气候变化领域集成服务门户(CCPortal): Measurement report: Emission factors of NH3 and NHx for wildfires and agricultural fires in the United States

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DOI	10.5194/acp-23-2331-2023
	Measurement report: Emission factors of NH3 and NHx for wildfires and agricultural fires in the United States
	Tomsche, Laura; Piel, Felix; Mikoviny, Tomas; Nielsen, Claus J.; Guo, Hongyu; Campuzano-Jost, Pedro; Nault, Benjamin A.; Schueneman, Melinda K.; Jimenez, Jose L.; Halliday, Hannah; Diskin, Glenn; DiGangi, Joshua P.; Nowak, John B.; Wiggins, Elizabeth B.; Gargulinski, Emily; Soja, Amber J.; Wisthaler, Armin
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	2331
结束页码	2343
卷号	23 期号:4 页码:13
英文摘要	During the 2019 Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) study, the NASA DC-8 carried out in situ chemical measurements in smoke plumes emitted from wildfires and agricultural fires in the contiguous United States. The DC-8 payload included a modified proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) for the fast measurement of gaseous ammonia (NH3) and a high-resolution time-of-flight aerosol mass spectrometer (AMS) for the fast measurement of submicron particulate ammonium (NH4+ ). We herein report data collected in smoke plumes emitted from 6 wildfires in the Western United States, 2 prescribed grassland fires in the Central United States, 1 prescribed forest fire in the Southern United States, and 66 small agricultural fires in the Southeastern United States. Smoke plumes con-tained double to triple digit ppb levels of NH3. In the wildfire plumes, a significant fraction of NH3 had already been converted to NH4+ at the time of sampling (>= 2 h after emission). Substantial amounts of NH4+ were also detected in freshly emitted smoke from corn and rice field fires. We herein present a comprehensive set of emis-sion factors of NH3 and NHX, with NHX = NH3 +NH4+. Average NH3 and NHX emission factors for wildfires in the Western United States were 1.86 +/- 0.75 g kg-1 and 2.47 +/- 0.80 g kg-1 of fuel burned, respectively. Average NH3 and NHX emission factors for agricultural fires in the Southeastern United States were 0.89 +/- 0.58 and 1.74 +/- 0.92 g kg-1, respectively. Our data show no clear inverse correlation between modified combustion ef-ficiency (MCE) and NH3 emissions. The observed NH3 emissions were significantly higher than measured in previous laboratory experiments in the FIREX FireLab 2016 study.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000936009300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273164
作者单位	National Aeronautics & Space Administration (NASA); Universities Space Research Association (USRA); National Aeronautics & Space Administration (NASA); NASA Langley Research Center; Helmholtz Association; German Aerospace Centre (DLR); University of Oslo; University of Innsbruck; University of Colorado System; University of Colorado Boulder; University of Colorado System; University of Colorado Boulder; Aerodyne Research; United States Environmental Protection Agency; National Institute for Aerospace
推荐引用方式 GB/T 7714	Tomsche, Laura,Piel, Felix,Mikoviny, Tomas,et al. Measurement report: Emission factors of NH3 and NHx for wildfires and agricultural fires in the United States[J],2023,23(4):13.
APA	Tomsche, Laura.,Piel, Felix.,Mikoviny, Tomas.,Nielsen, Claus J..,Guo, Hongyu.,...&Wisthaler, Armin.(2023).Measurement report: Emission factors of NH3 and NHx for wildfires and agricultural fires in the United States.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(4),13.
MLA	Tomsche, Laura,et al."Measurement report: Emission factors of NH3 and NHx for wildfires and agricultural fires in the United States".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.4(2023):13.