severity fires. They were most positively associated with areas that had burned in the past 6-10 years, but also showed positive relationships ranging from 1 to 35 years after fires.
A study found that savanna species in Cerrado biome produce significantly more bark than forest species to protect against frequent fires. This adaptation enables them to survive and regenerate after burning, highlighting the importance of controlled fire management in these ecosystems.
A decade-long study suggests Indigenous-managed forests can absorb up to 26,000 metric tons of dangerous pollutants from wildfires each year, preventing an estimated 15 million cases of respiratory and cardiovascular disease. This absorption saves Amazon cities US$2 billion a year in healthcare costs.
The study reveals that a lack of community involvement and inadequate governance are major contributors to wildfire management in the Amazon region. Local stakeholders identified deficiencies in institutions, staff cuts, and underinvestment as significant vulnerabilities.
Researchers at Queensland University of Technology (QUT) have built and tested a full-scale bushfire safe room that demonstrates excellent heat resistance. The results suggest the shelter could keep people alive for up to two hours in extreme conditions, but further testing is needed to confirm human survivability.
Lehigh researchers develop new method to predict wildfires by analyzing power system ignition risk, considering mechanical behavior of conductor cables under strong winds. The study finds that encroachment probability is highly sensitive to vegetation clearance and wind intensity, providing valuable insights for decision makers and pol...
Research suggests that wildfires need to fall within a narrow severity range to improve forest health. The study found that moderate severity fires are most effective at reducing community and ecosystem risk, but even these may not be enough to restore species composition. Land managers can use the predicted post-fire conditions to inf...
Warmer and drier climate conditions are making it less likely for trees to regenerate after wildfires, according to new research published in PNAS. Ecological forest management can partially offset climate-driven declines in tree regeneration by limiting fire-caused tree death, but only if action is taken quickly.
A Stanford-led study estimates that about 20% of all Sierra Nevada conifer forests are mismatched with the climate around them. This means they are temporarily surviving in habitats that have grown too warm for them, but are likely to be replaced by tree species better adapted to the climate after catastrophic wildfires.
A new technique maps the effects of fire-induced permafrost thaw in Alaska, revealing widespread topographic change and vegetation shifts. The study used a machine learning-based approach to quantify thaw settlement across 3 million acres of land, with results showing a significant loss of evergreen forest and shrubland encroachment.
A study published in Nature Ecology & Evolution found over 74,000 active fires in the Brazilian Amazon during the period, mainly due to recent deforestation. The research also revealed a sharp increase in forest fires on public lands and areas of Indigenous reservations.
Researchers discovered that certain microorganisms dominate burned soil after a wildfire, with some species increasing in abundance and others consuming charcoal. This finding could help revive megafire dead zones and provide insights into the human microbiome's response to stress.
A new study shows that midwinter dry spells accelerate snowmelt in burned areas, as wildfires increase sun exposure and reduce the snowpack's ability to reflect sunlight. This can lead to earlier snowmelt, affecting water availability and forecasting, with cascading impacts on hydrology.
A new framework incorporates plant physiology into fine-scale computer models of wildland fire, improving global fire forecasting. Plants' water and carbon dynamics influence combustion and heat transfer, affecting fire behavior and effects.
A recent study reveals that high-severity wildfires are increasing in Sierra Nevada and Southern Cascade forests, with the average annual area burned at high severity nearly quintupled since before Euro-American settlement. This trend is concerning as most affected forest types are adapted to low-to-moderate severity burning.
A new study reveals that re-burns in the western US, particularly in California, are fueled by climate change, seasonal factors, and human activity. Understanding these drivers can help land managers develop more effective fire management strategies, including prescribed burns and forest thinning.
A European consortium has successfully guided lightning using a high-power laser installed at the top of Mount Säntis in Switzerland, increasing the radius of protection from 120m to 180m. The Laser Lightning Rod (LLR) works even in poor weather conditions, such as fog.
A study found bird diversity and abundance increased in areas with high-severity burns, but some species showed lower abundance. The findings suggest that managing forests to promote shrubland bird species could be beneficial. Researchers hope the results can inform forest management strategies to benefit birds.
