Type
Topic
Region
Year
Displaying 1701 - 1725 of 1797
This study analyzes spatial and temporal variability of emissions from wildland fires across the contiguous US. The emissions are estimates based on a recently constructed dataset of historical fire records collected by multiple US governmental agencies. Both wildfire and…
Person:
Year: 2004
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Effects, Prescribed Fire
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: air pollution, PM - particulate matter
The area burned by forest fires in Canada has increased over the past four decades, at the same time as summer season temperatures have warmed. Here we use output from a coupled climate model to demonstrate that human emissions of greenhouse gases and sulfate aerosol have made a…
Person:
Year: 2004
Type: Document
Source: FRAMES
Topic(s): Climate, Emissions and Smoke, Fire Effects, Social Science
Region(s): Alaska, International
Keywords: Canada, greenhouse gas emissions, greenhouse gases, human induced climate change, increased temperatures
The uncertainty in carbon emissions from fire was estimated for the boreal region of Alaska over the 50 years of recorded wildfire. Building on previous work where carbon emissions were estimated using a geographic information systems-based model, the uncertainty attached to the…
Person:
Year: 2004
Type: Document
Source: FRAMES
Topic(s): Climate, Emissions and Smoke, Fire Effects
Region(s): Alaska
Keywords: boreal forest, carbon cycling, Monte Carlo simulations, biomass burning
The majority of burning in the boreal forest zone consists of stand replacement fires larger than 10 km2 occurring in remote, sparsely populated regions. Satellite remote sensing using coarse resolution (~1 km) sensors is thus well suited in documenting the spatial and temporal…
Person:
Year: 2002
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fire Effects, Mapping
Region(s): Alaska, International
Keywords: boreal forest, Canada, fire, regeneration, remote sensing, AVHRR - Advanced Very High Resolution Radiometer, burned area, fire mapping, spatial distribution, SPOT-VEGETATION
Biomass burning releases significant amounts of trace gases and smoke aerosol into the atmosphere. This has an impact on the Earth's radiation budget, the magnitude of which has not yet been well quantified. Satellite remote sensing is well suited to assessing the area of…
Person:
Year: 2000
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fire Effects, Mapping
Region(s): Alaska, International
Keywords: Canada, fire, NDVI - Normalized Difference Vegetation Index, remote sensing, smoke emissions, AVHRR - Advanced Very High Resolution Radiometer, biomass consumption, heat flux, thermal hotspot detections
Despite increasing temperatures since the end of the Little Ice Age (ca. 1850), wildfire frequency has decreased as shown in many field studies from North America and Europe. We believe that global warming since 1850 may have triggered decreases in fire frequency in some regions…
Person:
Year: 1998
Type: Document
Source: FRAMES, TTRS
Topic(s): Climate, Emissions and Smoke, Fire Behavior, Fire Ecology, Fire History, Fire Occurrence, Hazard and Risk, Mapping, Models, Weather
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, International, National
Keywords: boreal forests, Canada, climate model, global change, Europe, Abies balsamea, age classes, Alberta, Betula spp., bibliographies, CO2 - carbon dioxide, climatology, distribution, ecosystem dynamics, Finland, fire danger rating, fire exclusion, fire frequency, fire intensity, fire management, fire regimes, fire size, climate change, grasslands, histories, humidity, Iva, Lake States, land use, Minnesota, Montana, New Brunswick, North Dakota, Norway, Ontario, Picea spp., pine hardwood forests, Pinus spp., population density, Populus spp., precipitation, Quebec, Rocky Mountains, Scandinavia, season of fire, South Dakota, species diversity, succession, Sweden, temperature, Vermont, wildfires, wind, Wyoming
This study investigates the impact of postulated greenhouse warming on the severity of the forest fire season in Canada. Using CO2 levels that are double those of the present (2 X CO2), simulation results from three general circulation models (Geophysical Fluid Dynamics…
Person:
Year: 1991
Type: Document
Source: FRAMES, TTRS
Topic(s): Climate, Emissions and Smoke, Fire Behavior, Fire Ecology, Fire Occurrence, Models, Weather
Region(s): Alaska, International
Keywords: Canada, wildfire, climate change, CO2 - carbon dioxide, global warming, British Columbia, climatology, drought, ecosystem dynamics, fire frequency, fire intensity, fire regimes, fire size, humidity, New Brunswick, Ontario, precipitation, Saskatchewan, season of fire, temperature, weather observations
The summer of 2004 was a hot and smoky one for Alaska's Interior, focusing residents' attention on fire management issues. Natural regeneration of the boreal forest after fire literally has made the forests that are managed today. Forestry professor Scott Rupp and others are…
Person:
Year: 2004
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fuels, Models
Region(s): Alaska
Keywords: fire management, regeneration, 2004 fire season, fire plan, fire recovery, fuel modeling, tourism
A comprehensive evaluation of the vertical structure of a smoldering smoke plume was afforded by a unique combination of tethersonde measurements (from ground level to about 400 m above ground level (AGL) or 274-674 m above sea level (AGL)), lidar sounding (from about 1.5 to 5…
