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DOI | 10.1175/JAS-D-18-0157.1 |
Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements | |
Liu, Quan1,2,3; Quan, Jiannong1; Jia, Xingcan1; Sun, Zhaobin1; Li, Xia2,3; Gao, Yang4; Liu, Yangang5 | |
2019 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:1页码:231-245 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Aerosol samples were collected over Beijing, China, during several flights in November 2011. Aerosol composition of nonrefractory submicron particles (NR-PM1) was measured by an Aerodyne compact time-of-flight aerosol mass spectrometer (C-ToF-AMS). This measurement on the aircraft provided vertical distribution of aerosol species over Beijing, including sulfate (SO4), nitrate (NO3), ammonium (NH4), chloride (Chl), and organic aerosols [OA; hydrocarbon-like OA (HOA) and oxygenated OA (OOA)]. The observations showed that aerosol compositions varied drastically with altitude, especially near the top of the planetary boundary layer (PBL). On average, organics (34%) and nitrate (32%) were dominant components in the PBL, followed by ammonium (15%), sulfate (14%), and chloride (4%); in the free troposphere (FT), sulfate (34%) and organics (28%) were dominant components, followed by ammonium (20%), nitrate (19%), and chloride (1%). The dominant OA species was primarily HOA in the PBL but changed to OOA in the FT. For sulfate, nitrate, and ammonium, the sulfate mass fraction increased from the PBL to the FT, nitrate mass fraction decreased, and ammonium remained relatively constant. Analysis of the sulfate-to-nitrate molar ratio further indicated that this ratio was usually less than one in the FT but larger than one in the PBL. Further analysis revealed that the vertical aerosol composition profiles were influenced by complex processes, including PBL structure, regional transportation, emission variation, and the aging process of aerosols and gaseous precursors during vertical diffusion. |
英文关键词 | Aerosols particulates Air pollution Atmospheric composition Urban meteorology |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000454684900004 |
WOS关键词 | POSITIVE MATRIX FACTORIZATION ; PLANETARY BOUNDARY-LAYER ; BULK RICHARDSON-NUMBER ; MASS-SPECTROMETER ; CHEMICAL-COMPOSITION ; HIGH-RESOLUTION ; ORGANIC AEROSOL ; COLLECTION EFFICIENCIES ; SUBMICRON PARTICLES ; MEXICO-CITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29576 |
专题 | 地球科学 |
作者单位 | 1.China Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China; 2.Beijing Weather Modificat Off, Beijing, Peoples R China; 3.Beijing Key Lab Cloud Precipitat & Atmospher Wate, Beijing, Peoples R China; 4.Chinese Acad Meteorol Sci, Weather Modificat Ctr, Beijing, Peoples R China; 5.Brookhaven Natl Lab, Upton, NY 11973 USA |
推荐引用方式 GB/T 7714 | Liu, Quan,Quan, Jiannong,Jia, Xingcan,et al. Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(1):231-245. |
APA | Liu, Quan.,Quan, Jiannong.,Jia, Xingcan.,Sun, Zhaobin.,Li, Xia.,...&Liu, Yangang.(2019).Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(1),231-245. |
MLA | Liu, Quan,et al."Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.1(2019):231-245. |
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