Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements
Abstract
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 thatmore »
- Authors:
-
- China Meteorological Administration, Beijing (China). Inst. of Urban Meteorology; Beijing Key Lab. of Cloud, Precipitation, and Atmospheric Water Resources, Beijing (China); Beijing Weather Modification Office (China)
- China Meteorological Administration, Beijing (China). Inst. of Urban Meteorology
- Beijing Weather Modification Office, and Beijing Key Laboratory of Cloud, Precipitation, and Atmospheric Water Resources, Beijing (China)
- Chinese Academy of Meteorological Sciences, Beijing (China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1492765
- Report Number(s):
- BNL-210917-2019-JAAM
Journal ID: ISSN 0022-4928
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of the Atmospheric Sciences
- Additional Journal Information:
- Journal Volume: 76; Journal Issue: 1; Journal ID: ISSN 0022-4928
- Publisher:
- American Meteorological Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Liu, Quan, Quan, Jiannong, Jia, Xingcan, Sun, Zhaobin, Li, Xia, Gao, Yang, and Liu, Yangang. Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements. United States: N. p., 2019.
Web. doi:10.1175/JAS-D-18-0157.1.
Liu, Quan, Quan, Jiannong, Jia, Xingcan, Sun, Zhaobin, Li, Xia, Gao, Yang, & Liu, Yangang. Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements. United States. https://doi.org/10.1175/JAS-D-18-0157.1
Liu, Quan, Quan, Jiannong, Jia, Xingcan, Sun, Zhaobin, Li, Xia, Gao, Yang, and Liu, Yangang. Wed .
"Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements". United States. https://doi.org/10.1175/JAS-D-18-0157.1. https://www.osti.gov/servlets/purl/1492765.
@article{osti_1492765,
title = {Vertical Profiles of Aerosol Composition over Beijing, China: Analysis of In Situ Aircraft Measurements},
author = {Liu, Quan and Quan, Jiannong and Jia, Xingcan and Sun, Zhaobin and Li, Xia and Gao, Yang and Liu, Yangang},
abstractNote = {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.},
doi = {10.1175/JAS-D-18-0157.1},
journal = {Journal of the Atmospheric Sciences},
number = 1,
volume = 76,
place = {United States},
year = {Wed Jan 02 00:00:00 EST 2019},
month = {Wed Jan 02 00:00:00 EST 2019}
}
Web of Science
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