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2,821 results found
Updating the National Fire-Danger Rating System (NFDRS) was completed in 1977, and operational use of it was begun the next year. The System provides a guide to wildfire control and suppression by its indexes that measure the relative potential of initiating fires. Such fires do not behave…
Author(s): Jack D. Cohen, John E. Deeming
Keywords: fire modeling, fire occurrence, fire-danger indexes, forest-fire hehavior, forest-fire risk, fuel moisture, fuel models
Source: Gen. Tech. Rep. PSW-82. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture; 16 p
Year: 1985
Widespread synchronous wildfires driven by climatic variation, such as those that swept western North America during 1996, 2000, and 2002, can result in major environmental and societal impacts. Understanding relationships between continental-scale patterns of drought and modes of sea surface…
Author(s): Thomas Kitzberger, Peter M. Brown, Emily K. Heyerdahl, Thomas W. Swetnam, Thomas T. Veblen
Keywords: Pacific-Atlantic Ocean, North America, wildfire, synchronous wildfires
Source: Proceedings of the National Academy of Sciences of the United States of America. 104(2): 543-548.
Year: 2007
Fire scientists in the United States began exploring the relationships of fire-danger and hazard with weather, fuel moisture, and ignition probabilities as early as 1916. Many of the relationships identified then persist today in the form of our National Fire-Danger-Rating System. This paper traces…
Author(s): Colin C. Hardy, Charles E. Hardy
Keywords: United States, National Fire-Danger-Rating System, Priest River Experiment Station, weather maps, satellite-derived maps, vegetation
Source: International Journal of Wildland Fire. 16: 217-231.
Year: 2007
The application of a next-generation dead-fuel moisture model, the 'Nelson model', to four timelag fuel classes using an extensive 21-month dataset of dead-fuel moisture observations is described. Developed by Ralph Nelson in the 1990s, the Nelson model is a dead-fuel moisture model designed to…
Author(s): J. D. Carlson, Larry S. Bradshaw, Ralph M. Nelson, Randall R Bensch, Rafal Jabrzemski
Keywords: dead-fuel moisture, modelling
Source: International Journal of Wildland Fire. 16: 204-216.
Year: 2007
Methods are needed to evaluate the ability of framing lumber and composite construction materials to withstand mold growth when they are exposed to rain between manufacture and installation. A laboratory-controlled rain chamber was developed to expose biocide-treated specimens of pine lumber and…
Author(s): Carol A. Clausen, Michael West
Keywords: Pine, lumber, waferboard, mold resistance, fungi resistance, test method
Source: Forest products journal. Vol. 55, no. 12 (Dec. 2005): pages 164-166.
Year: 2005
As a source of atmospheric carbon, biomass burning emissions associated with deforestation in the Amazon are globally significant. Once deforested, these lands continue to be sources of substantial burning emissions for many years due to frequent pasture burning. The objective of this research was…
Author(s): Liane S. Guild, J. Boone Kauffman, Warren B. Cohen, Christine A. Hlavka, Darold E. Ward
Keywords: Amazon, biomass burning, Brazil, carbon, land-cover change, land use, pasture, primary forest, regenerating forest, Rondônia, trace gas emissions
Source: Ecological Applications. 14(4): S232-S246
Year: 2004
Forest inventories and remote sensing are the two principal data sources used to estimate carbon (C) stocks and fluxes for large forest regions. National governments have historically relied on forest inventories for assessments but developments in remote sensing technology provide additional…
Author(s): Olga N. Krankina, Mark E. Harmon, Warren B. Cohen, Doug R. Oetter, Olga Zyrina, Maureen V. Duane
Source: Climatic Change. 67: 257-272
Year: 2004
We used a spatially nested hierarchy of field and remote-sensing observations and a process model, Biome-BGC, to produce a carbon budget for the forested region of Oregon, and to determine the relative influence of differences in climate and disturbance among the ecoregions on carbon stocks and…
Author(s): B.E. Law, D. Turner, J. Campbell, O.J. Sun, S. Van Tuyl, W.D. Ritts, W.B. Cohen
Keywords: carbon balance, carbon flux, respiration, net primary production, carbon stocks, soil carbon, carbon allocation, conifer forests
Source: Global Change Biology. 10: 1429-1444
Year: 2004
Exchange of carbon between forests and the atmosphere is a vital component of the global carbon cycle. Satellite laser altimetry has a unique capability for estimating forest canopy height, which has a direct and increasingly well understood relationship to aboveground carbon storage. While the…
Author(s): Michael A. Lefsky, David J. Harding, Michael Keller, Warren B. Cohen, Claudia C. Carabajal, Fernando Del Bom, Maria O. Hunter, Raimundo Jr. de Oliveira
Source: Geophysical Research Letters. 32: 1-4
Year: 2005
Radiation is one of the primary influences on vegetation composition and spatial pattern. Topographic orientation is often used as a proxy for relative radiation load due to its effects on evaporative demand and local temperature. Common methods for incorporating this information (i.e., site…
Author(s): Kenneth B. Jr. Pierce, Todd Lookingbill, Dean Urban
Keywords: aspect, DEM, GIS, solar insolation, species-environment interactions, topographic effects, vegetation distribution
Source: Landscape Ecology. 20: 137-147
Year: 2005