Person:
Year: 2003
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fire Effects
Region(s): Alaska
Keywords: biomass, emission, Frostfire, particles
Atmospheric particulate matter can be strongly affected by smoke from biomass combustion, including wildfires, prescribed burns, and residential wood burning. Molecular source tracer techniques help determine contributions of biomass smoke to particle concentrations if…
Person:
Year: 2006
Type: Document
Source: FRAMES, TTRS
Topic(s): Climate, Economics, Emissions and Smoke, Fire Behavior, Fire Effects, Fuels, Prescribed Fire
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: air quality, PM2.5, levoglucosan, IC-PAD, aerosols, emission factors, biomass, broadcast burning, C - carbon, cellulose, chemical compounds, combustion, duff, fire management, forest products, fuel types, grasses, laboratory fires, needles, particulates, sloping terrain, smoke management, wildfires, wood, wood properties
An overview is given of recent research on forest fires, particularly climate change and its implications for forest fire and vegetation zoning in Russian and Canadian boreal forests, fire emissions and their impact on the atmosphere, the predicted catastrophic effects on global…
Person:
Year: 1998
Type: Document
Source: FRAMES
Topic(s): Climate, Emissions and Smoke, Fire Ecology, Fire Effects
Region(s): Alaska
Keywords: boreal forest, Canada, fire, smoke emissions, air pollution, climate change, Russia, biomass burning
Fire performs many beneficial ecosystem functions in dry forests and rangelands across much of North America. In the last century, however, the role of fire has been dramatically altered by numerous anthropogenic factors acting as root causes of the current fire crisis,…
Person:
Year: 2004
Type: Document
Source: FRAMES, TTRS
Topic(s): Administration, Climate, Economics, Emissions and Smoke, Fire Behavior, Fire Ecology, Fire Effects, Fire Prevention, Fuels, Hazard and Risk, Intelligence, Mapping, Outreach, Planning, Prescribed Fire, Regulations and Legislation, Restoration and Rehabilitation, Social Science, Wildland-Urban Interface (WUI)
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: fire management, ecological integrity, fire restoration, public lands, wildfire policy, age classes, bibliography, catastrophic fires, climatology, coniferous forests, conservation, disturbance, ecosystem dynamics, education, fire hazard reduction, fire suppression, fire management planning, fire regimes, forest fragmentation, forest types, fragmentation, fuel accumulation, fuel management, grazing, introduced species, invasive species, landscape ecology, livestock, logging, natural resource legislation, old growth forest, plant communities, post-fire recovery, public information, riparian habitats, roads, salvage, animal species diversity, plant species diversity, succession, suppression, thinning, weed control, wilderness areas, wilderness fire management, wildfires, wildlife refuges
The structure and dynamics of buoyant plumes arising from surface-based heat sources in a vertically sheared ambient atmospheric flow are examined via simulations of a three-dimensional, compressible numerical model. Simple circular heat sources and asymmetric elliptical ring…
Person:
Year: 2005
Type: Document
Source: FRAMES, TTRS
Topic(s): Emissions and Smoke, Fire Behavior, Models, Prescribed Fire
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, International, National
Keywords: numerical simulation, plumes, circular heat sources, asymmetric elliptical ring heat sources , coherent vortical structures, air quality, convection, ecology, fire intensity, fire management, Florida, smoke behavior, heat, smoke management, statistical analysis, wind, wildfires
Laboratory experiments were conducted to investigate how both mineral soil and moisture content affect the smoldering combustion in forest duff. Peat was used to represent the fermentation and humus horizons (Oe and Oa soil horizons) of a coniferous forest floor nominally called…
Person:
Year: 1987
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fuels
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: canopy, combustion, Douglas-fir, jack pine, Pinus banksiana, Pseudotsuga menziesii, surface fire, coniferous forest, duff, Engelmann spruce, fermentation, humus, inorganic content, Larix occidentalis, lightning ignitions, mineral soil, moisture content, peat, Picea engelmannii, root damage, smoke pollution, smoldering, western larch, holdover fires
Emissions from forest fires in Alaska and the Yukon Territory were observed at Chebogue Point, Nova Scotia (43.7°N, 66.1°W), between 11 and 13 July 2004. Smoke aerosols were first detected in the free troposphere by a Raman lidar and extended up to 8 km altitude. The plume was…
Person:
Year: 2007
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Effects
Region(s): Alaska, International
Keywords: Canada, boreal fire, meteorology, Yukon Territory, smoke aerosols, atmospheric transport, Nova Scotia, troposphere
Intercontinental Transport of Ozone and Precursors (ITOP) ( part of International Consortium for Atmospheric Research on Transport and Transformation (ICARTT)) was an intense research effort to measure long-range transport of pollution across the North Atlantic and its impact on…
Person:
Year: 2007
Type: Document
Source: FRAMES
Topic(s): Aviation, Emissions and Smoke, Fire Effects, Models
Region(s): Alaska
Keywords: CO - carbon monoxide, tropospheric ozone, Alaska wildfires, biomass burning emissions inventories, Canadian wildfires, chemical transport model, ICARTT - International Consortium for Atmospheric Research on Transport and Transformation, ITOP - Intercontinental Transport of Ozone and Precursors, long-range transport of pollution, North Atlantic, O3 - ozone, plumes, p-TOMCAT
In the boreal forest, high-intensity crown fires account for an overwhelming proportion of the area burned yearly. Quantifying the amount of black carbon (BC) from boreal crown fires in Canada is essential for assessing the effect on regional climate from natural wildfire…
Person:
Year: 2002
Type: Document
Source: FRAMES
Topic(s): Climate, Emissions and Smoke, Fire Behavior
Region(s): Alaska, International
Keywords: Canada, atmospheric particles, black carbon, climate change, elemental carbon, biomass burning, boreal forest fires
Carbon emissions in fires in the boreal forests of Russia were calculated from data on the area burned, fire intensity, post-fire mortality and decomposition of fuels, and change in vegetation structure after fires. The actual area of boreal forests burned in Russia appears to…
Person:
Year: 1998
Type: Document
Source: FRAMES
Topic(s): Climate, Emissions and Smoke, Fire Ecology, Fire Effects
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: boreal forest, fire frequency, fire intensity, carbon emissions, carbon sink, carbon stock, human impacts
Low-level helicopter flights were used to collect samples of smoke from burning chaparral in southern California and over a boreal forest fire in norther Ontario, Canada. The smoke plume samples were analyzed for carbon dioxide (CO2), carbon monoxide (CO), hydrogen (H2), methane…
Person:
Year: 1989
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior
Region(s): Alaska, California, International
Keywords: boreal forest, southern California, Canada, chaparral, combustion, CO2 - carbon dioxide, CO - carbon monoxide, flaming combustion, N2O - nitrous oxide, smoldering combustion, trace gas emissions, CH4 - methane, northern Ontario, H2 - hydrogen
Time-resolved optical properties of smoke particles from the controlled laboratory combustion of mid-latitude wildland fuels were determined for the first time using advanced techniques, including cavity ring-down/cavity enhanced detection (CRD/CED) for light extinction and two-…
Person:
Year: 2006
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Effects, Fuels, Models
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: fuel consumption, aerosols, particles, pollution, radiation
Although fire is crucial to the functioning and diversity of boreal forests, the second largest biome on Earth, there are few detailed studies of the effects of disturbance on surface-atmosphere interactions in these regions. We conducted tower-based micrometeorological…
Person:
Year: 2002
Type: Document
Source: FRAMES
Topic(s): Climate, Emissions and Smoke, Fire Ecology, Fire Effects, Fuels
Region(s): Alaska
Keywords: disturbance, eddy-covariance method, fire, soils, albedo, atmosphere, biosphere, black spruce, boreal, net radiation, Picea mariana, severity, radiative processes
The NOAA WP-3 aircraft intercepted aged forest fire plumes from Alaska and western Canada during several flights of the NEAQS-ITCT 2k4 mission in 2004. Measurements of acetonitrile (CH3CN) indicated that the air masses had been influenced by biomass burning. The locations of the…
Person:
Year: 2006
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fire Effects
Region(s): Alaska, International
Keywords: Canada, fire weather, biomass combustion, plume composition, transport model, smoke plumes, VOC - volatile organic carbon
Summer 2004 saw severe forest fires in Alaska and the Yukon Territory that were mostly triggered by lightning strikes. The area burned (>2.7 x 10^6 ha) in the year 2004 was the highest on record to date in Alaska. Pollutant emissions from the fires lead to violation of…
Person:
Year: 2006
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Effects, Models, Weather
Region(s): Alaska
Keywords: air quality, boreal forest, fire weather, LiDAR - Light Detection and Ranging, lightning, N - nitrogen, remote sensing, simulation, area burned, burning, emission, Fairbanks, fire activity, lightning strikes, measurement, quality, studies, summer, transport model, Yukon Territory, fires
We adopt a working definition of residual smoldering combustion (RSC) as biomass combustion that produces emissions that are not lofted by strong fire-induced convection. RSC emissions can be produced for up to several weeks after the passage of a flame front and they are mostly…
Person:
Year: 2003
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fuels
Region(s): Alaska, California, Eastern, Great Basin, Hawaii, Northern Rockies, Northwest, Rocky Mountain, Southern, Southwest, National
Keywords: particles, smoldering combustion, trace gas emissions, biomass burning
Aerosols from wildfires are the primary aerosols in the Arctic atmosphere during the summer months. These aerosols occur in large, increasing quantities and impact the sensitive radiative balance in the Arctic. FROSTFIRE, a controlled burn in a Long-Term Ecological Research Area…
Person:
Year: 2008
Type: Document
Source: FRAMES
Topic(s): Emissions and Smoke, Fire Behavior, Fire Effects, Prescribed Fire
Region(s): Alaska
Keywords: boreal forest, wildfire, Arctic, flaming phase, Frostfire, permafrost, smoke aerosols, aerosol impactor, smoldering phase