Parameterizations of US wildfire and prescribed fire emission ratios and emission factors based on FIREX-AQ aircraft measurements

作者：Georgios I. Gkatzelis, Matthew M. Coggon, Chelsea E. Stockwell, Rebecca S. Hornbrook, Hannah M. Allen, Eric C. Apel, M. M. Bela, D. R. Blake, Ilann Bourgeois, Steven S. Brown, Pedro Campuzano‐Jost, Jason M. St. Clair, J. H. Crawford, John D. Crounse, Douglas A. Day, Joshua P. DiGangi, Glenn S. Diskin, Alan Fried, J. B. Gilman, Hongyu Guo, Johnathan W. Hair, Hannah S. Halliday, T. F. Hanisco, Reem A. Hannun, Alan J. Hills, L. G. Huey, J. L. Jiménez, Joseph M. Katich, Aaron Lamplugh, Young Ro Lee, J. Liao, Jakob Lindaas, S. A. McKeen, Tomáš Mikoviny, Benjamin A. Nault, J. A. Neuman, J. B. Nowak, Demetrios Pagonis, Jeff Peischl, A. E. Perring, Felix Piel, Pamela S. Rickly, Michael Robinson, Andrew W. Rollins, Thomas B. Ryerson, Melinda K. Schueneman, Rebecca H. Schwantes, Joshua P. Schwarz, Kanako Sekimoto, Vanessa Selimovic, Taylor Shingler, David J. Tanner, Laura Tomsche, Krystal Vasquez, Patrick R. Veres, R. A. Washenfelder, P. Weibring, P. O. Wennberg, Armin Wisthaler, Glenn M. Wolfe, Caroline C. Womack, Lu Xu, Katherine Ball, R. J. Yokelson, C. Warneke · 发表于：Atmospheric chemistry and physics · 年份：2024 · DOI：10.5194/acp-24-929-2024 · 被引用次数：44 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Fire effects on ecosystems

Abstract. Extensive airborne measurements of non-methane organic gases (NMOGs), methane, nitrogen oxides, reduced nitrogen species, and aerosol emissions from US wild and prescribed fires were conducted during the 2019 NOAA/NASA Fire Influence on Regional to Global Environments and Air Quality campaign (FIREX-AQ). Here, we report the atmospheric enhancement ratios (ERs) and inferred emission factors (EFs) for compounds measured on board the NASA DC-8 research aircraft for nine wildfires and one prescribed fire, which encompass a range of vegetation types. We use photochemical proxies to identify young smoke and reduce the effects of chemical degradation on our emissions calculations. ERs and EFs calculated from FIREX-AQ observations agree within a factor of 2, with values reported from previous laboratory and field studies for more than 80 % of the carbon- and nitrogen-containing species. Wildfire emissions are parameterized based on correlations of the sum of NMOGs with reactive nitrogen oxides (NOy) to modified combustion efficiency (MCE) as well as other chemical signatures indicative of flaming/smoldering combustion, including carbon monoxide (CO), nitrogen dioxide (NO2), and black carbon aerosol. The sum of primary NMOG EFs correlates to MCE with an R2 of 0.68 and a slope of −296 ± 51 g kg−1, consistent with previous studies. The sum of the NMOG mixing ratios correlates well with CO with an R2 of 0.98 and a slope of 137 ± 4 ppbv of NMOGs per parts per million by volume (...