气候变化领域集成服务门户(CCPortal): Profiling of formaldehyde, glyoxal, methylglyoxal, and CO over the Amazon: Normalized excess mixing ratios and related emission factors in biomass burning plumes

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DOI	10.5194/acp-20-12363-2020
	Profiling of formaldehyde, glyoxal, methylglyoxal, and CO over the Amazon: Normalized excess mixing ratios and related emission factors in biomass burning plumes
	Kluge F.; Hüneke T.; Knecht M.; Lichtenstern M.; Rotermund M.; Schlager H.; Schreiner B.; Pfeilsticker K.
发表日期	2020
ISSN	1680-7316
起始页码	12363
结束页码	12389
卷号	20 期号:20
英文摘要	We report on airborne measurements of tropospheric mixing ratios and vertical profiles of formaldehyde (CH2O), glyoxal (C2H2O2), methylglyoxal and higher carbonyls (C3H4O∗ 2) (see below), and carbon monoxide (CO) over the Amazon Basin during the ACRIDICON-CHUVA campaign from the German High Altitude and Long-range research aircraft (HALO) in autumn 2014. The joint observation of in situ CO and remotely measured CH2O, C2H2O2, and C3H4O∗ 2, together with visible imagery and air mass back-trajectory modelling using NOAA HYSPLIT (National Oceanic Atmospheric Administration, HYbrid SingleParticle Lagrangian Integrated Trajectory), allows us to discriminate between the probing of background tropical air, in which the concentration of the measured species results from the oxidation of biogenically emitted volatile organic compounds (VOCs, mostly isoprene), and measurements of moderately to strongly polluted air masses affected by biomass burning emissions or the city plume of Manaus. For 12 nearsurface measurements of fresh biomass burning plumes, normalized excess mixing ratios of C2H2O2 and C3H4O∗ 2 with respect to CH2O are inferred and compared to recent studies. The mean glyoxal-to-formaldehyde ratio RGF D 0.07 (range 0.02 0.11) is in good agreement with recent reports which suggest RGF to be significantly lower than previously assumed in global chemical transport models (CTMs). The mean methylglyoxal-to-formaldehyde ratio RMF D 0.98 (range 0.09 1.50) varies significantly during the different observational settings but overall appears to be much larger (up to a factor of 5) than previous reports suggest even when applying a correction factor of 2.0 ± 0.5 to account for the additional dicarbonyls included in the C3H4O∗ 2 measurements. Using recently reported emission factors of CH2O for tropical forests, our observations suggest emission factors of EFG D 0.25 (range 0.11 to 0.52) g kg-1 for C2H2O2 and EFM = 4.7 (range 0.5 to 8.64) g kg-1 for C3H4O∗ 2. While EFG agrees well with recent reports, EFM is (like RMF) slightly larger than reported in other studies, presumably due to the different plume ages or fuels studied. Our observations of these critical carbonyls and intermediate oxidation products may support future photochemical modelling of air pollution over tropical vegetation, as well as validate past and present space-borne observations of the respective species. © 2020 Author(s).
语种	英语
scopus关键词	airborne survey; aldehyde; atmospheric plume; biomass burning; carbon monoxide; emission; formaldehyde; mixing ratio; vertical profile; Amazon Basin
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/247441
作者单位	Institute of Environmental Physics, University of Heidelberg, Heidelberg, Germany; Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Germany; Encavis AG, Hamburg, Germany; Ernst and Young, GmbH, Wirtschaftsprüfungsgesellschaft, Stuttgart, Germany
推荐引用方式 GB/T 7714	Kluge F.,Hüneke T.,Knecht M.,et al. Profiling of formaldehyde, glyoxal, methylglyoxal, and CO over the Amazon: Normalized excess mixing ratios and related emission factors in biomass burning plumes[J],2020,20(20).
APA	Kluge F..,Hüneke T..,Knecht M..,Lichtenstern M..,Rotermund M..,...&Pfeilsticker K..(2020).Profiling of formaldehyde, glyoxal, methylglyoxal, and CO over the Amazon: Normalized excess mixing ratios and related emission factors in biomass burning plumes.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(20).
MLA	Kluge F.,et al."Profiling of formaldehyde, glyoxal, methylglyoxal, and CO over the Amazon: Normalized excess mixing ratios and related emission factors in biomass burning plumes".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.20(2020).