气候变化领域集成服务门户(CCPortal): Airborne and ground-based measurements of aerosol optical depth of freshly emitted anthropogenic plumes in the Athabasca Oil Sands Region

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DOI	10.5194/acp-21-10671-2021
	Airborne and ground-based measurements of aerosol optical depth of freshly emitted anthropogenic plumes in the Athabasca Oil Sands Region
	Baibakov K.; Leblanc S.; Ranjbar K.; O'Neill N.T.; Wolde M.; Redemann J.; Pistone K.; Li S.-M.; Liggio J.; Hayden K.; Chan T.W.; Wheeler M.J.; Nichman L.; Flynn C.; Johnson R.
发表日期	2021
ISSN	1680-7316
起始页码	10671
结束页码	10687
卷号	21 期号:13
英文摘要	In this work we report the airborne aerosol optical depth (AOD) from measurements within freshly emitted anthropogenic plumes arising from mining and processing operations in the Athabasca Oil Sands Region (AOSR) in the context of ground-based AERONET climatological daily averaged AODs at Fort McMurray (Alberta, Canada). During two flights on 9 and 18 June 2018, the NASA airborne 4STAR (Spectrometers for Sky-Scanning, Sun-Tracking Atmospheric Research) Sun photometer registered high fine-mode (FM, <1μm) in-plume AODs of up to 0.4 and 0.9, respectively, in the vicinity of the plume source (<20km). Particle composition shows that the plumes were associated with elevated concentrations of sulfates and ammonium. These high AODs significantly exceed climatological averages for June and were not captured by the nearby AERONET instrument (mean daily AODs of 0.10±0.01 and 0.07±0.02, maximum AOD of 0.12) due possibly to horizontal inhomogeneity of the plumes, plume dilution and winds which in certain cases were carrying the plume away from the ground-based instrument. The average 4STAR out-of-plume (background) AODs deviated only marginally from AERONET daily averaged values. While 4STAR AOD peaks were generally well correlated in time with peaks in the in situ-measured particle concentrations, we show that differences in particle size are the dominant factor in determining the 4STAR-derived AOD. During the two flights of 24 June and 5 July 2018 when plumes likely travelled distances of 60km or more, the average 4STAR FM AOD increased by 0.01-0.02 over 1/450km of downwind particle evolution, which was supported by the increases in layer AODs calculated from the in situ extinction measurements. Based on these observations as well as the increases in organic mass, we attribute the observed AOD increase, at least in part, to secondary organic aerosol formation. The in-plume and out-of-plume AODs for this second pair of flights, in contrast to clear differences in in situ optical and other measurements, were practically indistinguishable and compared favourably to AERONET within 0.01-0.02 AOD. This means that AERONET was generally successful in capturing the background AODs, but missed some of the spatially constrained high-AOD plumes with sources as close as 30-50km, which is important to note since the AERONET measurements are generally thought to be representative of the regional AOD loading. The fact that industrial plumes can be associated with significantly higher AODs in the vicinity of the emission sources than previously reported from AERONET can potentially have an effect on estimating the AOSR radiative impact. © Copyright:
语种	英语
scopus关键词	AERONET; aerosol property; airborne survey; anthropogenic source; ground-based measurement; optical depth; particle size; photometer; Alberta; Athabasca Oil Sands; Canada; Alberta
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/246733
作者单位	Flight Research Laboratory, National Research Council Canada, Ottawa, Canada; Bay Area Environmental Research Institute, Moffett Field, CA, United States; NASA Ames Research Center, Moffett Field, CA, United States; Dépt. de Géomatique Appliquée, Centre d'Applications et de Recherches en Télédétection, Université de Sherbrooke, Sherbrooke, QC, Canada; School of Meteorology, University of Oklahoma, Norman, OK, United States; Air Quality Process Research Section, Environment and Climate Change Canada, Toronto, ON, Canada; College of Environmental Science and Engineering, Peking University, Beijing, 100871, China; Climate Chemistry Measurement and Research, Climate Research Division, Environment and Climate Change CanadaON, Canada; Canadian Space Agency, Saint-Hubert, Canada
推荐引用方式 GB/T 7714	Baibakov K.,Leblanc S.,Ranjbar K.,et al. Airborne and ground-based measurements of aerosol optical depth of freshly emitted anthropogenic plumes in the Athabasca Oil Sands Region[J],2021,21(13).
APA	Baibakov K..,Leblanc S..,Ranjbar K..,O'Neill N.T..,Wolde M..,...&Johnson R..(2021).Airborne and ground-based measurements of aerosol optical depth of freshly emitted anthropogenic plumes in the Athabasca Oil Sands Region.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(13).
MLA	Baibakov K.,et al."Airborne and ground-based measurements of aerosol optical depth of freshly emitted anthropogenic plumes in the Athabasca Oil Sands Region".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.13(2021).