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Environ Sci Technol

Title:		Nighttime Chemical Transformation in Biomass Burning Plumes: A Box Model Analysis Initialized with Aircraft Observations
Author(s):		Decker ZCJ; Zarzana KJ; Coggon M; Min KE; Pollack I; Ryerson TB; Peischl J; Edwards P; Dube WP; Markovic MZ; Roberts JM; Veres PR; Graus M; Warneke C; de Gouw J; Hatch LE; Barsanti KC; Brown SS;
Address:		"Cooperative Institute for Research in Environmental Sciences, University of Colorado , Boulder , Colorado 80309 , United States. Department of Chemistry , University of Colorado , Boulder , Colorado 80309-0215 , United States. NOAA Earth System Research Laboratory (ESRL) , Chemical Sciences Division , Boulder , Colorado 80305 , United States. Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry , University of York , York YO10 5DD , United Kingdom. Department of Chemical and Environmental Engineering and College of Engineering - Center for Environmental Research and Technology (CE-CERT) , University of California , Riverside , California 92507 , United States"
Journal Title:		Environ Sci Technol
Year:		2019
Volume:		20190214
Issue:		5
Page Number:		2529 - 2538
DOI:		10.1021/acs.est.8b05359
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Biomass burning (BB) is a large source of reactive compounds in the atmosphere. While the daytime photochemistry of BB emissions has been studied in some detail, there has been little focus on nighttime reactions despite the potential for substantial oxidative and heterogeneous chemistry. Here, we present the first analysis of nighttime aircraft intercepts of agricultural BB plumes using observations from the NOAA WP-3D aircraft during the 2013 Southeast Nexus (SENEX) campaign. We use these observations in conjunction with detailed chemical box modeling to investigate the formation and fate of oxidants (NO(3), N(2)O(5), O(3), and OH) and BB volatile organic compounds (BBVOCs), using emissions representative of agricultural burns (rice straw) and western wildfires (ponderosa pine). Field observations suggest NO(3) production was approximately 1 ppbv hr(-1), while NO(3) and N(2)O(5) were at or below 3 pptv, indicating rapid NO(3)/N(2)O(5) reactivity. Model analysis shows that >99% of NO(3)/N(2)O(5) loss is due to BBVOC + NO(3) reactions rather than aerosol uptake of N(2)O(5). Nighttime BBVOC oxidation for rice straw and ponderosa pine fires is dominated by NO(3) (72, 53%, respectively) but O(3) oxidation is significant (25, 43%), leading to roughly 55% overnight depletion of the most reactive BBVOCs and NO(2)"
Keywords:		Aerosols Aircraft *Atmosphere Biomass *Fires;
Notes:		"MedlineDecker, Zachary C J Zarzana, Kyle J Coggon, Matthew Min, Kyung-Eun Pollack, Ilana Ryerson, Thomas B Peischl, Jeff Edwards, Pete Dube, William P Markovic, Milos Z Roberts, James M Veres, Patrick R Graus, Martin Warneke, Carsten de Gouw, Joost Hatch, Lindsay E Barsanti, Kelley C Brown, Steven S eng 2019/01/31 Environ Sci Technol. 2019 Mar 5; 53(5):2529-2538. doi: 10.1021/acs.est.8b05359. Epub 2019 Feb 14"