Researchers found that oscillations between extreme wetness and aridity in California were closely linked with wildfires during the 8.2-kiloyear event. The study suggests that hydroclimate fluctuations will become more common due to global warming, leading to an increase in wildfire activity.
A new study suggests that Native American tribes once used controlled burns to weaken climate's impact on wildfires. For roughly 400 years, cultural burning practices appear to have broken the link between climate conditions and fire activity in the southwestern United States. This ancient approach may hold lessons for modern wildfire ...
Scientists developed a first model to predict canopy water content during drought and heat waves. The model could enable fire danger forecasting models that include vegetation in their calculations, making it easier to predict the spread of fires.
Researchers used social media data to hindcast recreation visits before and after the fire, creating a complete picture of visitation changes. The approach holds promise for large, multi-ownership landscapes with inconsistent monitoring practices.
New research shows a strong link between atmospheric dryness and forest fire risk, with warmer temperatures increasing the drying power of fuels. The study found that over 30 million records of fire activity in the last 20 years reveal a predictable relationship between vapour pressure deficit and fire activity.
A recent study analyzing Amazon Rainforest fires from 2003-2020 reveals that most fires are caused by uncontrolled human use of fire for agriculture and deforestation. The study found that Brazil accounted for an average of 73% of detected fires, with pasturelands and natural grasslands being the main burned areas.
A new Concordia University study reveals that extreme weather events, such as hurricanes and heatwaves, have failed to drive government climate action. Despite the devastating economic and human costs of these disasters, governments have remained slow to enact meaningful reforms.
A team of CSU researchers has designed a model that can predict which buildings will survive a wildfire, allowing for more effective fire mitigation strategies. By analyzing community networks and incorporating graph theory, the model achieves accuracy rates of up to 86% in predicting building survival.
Researchers suggest that prescribed fire can help restore forest habitats less favorable to disease-carrying ticks, reducing their populations. Fire-driven forest modification can also suppress tick abundance and pathogen transmission by creating drier conditions and increasing wildlife predators of ticks.
Researchers studied post-wildfire regeneration in the northern Rocky Mountains, discovering that cool and moist conditions promote seedling growth. Burned trees provide vital functions, including shade and attracting woodpeckers, while seeds can survive even if the tree dies.
A new study reveals that western wildfires can strengthen storms in central US states, leading to heavier rain and flash flooding. The heat and airborne particles from wildfires intensify severe storms, with some cases bringing hailstones larger than baseballs.
Researchers study links between cyclones and forest fires, finding that cyclones can create conditions ripe for fires by damaging trees and altering microclimates. As climate change increases cyclone intensity, the risk of wildfires in previously fire-resistant ecosystems like rainforests grows.
A study by Oregon State University found that warmer stream temperatures in a burned-over watershed did not result in fewer trout. The researchers discovered that steelhead, cutthroat, and rainbow trout were resilient to the increased temperatures, which rose above 22 degrees Celsius during summer 2021. However, more research is needed...
A new resilience sensing system can identify areas in danger of collapse and measure the success of conservation efforts. Global average resilience has declined over the last 20 years, with regions such as the Amazon rainforest showing signs of loss of resilience.
A study reveals a significant increase in fire risk in Southern, Central, and Northern Europe, particularly in the Mediterranean region, linked to climate change. The increased fire risk threatens key carbon sinks like the Pyrenees and Alps, highlighting the need for effective forest management strategies.
New research highlights how climate change enhances wildfire risk globally, but human actions and policies can mitigate regional impacts. The study assesses 500 previous papers and examines future fire weather trends to provide insight into the success or failure of climate policies.
Researchers examine historical data and weather patterns to understand west-side wildfires' timing, size, and causes. They find that severe fires are normal for the region when looking at longer time scales, and conventional fire management tools may be less effective due to extreme winds.
Researchers at North Carolina State University designed new fire shelter prototypes to protect firefighters trapped in wildfires. The shelters showed improved thermal performance and longer survival times compared to the current industry standard, with temperatures remaining within survival limits for up to 60 seconds.