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Keyword: crown fire

The effects of thinning and similar stand treatments on fire behavior in Western forests.

Publications Posted on: August 01, 2018
In the West, thinning and partial cuttings are being considered for treating millions of forested acres that are overstocked and prone to wildfire. The objectives of these treatments include tree growth redistribution, tree species regulation, timber harvest, wildlife habitat improvement, and wildfire-hazard reduction. Depending on the forest type and its structure, thinning has both positive and negative impacts on crown fire potential.

Forest structure and fire hazard in dry forests of the Western United States

Publications Posted on: August 01, 2018
Fire, in conjunction with landforms and climate, shapes the structure and function of forests throughout the Western United States, where millions of acres of forest lands contain accumulations of flammable fuel that are much higher than historical conditions owing to various forms of fire exclusion.

Mountain pine beetle impacts on fire behavior

Science Spotlights Posted on: October 05, 2015
Beetle-killed trees lose their needles over time, and once all the needles have dropped, crown fire danger largely disappears. However, red-needled trees have lower foliar moisture contents than healthy trees, which leads to increased crown fire potential. This research provides insights into the potential use of fuel treatments in beetle-killed forests, increases firefighter awareness of dangerous situations, and assists managers in identifying areas at high risk for ignition and extreme fire behavior.

Data catalog and scanned images for Anderson and Rothermel early fire behavior experiments

Datasets Posted on: August 27, 2015
This data publication contains scanned photos from pivotal experiments conducted by Richard Rothermel and Hal Anderson at the Missoula Fire Sciences Laboratory from the early 1960s through the mid-1980s. The scans document early research that forms the foundation of fire spread and fire danger models used in the field to this day. It also contains a data catalog and finding aid for the hard copy data and files available for these experiments.

Physiological drivers of the ‘spring dip’ in red pine and jack pine foliar moisture content and its relationship to crown fire in the Great Lakes

Projects Posted on: March 27, 2015
For decades, the cause and timing of a 'spring dip' in foliar moisture content in red and jack pine in the Great Lakes region have been poorly understood. This project studies the drivers of this 'dip' in order to improve wildland firefighter preparedness.

Current status and future needs of the BehavePlus Fire Modeling System

Publications Posted on: March 23, 2015
The BehavePlus Fire Modeling System is among the most widely used systems for wildland fire prediction. It is designed for use in a range of tasks including wildfire behaviour prediction, prescribed fire planning, fire investigation, fuel hazard assessment, fire model understanding, communication and research. BehavePlus is based on mathematical models for fire behaviour, fire effects and fire environment.

Western spruce budworm alters crown fire behavior through reduced canopy density

Projects Posted on: January 22, 2015
In the interior West, western spruce budworm outbreaks often last for decades, but their impact on fire behavior is poorly understood. By isolating the effects of the insect on a single tree and simulating the tree in a three-dimensional fire model, researchers were able to identify precise links between western spruce budworm disturbance and fire behavior changes.

Spruce beetle-induced changes to Engelmann spruce foliage flammability

Publications Posted on: August 28, 2014
Intermountain Engelmann spruce (Picea engelmannii Parry ex Engelm) stands affected by the spruce beetle (Dendroctonus rufipennis Kirby) represent a unique and growing fuel complex.

Influence of bark beetle-caused mortality on fuel loadings and crown fire hazard in southwestern ponderosa pine stands

Publications Posted on: May 03, 2013
Bark beetles (Coleoptera: Scolytinae) are important biotic agents of conifer mortality in forests of western North America (Furniss and Carolin 1977) and play an important role in the disturbance ecology of these ecosystems (Fettig and others 2007). Bark beetle outbreaks affect subsequent fire behavior in part by influencing the spatial distribution and state of fuels [see review by Jenkins and others (2008)].

Short- and long-term effects on fuels, forest structure, and wildfire potential from prescribed fire and resource benefit fire in southwestern forests, USA

Publications Posted on: September 14, 2012
Prescribed and resource benefit fires are used to manage fuels in fire-prone landscapes in the Southwest. These practices, however, typically occur under different conditions, potentially leading to differences in fire behavior and effects.