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Particle emissions from laboratory combustion of wildland fuels: In situ optical and mass measurements
Author(s) -
Chen L.W. Antony,
Moosmüller Hans,
Arnott W. Patrick,
Chow Judith C.,
Watson John G.,
Susott Ronald A.,
Babbitt Ronald E.,
Wold Cyle E.,
Lincoln Emily N.,
Hao Wei Min
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2005gl024838
Subject(s) - combustion , in situ , environmental science , particle (ecology) , atmospheric sciences , astrobiology , meteorology , geology , physics , chemistry , oceanography , organic chemistry
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‐wavelength photoacoustic detection for light absorption. This experiment clearly resolves the dependence of smoke properties on fuel and combustion phase. Intensive flaming combustion during ponderosa pine wood (PPW) burning produces particles with a low single scattering albedo of 0.32 and a specific mass extinction efficiency of 8.9 m 2 g −1 . Burning white pine needles (WPN) features a prolonged smoldering phase emitting particles that are not light‐absorbing and appear much larger in size with an extinction efficiency ≈5 m 2 g −1 . A Mie scattering model was formulated, which estimates the black carbon fraction in the PPW and WPN smoke particles at 66% and 12%, respectively. These observations may refine the current radiative forcing estimates for biomass burning emissions.