气候变化领域集成服务门户(CCPortal): Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean

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DOI	10.5194/acp-22-9859-2022
	Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean
	Harshvardhan, Harshvardhan; Ferrare, Richard; Burton, Sharon; Hair, Johnathan; Hostetler, Chris; Harper, David; Cook, Anthony; Fenn, Marta; Scarino, Amy Jo; Chemyakin, Eduard; Mueller, Detlef
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9859
结束页码	9876
卷号	22 期号:15 页码:18
英文摘要	Biomass burning in southwestern Africa produces smoke plumes that are transported over the Atlantic Ocean and overlie vast regions of stratocumulus clouds. This aerosol layer contributes to direct and indirect radiative forcing of the atmosphere in this region particularly during the months of August, September, and October. There was a multi-year international campaign to study this aerosol and its interactions with clouds. Here, we report on the evolution of aerosol distributions and properties as measured by the airborne high spectral resolution lidar (HSRL-2) during the ORACLES (Observations of Aerosols above Clouds and their intEractionS) campaign in September 2016. The NASA Langley HSRL-2 instrument was flown on the NASA ER-2 aircraft for several days in September 2016. Data were aggregated at two pairs of 2 degrees x 2 degrees grid boxes to examine the evolution of the vertical profile of aerosol properties during transport over the ocean. Results showed that the structure of the profile of aerosol extinction and microphysical properties is maintained over a 1 to 2 d timescale. In the 3-5 km altitude range, 95% of the aerosol extinction was contributed by particles in the 0.05-0.50 mu m radius size range with the aerosol in this size range having an average effective radius of 0.16 mu m. This indicates that there is essentially no scavenging or dry deposition at these altitudes. Moreover, there is very little day-today variation in these properties, such that time sampling as happens in such campaigns may be representative of longer periods such as monthly means. Below 3 km, there is considerable mixing with larger aerosol, most likely continental source near land. Furthermore, these measurements indicated that there was often a distinct gap between the bottom of the aerosol layer and cloud tops at the selected locations as evidenced by a layer of several hundred meters that contained relatively low aerosol extinction values above the clouds.
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:000835277500001
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/273298
作者单位	Purdue University System; Purdue University; Purdue University West Lafayette Campus; National Aeronautics & Space Administration (NASA); NASA Langley Research Center; National Aeronautics & Space Administration (NASA); NASA Langley Research Center; Science Systems and Applications Inc; University of Hertfordshire
推荐引用方式 GB/T 7714	Harshvardhan, Harshvardhan,Ferrare, Richard,Burton, Sharon,et al. Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean[J],2022,22(15):18.
APA	Harshvardhan, Harshvardhan.,Ferrare, Richard.,Burton, Sharon.,Hair, Johnathan.,Hostetler, Chris.,...&Mueller, Detlef.(2022).Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(15),18.
MLA	Harshvardhan, Harshvardhan,et al."Vertical structure of biomass burning aerosol transported over the southeast Atlantic Ocean".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.15(2022):18.