气候变化领域集成服务门户(CCPortal): Biomass burning aerosol over the Amazon: analysis of aircraft; surface and satellite observations using a global aerosol model

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DOI	10.5194/acp-19-9125-2019
	Biomass burning aerosol over the Amazon: analysis of aircraft; surface and satellite observations using a global aerosol model
	Reddington C.L.; Morgan W.T.; Darbyshire E.; Brito J.; Coe H.; Artaxo P.; Scott C.E.; Marsham J.; Spracklen D.V.
发表日期	2019
ISSN	16807316
起始页码	9125
结束页码	9152
卷号	19 期号:14
英文摘要	Vegetation fires emit large quantities of aerosol into the atmosphere, impacting regional air quality and climate. Previous work has used comparisons of simulated and observed aerosol optical depth (AOD) in regions heavily impacted by fires to suggest that emissions of aerosol particles from fires may be underestimated by a factor of 2-5. Here we use surface, aircraft and satellite observations made over the Amazon during September 2012, along with a global aerosol model to improve understanding of aerosol emissions from vegetation fires. We apply three different satellite-derived fire emission datasets (FINN, GFED, GFAS) in the model. Daily mean aerosol emissions in these datasets vary by up to a factor of 3.7 over the Amazon during this period, highlighting the considerable uncertainty in emissions. We find variable agreement between the model and observed aerosol mass concentrations. The model reproduces observed aerosol concentrations over deforestation fires well in the western Amazon during dry season conditions with FINN or GFED emissions and during dry-wet transition season conditions with GFAS emissions. In contrast, the model underestimates aerosol concentrations over savanna fires in the Cerrado environment east of the Amazon Basin with all three fire emission datasets. The model generally underestimates AOD compared to satellite and ground stations, even when the model reproduces the observed vertical profile of aerosol mass concentration. We suggest it is likely caused by uncertainties in the calculation of AOD, which are as large as ĝ1/490 %, with the largest sensitivities due to uncertainties in water uptake and relative humidity. Overall, we do not find evidence that particulate emissions from fires are systematically underestimated in the Amazon region and we caution against using comparison with AOD to constrain particulate emissions from fires. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; airborne survey; atmospheric modeling; biomass burning; satellite imagery; vegetation; Amazonia
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/144274
作者单位	School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Centre of Atmospheric Sciences, School of Earth and Environmental Science, University of Manchester, Manchester, United Kingdom; Physics Institute, University of São Paulo, São Paulo, Brazil; Laboratoire de Météorologie Physique, Université Clermont Auvergne, Aubière, France
推荐引用方式 GB/T 7714	Reddington C.L.,Morgan W.T.,Darbyshire E.,et al. Biomass burning aerosol over the Amazon: analysis of aircraft; surface and satellite observations using a global aerosol model[J],2019,19(14).
APA	Reddington C.L..,Morgan W.T..,Darbyshire E..,Brito J..,Coe H..,...&Spracklen D.V..(2019).Biomass burning aerosol over the Amazon: analysis of aircraft; surface and satellite observations using a global aerosol model.Atmospheric Chemistry and Physics,19(14).
MLA	Reddington C.L.,et al."Biomass burning aerosol over the Amazon: analysis of aircraft; surface and satellite observations using a global aerosol model".Atmospheric Chemistry and Physics 19.14(2019).