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Displaying 141 - 160 of 5651

Fire regimes in sagebrush (Artemisia spp.) ecosystems have been greatly altered across the western United States. Broad-scale invasion of non-native annual grasses, climate change, and human activities have accelerated wildfire cycles, increased…
Author(s): Michele R. Crist, Rick Belger, Kirk W. Davies, Dawn Davis, James R. Meldrum, Douglas J. Shinneman, Thomas E. Remington, Justin L. Welty, Kenneth E. Mayer
Year Published:

Background: Previously established correlations of flame length L with fireline intensity IB are based on theory and data which showed that flame zone depth D of a line fire could be neglected if L was much greater than D. Aims: We evaluated this…
Author(s): Mark A. Finney, Torben Grumstrup
Year Published:

The surface fire spread involved slope and wind effects are significantly important in wildland fires, while very limited attention has been paid on the heat transfer mechanism, especially for different fire line conditions. This work experimentally…
Author(s): Hanwen Guo, Dong Xiang, Yunji Gao, Yuchun Zhang
Year Published:

An experimental study at a laboratory scale that aims to compare the fire behaviour in two configurations: a regular flat slope and a slope with an embedded canyon. In configurations of slope with an embedded canyon, a rapid increase in the rate of…
Author(s): André Rodrigues, Domingos Xavier Viegas, Miguel Almeida, Carlos Ribeiro, Jorge R. Raposo, Jorge André
Year Published:

Background: Historically, reburn dynamics from cultural and lightning ignitions were central to the ecology of fire in the western United States (wUS), whereby past fire effects limited future fire growth and severity. Over millennia, reburns…
Author(s): Susan J. Prichard, R. Brion Salter, Paul F. Hessburg, Nicholas A. Povak, Robert W. Gray
Year Published:

Despite recent research, a systematic approach to understanding wildfire governance is lacking. This article addresses this deficit by systematically reviewing governance theories and concepts applied so far in the academic literature on wildfires…
Author(s): Judith Kirschner, Julian Clark, George Boustras
Year Published:

Safety-specific passive leadership has been negatively linked to diminished safety outcomes, including safety behaviors. However, this relationship is not fully understood. Research has not fully examined mediating factors that may be influenced by…
Author(s): Todd D. Smith, Mari-Amanda Dyal, David M. DeJoy
Year Published:

A new fire danger index is proposed to overcome one of the most important limitations of current fire danger metrics. The fire occurrence probability index (FOPI) combines the Canadian fire weather index (FWI) with remote observations of vegetation…
Author(s): Francesca Di Giuseppe
Year Published:

As a general disturbance in terrestrial ecosystems, fire can have far-reaching consequences on the carbon (C) cycle. Although soil respiration (SR) is important in regulating atmospheric CO2 concentrations, a general pattern of the response of SR to…
Author(s): Haoran Gui, Jiali Wang, Mengjun Hu, Zhenxing Zhou, Shiqiang Wan
Year Published:

Background: Reliable wildfire prediction and efficient controlled burns require a comprehensive understanding of physical mechanisms controlling fire spread behaviour. Earlier studies explored the intermittent nature of free-burning fires, but the…
Author(s): Abhinandan Singh, Reza M. Ziazi, Albert Simeoni
Year Published:

Wildfires affect countries worldwide as global warming increases the probability of their appearance. Monitoring vast areas of forests can be challenging due to the lack of resources and information. Additionally, early detection of wildfires can be…
Author(s): Georgios Tzoumas, Lenka Pitonakova, Lucio Salinas, Charles Scales, Thomas Richardson
Year Published:

The historical role of fire in sagebrush (Artemisia tridentata) landscapes remains poorly understood, yet is important to inform management and conservation of obligate species such as the threatened Gunnison Sage-grouse (GUSG; Centrocercus minimus…
Author(s): Petar Z. Simic, Jonathan D. Coop, Ellis Q. Margolis, Jessica R. Young, Manuel K. Lopez
Year Published:

Increases in burned forest area across the western United States and southwestern Canada over the last several decades have been partially driven by a rise in vapor pressure deficit (VPD), a measure of the atmosphere's drying power that is…
Author(s): Kristina A. Dahl, John T. Abatzoglou, Carly A. Phillips, J. Pablo Ortiz-Partida, Rachel Licker, L. Delta Merner, Brenda Ekwurzel
Year Published:

Wildfire has been shown to increase, decrease, or have no detectable effect on actual evapotranspiration (ETa) fluxes in the western United States. Where disturbance-induced shifts are significant, source-water hydrology may be impacted as ETa…
Author(s): Natalie M. Collar, Brian A. Ebel, Samuel Saxe, Ashley J. Rust, Terri S. Hogue
Year Published:

Background: Further understanding of the effect of fuel structure on underlying physical phenomena controlling flame spread is required given the lack of a coherent porous flame spread theory. Aims: To systematically investigate the effect of fuel…
Author(s): Zakary Campbell-Lochrie, Carlos Walker-Ravena, Michael R. Gallagher, Nick Skowronski, Eric Mueller, Rory Hadden
Year Published:

Background: The models currently used to predict post-fire soil erosion risks are limited by high data demands and long computation times. An alternative is to map the potential hydrological and sediment connectivity using indices to express the…
Author(s): Joana Parente, João Pedro Nunes, J. E. M. Baartman, Dante Follmi
Year Published:

As 21st-century climate and disturbance dynamics depart from historical baselines, ecosystem resilience is uncertain. Multiple drivers are changing simultaneously, and interactions among drivers could amplify ecosystem vulnerability to change.…
Author(s): Kristin H. Braziunas, Nathan G. Kiel, Monica G. Turner
Year Published:

The Rothermel model, which has been widely used to predict the rate of forest fire spread, has errors that restrict its ability to reflect the actual rate of spread (ROS). In this study, the fuels from seven typical tree species in the Karst…
Author(s): Yunlin Zhang, Lingling Tian
Year Published:

Ambient wildfire smoke in the American West has worsened considerably in recent decades, while the number of individuals recreating outdoors has simultaneously surged. Wildfire smoke poses a serious risk to human health, especially during long…
Author(s): Matthew Clark, Alexander Killion, Matthew A. Williamson, Vicken Hillis
Year Published:

With wildfires reaching unprecedented levels of severity, size and frequency, their impact on soil microbial communities is an important concern. Commencing just weeks following a wildfire in a Douglas-fir-Ponderosa pine forest, we collected surface…
Author(s): Erica E. Packard, Daniel M. Durall, Melanie D. Jones
Year Published: