Climate change, with warming temperatures and shifting precipitation patterns, may increase natural-caused forest fire activity. Increasing natural-caused fires throughout western United States national forests could place people, property, and infrastructure at risk in the future. We used the fine…
Keywords: national forests, climate change, wildfire, warming temperature
There is no scientific dispute regarding the existence of a greenhouse effect. There is no doubt that water vapor, carbon dioxide (CO2), and methane concentrations are greenhouse gases. The data showing increases in CO2 in the atmosphere are incontrovertible. Uncertainties arise when the Earth's…
Source: In: Gen. Tech. Rep. SRS–75. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. Chapter 31. p. 365-371.
ECOPHYS is an ecophysiological whole-tree growth process model designed to simulate the growth of poplar in the establishment year. This microcomputer-based model may be used to test the influence of genetically determined physiological or morphological attributes on plant growth. This manual…
Keywords: Populus, poplar, whole-tree process model, short-rotation intensive culture, photosynthesis, carbon allocation
Source: General Technical Report NC-141. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Presents maps of late-spring freeze characteristics for the northeastern and north central United States based on heat-sum thresholds and historic climate data. Discusses patterns seen in the maps. Provides examples and ways these maps could be used by resource managers and research scientists.
Keywords: freeze, climate
Source: Gen. Tech. Rep. NC-204. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 35 p.
There is little question that global warming would increase the risk of wildfires by drying out vegetation and stirring the winds that spread fire. Until recently, however, land managers were unable to formulate appropriate responses because the spatial scales of predictions were far too coarse.…
Source: Science Findings 74. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p
Western hemlock (Tsuga heterophylla) can be characterized by localized regions of high-moisture-content wood, often referred to as wet pockets, and uneven drying conditions may occur when lumber of higher and lower moisture content is mixed together in a dry kiln. The primary objective of…
Keywords: Western hemlock, Tsuga heterophylla, lumber, drying, sawmill, moisture content, Alaska
Source: Res. Note PNW-RN-530. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 8 p
Comandra blister rust is a damaging canker disease of lodgepole pine in the Central Rocky Mountains. Our knowledge of previous blister rust outbreaks and the effects of weather and climate on rust epidemiology has not been sufficient to explain the frequency and severity of disease outbreaks. Thus…
Keywords: climate, weather, meteorology, risk rating, spore dispersal
Source: Res. Pap. RMRS-RP-36. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 13 p.
1. We examined how rapidly soils can change during secondary succession by observing soil development on 350-year chronosequences in three pristine forest ecosystems in south-east Alaska. 2. Soil surfaces, created by different windthrow events of known or estimated age, were examined within each of…
Keywords: C accumulation, chronosequence, disturbance frequency, podzolization, soil development, soil disturbance, windthrow
Source: Journal of Ecology. 83: 747 - 757
Natural ponderosa pine fuels can be safely burned with air temperatures between 55° and 75°
Keywords: fuel reduction, hazard reduction, burning prescription, Pinus ponderosa var. arizonica
Source: Res. Note RM-RN-402. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 7 p.
Arizona's natural ponderosa pine stands are characterized by open, mature groups and adjacent closed, dense thickets. The open structure of the mature groups permits a warm, dry environment, resulting in very low fuel moisture during much of the fire season and creating high ignition and fire…
Keywords: fuel loadings, stand characteristics, fire behavior potential, Pinus ponderosa var. arizonica
Source: Res. Note RM-RN-418. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 6 p.