Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Lawrence F. Radke; Jamie H. Lyons; Peter V. Hobbs; Dean A. Hegg; David V. Sandberg; Darold E. Ward
    Date: 1990
    Source: Gen. Tech. Rep. PNW-GTR-251. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 81 p
    Publication Series: General Technical Report (GTR)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (2.42 MB)


    Detailed airborne measure ments of smoke plumes from seven prescribed burns of forest biomass residues leftover from timber harvests in Washington and Oregon are described. Measurements of particle size distributions in the plumes at 3.3 km downwind of the burns showed a prominent peak in the mass concentration for particles 0.25-0.30 µm in diameter. The total mass of particles in the plume was dominated, however, by supermicron-sized particles. The particle number distributions were dominated by large numbers of Aitken nuclei (median number diameter 0.15 µm).

    Based on numerous airborne measurements from six burns, the following average emission factors were determined using the carbon balance method: for total suspended particulates 1.2 ± 0.4 percent, for particles < 43 µm in diameter 0.6± 0.3 percent, and for particles < 0.2 µm in diameter 0.4 ± 0.2 percent. Particle mass fluxes for total suspended particulates, particles < 43 µm diameter, and particles < 2 µm diameter ranged from 0.1 to 2.4 kg · s-1, 0.1 to 1.1 kg · s -1, and 0.1 to 0.8 kg · s-1, respectively, for the smaller Oregon burns and from 1.1 to 11.7 kg · s-1, 0.6 to 7.0 kg · s-1, and 0.4 to 14.1 kg · s-1, respectively, for the larger Washington burns.

    Other samples collected in conjunction with the airborne work included those for trace gas analysis, particulate matter for trace element analysis, and gas concentration measurements for carbon-mass analysis (oxides of nitrogen, ozone, and hydrocarbons). Mass concentration-to-light scattering coefficient algorithms and ratios, which can be used to convert integrating nephelometer response to mass concentration units, are also reported.

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Radke, Lawrence F.; Lyons, Jamie H.; Hobbs, Peter V.; Hegg, Dean A.; Sandberg, David V.; Ward, Darold E. 1990. Airborne monitoring and smoke characterization of prescribed fires on forest lands in western Washington and Oregon. Gen. Tech. Rep. PNW-GTR-251. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 81 p


    Google Scholar


    Emissions, prescribed burning, smoke management

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page