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Airborne and ground-based measurements of the trace gases and particles emitted by prescribed fires in the United States

Journal Article


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Abstract


  • We have measured emission factors for 19 trace

    gas species and particulate matter (PM2.5) from 14 prescribed

    fires in chaparral and oak savanna in the southwestern

    US, as well as conifer forest understory in the southeastern

    US and Sierra Nevada mountains of California. These are

    likely the most extensive emission factor field measurements

    for temperate biomass burning to date and the only published

    emission factors for temperate oak savanna fuels. This study

    helps to close the gap in emissions data available for temperate

    zone fires relative to tropical biomass burning. We

    present the first field measurements of the biomass burning

    emissions of glycolaldehyde, a possible precursor for aqueous

    phase secondary organic aerosol formation. We also

    measured the emissions of phenol, another aqueous phase

    secondary organic aerosol precursor. Our data confirm previous

    observations that urban deposition can impact the NOx

    emission factors and thus subsequent plume chemistry. For

    two fires, we measured both the emissions in the convective

    smoke plume from our airborne platform and the unlofted

    residual smoldering combustion emissions with our groundbased

    platform. The smoke from residual smoldering combustion

    was characterized by emission factors for hydrocarbon

    and oxygenated organic species that were up to ten times

    higher than in the lofted plume, including high 1,3-butadiene

    and isoprene concentrations which were not observed in the

    lofted plume. This should be considered in modeling the air quality impacts for smoke that disperses at ground level. We

    also show that the often ignored unlofted emissions can significantly

    impact estimates of total emissions. Preliminary

    evidence suggests large emissions of monoterpenes in the

    residual smoldering smoke. These data should lead to an

    improved capacity to model the impacts of biomass burning

    in similar temperate ecosystems.

UOW Authors


  •   Burling, I R. (external author)
  •   Yokelson, R J. (external author)
  •   Akagi, S K. (external author)
  •   Urbanski, S P. (external author)
  •   Wold, C E. (external author)
  •   Griffith, David
  •   Johnson, T J. (external author)
  •   Reardon, J (external author)
  •   Weise, D R. (external author)

Publication Date


  • 2011

Citation


  • Burling, I. R., Yokelson, R. J., Akagi, S. K., Urbanski, S. P., Wold, C. E., Griffith, D. W. T., Johnson, T. J., Reardon, J. & Weise, D. R. (2011). Airborne and ground-based measurements of the trace gases and particles emitted by prescribed fires in the United States. Atmospheric Chemistry and Physics, 11 (23), 12107-12216.

Scopus Eid


  • 2-s2.0-80051680940

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7263&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3921

Has Global Citation Frequency


Number Of Pages


  • 109

Start Page


  • 12107

End Page


  • 12216

Volume


  • 11

Issue


  • 23

Abstract


  • We have measured emission factors for 19 trace

    gas species and particulate matter (PM2.5) from 14 prescribed

    fires in chaparral and oak savanna in the southwestern

    US, as well as conifer forest understory in the southeastern

    US and Sierra Nevada mountains of California. These are

    likely the most extensive emission factor field measurements

    for temperate biomass burning to date and the only published

    emission factors for temperate oak savanna fuels. This study

    helps to close the gap in emissions data available for temperate

    zone fires relative to tropical biomass burning. We

    present the first field measurements of the biomass burning

    emissions of glycolaldehyde, a possible precursor for aqueous

    phase secondary organic aerosol formation. We also

    measured the emissions of phenol, another aqueous phase

    secondary organic aerosol precursor. Our data confirm previous

    observations that urban deposition can impact the NOx

    emission factors and thus subsequent plume chemistry. For

    two fires, we measured both the emissions in the convective

    smoke plume from our airborne platform and the unlofted

    residual smoldering combustion emissions with our groundbased

    platform. The smoke from residual smoldering combustion

    was characterized by emission factors for hydrocarbon

    and oxygenated organic species that were up to ten times

    higher than in the lofted plume, including high 1,3-butadiene

    and isoprene concentrations which were not observed in the

    lofted plume. This should be considered in modeling the air quality impacts for smoke that disperses at ground level. We

    also show that the often ignored unlofted emissions can significantly

    impact estimates of total emissions. Preliminary

    evidence suggests large emissions of monoterpenes in the

    residual smoldering smoke. These data should lead to an

    improved capacity to model the impacts of biomass burning

    in similar temperate ecosystems.

UOW Authors


  •   Burling, I R. (external author)
  •   Yokelson, R J. (external author)
  •   Akagi, S K. (external author)
  •   Urbanski, S P. (external author)
  •   Wold, C E. (external author)
  •   Griffith, David
  •   Johnson, T J. (external author)
  •   Reardon, J (external author)
  •   Weise, D R. (external author)

Publication Date


  • 2011

Citation


  • Burling, I. R., Yokelson, R. J., Akagi, S. K., Urbanski, S. P., Wold, C. E., Griffith, D. W. T., Johnson, T. J., Reardon, J. & Weise, D. R. (2011). Airborne and ground-based measurements of the trace gases and particles emitted by prescribed fires in the United States. Atmospheric Chemistry and Physics, 11 (23), 12107-12216.

Scopus Eid


  • 2-s2.0-80051680940

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7263&context=scipapers

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/3921

Has Global Citation Frequency


Number Of Pages


  • 109

Start Page


  • 12107

End Page


  • 12216

Volume


  • 11

Issue


  • 23