Pollutant emission factors data for smoldering conifer forest duff from Oregon

Principal Investigator(s):  View help for Principal Investigator(s) US Department of Agriculture; US Forest Service

Version:  View help for Version V1

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Project Citation: 

US Department of Agriculture, and US Forest Service. Pollutant emission factors data for smoldering conifer forest duff from Oregon. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2026-05-31. https://doi.org/10.3886/E248744V1

Project Description

Project Title:  View help for Project Title Pollutant emission factors data for smoldering conifer forest duff from Oregon
Summary:  View help for Summary Carbonaceous gases and fine particulate matter (PM2.5) from smoldering conifer forest duff were sampled in four bench-scale experimental burns in a combustion facility at Oregon State University. An infrared camera measured surface radiance of the smoldering duff during the burns. The duff was harvested from Douglas-fir forest stands in eastern Oregon in April 2021. Duff samples were burned in May 2021. Samples were 43 centimeters (cm) x 43 cm in area and approximately 4 cm thick. The gases measured were carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), and 19 light (≤ 6 carbon [C]) non-methane hydrocarbons (NMHC). The gas and PM2.5 measurements were used to calculate emission factors (EFX) for each species (mass of X emitted per mass of duff consumed). The IR camera images were processed to provide measurements of surface temperature (T), fire radiative power (FRP), and area of active smoldering for the duff. A Bayesian framework analysis was used to jointly fit an autoregressive model to impute missing T values (T during emission sampling) and a multivariate normal data model to fit five emission factor (EF) responses (EFCO2, EFCO, EFCH4, EFNMHC, and EFPM2.5) to the temperature time series. The Bayesian framework analysis provided best-estimate EF which represent the true EF of the natural, unperturbed smoldering duff along with 95% credible intervals. This data publication includes all observed and Bayesian EF responses at the sample-level as well as summarized to the burn-level.
Original Distribution URL:  View help for Original Distribution URL https://www.fs.usda.gov/rds/archive/catalog/RDS-2025-0046

Scope of Project

Subject Terms:  View help for Subject Terms environment; Fire; Prescribed fire; Smoke; emission factors; smoldering combustion; air quality; Oregon
Geographic Coverage:  View help for Geographic Coverage Oregon
Time Period(s):  View help for Time Period(s) 4/1/2021 – 5/1/2021
Data Type(s):  View help for Data Type(s) observational data
Collection Notes:  View help for Collection Notes DOI: https://doi.org/10.2737/RDS-2025-0046 Authors: Urbanski, Shawn P. ; Kay, Shannon L. ; Baker, Stephen P. ; Lincoln, Emily N. ; Ross, Andrew A. ; Blunck, David L. Publication year: 2025 (Downloaded 2026-05-30)


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V1 [2026-05-31]

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