气候变化领域集成服务门户(CCPortal): Observations of supermicron-sized aerosols originating from biomass burning in southern Central Africa

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DOI	10.5194/acp-21-14815-2021
	Observations of supermicron-sized aerosols originating from biomass burning in southern Central Africa
	Miller R.M.; McFarquhar G.M.; Rauber R.M.; O'Brien J.R.; Gupta S.; Segal-Rozenhaimer M.; Dobracki A.N.; Sedlacek A.J.; Burton S.P.; Howell S.G.; Freitag S.; Dang C.
发表日期	2021
ISSN	1680-7316
起始页码	14815
结束页码	14831
卷号	21 期号:19
英文摘要	During the 3 years of the ObseRvations of Aerosols above CLouds and their intEractionS (ORACLES) campaign, the NASA Orion P-3 was equipped with a 2D stereo (2D-S) probe that imaged particles with maximum dimension (D) ranging from 10D1280μm. The 2D-S recorded supermicron-sized aerosol particles (SAPs) outside of clouds within biomass burning plumes during flights over the southeastern Atlantic off Africa's coast. Numerous SAPs with 10D1520μm were observed in 2017 and 2018 at altitudes between 1230 and 4000m, 1000km from the coastline, mostly between 7-11 S. No SAPs were observed in 2016 as flights were conducted further south and further from the coastline. Number concentrations of refractory black carbon (rBC) measured by a single particle soot photometer ranged from 200 to 1200cm-3 when SAPs were observed. Transmission electron microscopy images of submicron particulates, collected on Holey carbon grid filters, revealed particles with potassium salts, black carbon (BC), and organics. Energy-dispersive X-ray spectroscopy spectra also detected potassium, a tracer for biomass burning. These measurements provided evidence that the submicron particles originated from biomass burning. NOAA Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) 3d back trajectories show a source in northern Angola for times when large SAPs were observed. Fire Information for Resource Management System (FIRMS) Moderate Resolution Imaging Spectroradiometer (MODIS) 6 active fire maps showed extensive biomass burning at these locations. Given the back trajectories, the high number concentrations of rBC, and the presence of elemental tracers indicative of biomass burning, it is hypothesized that the SAPs imaged by the 2D-S are examples of BC aerosol, ash, or unburned plant material. © Copyright:
语种	英语
scopus关键词	aerosol; atmospheric plume; biomass burning; black carbon; concentration (composition); particle size; Angola
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/246532
作者单位	Department of Atmospheric Science, University of Illinois Champaign-Urbana, Urbana, IL, United States; Cooperative Institute of Mesoscale Meteorological Studies, University of Oklahoma, Norman, OK, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States; Department of Atmospheric Science, University of North Dakota, Grand Forks, ND, United States; Bay Area Environmental Research Institute/NASA Ames Research Center, Moffett Field, Mountain View, CA, United States; Department of Geophysics, Porter School of Environmental and Earth Science, Tel Aviv University, Tel Aviv, Israel; Department of Atmospheric Sciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Department of Environmental and Climate Sciences, Brookhaven National Laboratory, Upton, NY, United States; Science Directorate, NASA Langley Research Center, Hampton, VA, United States; Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, HI, United S...
推荐引用方式 GB/T 7714	Miller R.M.,McFarquhar G.M.,Rauber R.M.,et al. Observations of supermicron-sized aerosols originating from biomass burning in southern Central Africa[J],2021,21(19).
APA	Miller R.M..,McFarquhar G.M..,Rauber R.M..,O'Brien J.R..,Gupta S..,...&Dang C..(2021).Observations of supermicron-sized aerosols originating from biomass burning in southern Central Africa.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Miller R.M.,et al."Observations of supermicron-sized aerosols originating from biomass burning in southern Central Africa".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).