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Ecosystem

Displaying 1081 - 1100 of 6073 results

Air pollution, particularly fine and ultrafine particulate matter aerosols, underlies a wide range of communicable and non-communicable disease affecting many systems including the cardiopulmonary and immune systems, and arises primarily from…
Author(s): Ira Leifer, Michael T. Kleinman, Donald R. Blake, David Tratt, Charlotte Marston
Year Published:

Strong and variable winds in thunderstorm outflow boundaries interact with wildland fires, often spreading flames faster to threaten firefighter safety and amplify economical destruction. These boundaries are difficult to detect in complex terrain…
Author(s): Katja Friedrich, Julie Lundquist
Year Published:

Fire frequency and severity in southern California and across the western United States is increasing, posing a concern to the safety and well-being of communities and ecosystems. Increased aridity coupled with water stressed vegetation from…
Author(s): Alicia M. Kinoshita, Brenton A. Wilder
Year Published:

Numerous studies have linked outdoor levels of PM2.5, PM10, NO2, O3, SO2, and other air pollutants to significantly higher rates of Covid 19 morbidity and mortality, although the rate in which specific concentrations of pollutants increase Covid 19…
Author(s): Luke Curtis
Year Published:

Smoke, as a prominent character of combustion, is widely regarded as a signal of forest fire. Existing in a video-based smoke root detection methods on rely the distance between smoke and the lens, which is one of the most challenging parts. In…
Author(s): Yu Gao, Pengle Cheng
Year Published:

Recent increases in destructive wildfires are driving a need for empirical research documenting factors that contribute to structure loss. Existing studies show that fire risk is complex and varies geographically, and the role of vegetation has been…
Author(s): Alexandra D. Syphard, Heather Rustigian-Romsos, Jon E. Keeley
Year Published:

The advancement of three-dimensional, time-dependent fire behaviour models is best supported by publicly available, co-located, synchronised, quality-assured measures of pre-fire, active fire and post-fire conditions (i.e. integrated datasets).…
Author(s): Derek McNamara, William E. Mell
Year Published:

Great Basin shrublands in the United States are rapidly converting to annual grass- dominated ecosystems, driven primarily by increased wildfire activity. Post-fire vegetation recovery trajectories vary spatially and temporally and are influenced by…
Author(s): Jody Vogeler, Eric Jensen, Beth A. Newingham
Year Published:

Ventenata (Ventenata dubia L.) is an invasive annual grass that has rapidly expanded its range across temperate grassland and shrub-steppe ecosystems in western North America. However, there is little published regarding its ecology, especially its…
Author(s): Luke W. Ridder, JoAnna M. Perren, Lesley R. Morris, Bryan A. Endress, Robert V. Taylor, Bridgett J. Naylor
Year Published:

This paper presents results from a computational and laboratory investigation of wind flow and fire spread over an isolated sloped-ridgeline laboratory-scale hill under various slopes with the wind blowing perpendicularly to the ridgeline. The…
Author(s): Abdelrahman Abouali, Domingos Xavier Viegas, J. R. Raposo
Year Published:

Wildfire is a growing global concern for rural and urban areas [1]. Statistics show that the intensity and negative consequences of wildfire have increased in recent decades creating serious challenges for fire and emergency services, as well as…
Author(s): Xilei Zhao, Ruggiero Lovreglio, Erica D. Kuligowski, Daniel Nilsson
Year Published:

Wildfire emissions affect downwind air quality and human health. Predictions of these impacts using models are limited by uncertainties in emissions and chemical evolution of smoke plumes. Using high-time-resolution aircraft measurements, we…
Author(s): Brett B. Palm, Qiaoyun Peng, Samuel R. Hall, Kirk Ullmann, Teresa L. Campos, Andrew J. Weinheimer, Denise D. Montzka, Geoffrey S. Tyndall, Wade Permar, Lu Hu, Frank Flocke, Emily V. Fischer, Joel A. Thornton
Year Published:

This work studies the characteristics of thunderstorms that cause lightning-caused wildfires in Catalonia, north-east Iberian Peninsula, using lightning and weather radar data. Although thunderstorms produce ~57 000 cloud-to-ground (CG) flashes…
Author(s): Anna Soler, Nicolau Pineda, Helen San Segundo, Joan Bech, Joan Montanyà
Year Published:

The increasing occurrence of severe wildfires, coupled with the expansion of the wildland urban interface has increased the number of structures in danger of being destroyed by wildfires. Ignition by firebrands is a significant avenue for fire…
Author(s): Derek Bean, David L. Blunck
Year Published:

Sediment delivery following post-fire logging is a concern relative to water quality. While studies have assessed the effect of post-fire logging on sediment yields at dif-ferent spatial scales, none have explicitly identified sediment sources. Our…
Author(s): Will H. Olsen, Joseph W. Wagenbrenner, Peter R. Robichaud
Year Published:

Subalpine forests that historically burned every 100–300 yr are expected to burn more frequently as climate warms, perhaps before trees reach reproductive maturity or produce a serotinous seedbank. Tree regeneration after short‐interval (<30‐yr)…
Author(s): Nathan S. Gill, Tyler J. Hoecker, Monica G. Turner
Year Published:

Uncompensable heat from wildland firefighter personal protective equipment decreases the physiological tolerance while exercising in the heat. Our previous work demonstrated that the standard wildland firefighter helmet significantly increases both…
Author(s): Katherine Christison, Shae Gurney, Charles L. Dumke
Year Published:

This work provides a detailed overview of existing investigations into the fire–wind interaction phenomena. Specifically, it considers: the fanning effect of wind, wind direction and slope angle, and the impact of wind on fire modelling, and the…
Author(s): Maryam Ghodrat, Farshad Shakeriaski, David James Nelson, Albert Simeoni
Year Published:

The public health emergency associated with the 2019–20 bushfires in Australia was a wake-up call to increase the resilience of our health systems to respond to climate extremes. We must combine our understanding of predictions of extreme weather…
Author(s): Aparna Lal, Mahomed Patel, Arnagretta Hunter, Christine Phillips
Year Published:

ive foliage for some tree and shrub species can support flaming fire spread at much higher moisture content than dead fuel materials. However, the role of live fuels in forest fires has been controversial in the past decades. Although ignition and…
Author(s): Adnan Darwish Ahmad, Ahmad M. Abubaker, Ahmad Salaimeh, Nelson K. Akafuah, Mark A. Finney, Jason M. Forthofer, Kozo Saito
Year Published: