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agricultural fires in the southeastern u.s. during seac4rs: emissions of trace gases and particles and evolution of ozone, reactive nitrogen, and organic aerosolEmissions from 15 agricultural fires in the southeastern U.S. were measured from the NASA DC-8 research aircraft during the summer 2013 Studies of Emissions and Atmospheric Composition, Clouds and Climate Coupling by Regional Surveys (SEAC4RS) campaign. This study reports a detailed set of emission factors (EFs) for 25 trace gases and 6 fine particle species. The chemical evolution of the primary emissions in seven plumes was examined in detail for ~1.2 h. A Lagrangian plume cross-section model was used to simulate the evolution of ozone (O3), reactive nitrogen species, and organic aerosol (OA). Observed EFs are generally consistent with previous measurements of crop residue burning, but the fires studied here emitted high amounts of SO2 and fine particles, especially primary OA and chloride. Filter-based measurements of aerosol light absorption implied that brown carbon (BrC) was ubiquitous in the plumes. In aged plumes, rapid production of O3, peroxyacetyl nitrate (PAN), and nitrate was observed with (Delta)O3/(Delta)CO, (Delta)PAN/(Delta)NOy, and (Delta)nitrate/(Delta)NOy reaching approx. 0.1, approx. 0.3, and approx.0.3. For five selected cases, the model reasonably simulated O3 formation but underestimated PAN formation. No significant evolution of OA mass or BrC absorption was observed. However, a consistent increase in oxygen-to-carbon (O/C) ratios of OA indicated that OA oxidation in the agricultural fire plumes was much faster than in urban and forest fire plumes. Finally, total annual SO2, NOx, and CO emissions from agricultural fires in Arkansas, Louisiana, Mississippi, and Missouri were estimated (within a factor of approx. 2) to be equivalent to approx. 2% SO2 from coal combustion and approx. 1% NOx and approx. 9% CO from mobile sources.
Document ID
20170003567
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Liu, X.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Zhang, Y.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Huey, L. G.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Yokelson, R. J.
(Montana State Univ. Missoula, MT, United States)
Wang, Y.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Jimenez, J. L.
(Colorado Univ. Boulder, CO, United States)
Campuzano-Jost, P.
(Colorado Univ. Boulder, CO, United States)
Beyersdorf, A. J.
(NASA Langley Research Center Hampton, VA, United States)
Blake, D. R.
(California Univ. Irvine, CA, United States)
Choi, Y.
(Science Systems and Applications, Inc. Hampton, VA, United States)
St. Clair, J. M.
(Maryland Univ. Baltimore County Catonsville, MD, United States)
Crounse, J. D.
(California Inst. of Tech. Pasadena, CA, United States)
Day, D. A.
(Colorado Univ. Boulder, CO, United States)
Diskin, G. S.
(NASA Langley Research Center Hampton, VA, United States)
Fried, A.
(Colorado Univ. Boulder, CO, United States)
Hall, S. R.
(National Center for Atmospheric Research Boulder, CO, United States)
Hanisco, T. F.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
King, L. E.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Meinardi, S.
(California Univ. Irvine, CA, United States)
Mikoviny, T.
(Oslo Univ. Norway)
Palm, B. B.
(Colorado Univ. Boulder, CO, United States)
Sachse, G.
(NASA Langley Research Center Hampton, VA, United States)
Thornhill, K. L.
(NASA Langley Research Center Hampton, VA, United States)
Wolfe, G. M.
(Maryland Univ. Baltimore County Catonsville, MD, United States)
Ziemba, L. D.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
April 17, 2017
Publication Date
June 22, 2016
Publication Information
Publication: Journal of Geophysical Research Atmospheres
Volume: 121
Issue: 12
ISSN: 2169-897X
Subject Category
Environment Pollution
Report/Patent Number
GSFC-E-DAA-TN41641
Funding Number(s)
CONTRACT_GRANT: NNX15AT34A
Distribution Limits
Public
Copyright
Other
Keywords
OA mass or BrC absorption