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Title: Regional Influence of Aerosol Emissions from Wildfires Driven by Combustion Efficiency: Insights from the BBOP Campaign

Wildfires are important contributors to atmospheric aerosols and a large source of emissions that impact regional air quality and global climate. In this study, the regional and nearfield influences of wildfire emissions on ambient aerosol concentration and chemical properties in the Pacific Northwest region of the United States were studied using real-time measurements from a fixed ground site located in Central Oregon at the Mt. Bachelor Observatory (~2700 m a.s.l.) as well as near their sources using an aircraft. In addition, the regional characteristics of biomass burning aerosols were found to depend strongly on the modified combustion efficiency (MCE), an index of the combustion processes of a fire. Organic aerosol emissions had negative correlations with MCE, whereas the oxidation state of organic aerosol increased with MCE and plume aging. The relationships between the aerosol properties and MCE were consistent between fresh emissions (~1 h old) and emissions sampled after atmospheric transport (6–45 h), suggesting that biomass burning organic aerosol concentration and chemical properties were strongly influenced by combustion processes at the source and conserved to a significant extent during regional transport. In conclusion, these results suggest that MCE can be a useful metric for describing aerosol properties of wildfire emissionsmore » and their impacts on regional air quality and global climate.« less
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [2] ;  [8] ;  [2] ;  [9] ;  [1] ;  [1] ;  [1] ;  [10] ;  [8] ;  [10] ;  [8] ;  [5] more »;  [1] « less
  1. Univ. of California, Davis, CA (United States). Department of Environmental Toxicology
  2. Aerodyne Research Inc., Billerica, MA (United States)
  3. University of Washington, Bothell, WA (United States). School of Science and Technology; University of Washington, Seattle, WA (United States). Department of Atmospheric Sciences
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental and Climate Sciences Department
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental and Climate Sciences Department
  6. University of Washington, Bothell, WA (United States). School of Science and Technology; University of Washington, Seattle, WA (United States). Department of Atmospheric Sciences; Gradient, Seattle, WA (United States)
  7. University of Washington, Bothell, WA (United States). School of Science and Technology
  8. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Atmospheric Science and Global Change Div. (ASGC)
  9. Univ. of Montana, Missoula, MT (United States). Department of Chemistry
  10. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Earth and Environmental Sciences Division
Publication Date:
Report Number(s):
BNL-112467-2016-JA
Journal ID: ISSN 0013-936X; R&D Project: 2016-BNL-EE630EECA-Budg; KP1701000
Grant/Contract Number:
SC0014620; SC0007178; SC0014287; AC05-76RL01830
Type:
Accepted Manuscript
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 50; Journal Issue: 16; Journal ID: ISSN 0013-936X
Publisher:
American Chemical Society (ACS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES
OSTI Identifier:
1336079