New positive feedback mechanism between boundary layer meteorology and secondary aerosol formation during severe haze events
Abstract
Severe haze events during which particulate matter (PM) increases quickly from tens to hundreds of microgram per cubic meter in 1-2 days frequently occur in China. Although it has been known that PM is influenced by complex interplays among emissions, meteorology, and physical and chemical processes, specific mechanisms remain elusive. In this paper, a new positive feedback mechanism between planetary boundary layer (PBL), relative humidity (RH), and secondary PM (SPM) formation is proposed based on a comprehensive field experiment and model simulation. The decreased PBL associated with increased PM increases RH by weakening the vertical transport of water vapor; the increased RH in turn enhances the SPM formation through heterogeneous aqueous reactions, which further enhances PM, weakens solar radiation, and decreases PBL height. This positive feedback, together with the PM-Radiation-PBL feedback, constitutes a key mechanism that links PM, radiation, PBL properties (e.g. PBL height and RH), and SPM formation, This mechanism is self-amplifying, leading to faster PM production, accumulation, and more severe haze pollution.
- Authors:
-
[7];
[8]
- Beijing Weather Modification Office (China); China Meteorological Administration, Beijing (China). Inst. of Urban Meterorology
- China Meteorological Administration, Beijing (China). Inst. of Urban Meterorology
- China Meteorological Administration, Beijing (China). Inst. of Urban Meterorology; Brookhaven National Lab. (BNL), Upton, NY (United States)
- Lanzhou Univ. (China). College of Atmospheric sciences
- Beijing Weather Modification Office (China)
- Beijing Meteorological Bureau (China)
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Atmospheric Physics
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); Key Technologies R&D Program (China); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1433943
- Report Number(s):
- BNL-203517-2018-JAAM
Journal ID: ISSN 2045-2322
- Grant/Contract Number:
- SC0012704; 2017YFC0209604; 41505119; IUMKY201709
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Atmospheric chemistry; Environmental monitoring; haze; planetary boundary layer; secondary aerosol formation; feedback mechanism
Citation Formats
Liu, Quan, Jia, Xingcan, Quan, Jiannong, Li, Jiayun, Li, Xia, Wu, Yongxue, Chen, Dan, Wang, Zifa, and Liu, Yangang. New positive feedback mechanism between boundary layer meteorology and secondary aerosol formation during severe haze events. United States: N. p., 2018.
Web. doi:10.1038/s41598-018-24366-3.
Liu, Quan, Jia, Xingcan, Quan, Jiannong, Li, Jiayun, Li, Xia, Wu, Yongxue, Chen, Dan, Wang, Zifa, & Liu, Yangang. New positive feedback mechanism between boundary layer meteorology and secondary aerosol formation during severe haze events. United States. https://doi.org/10.1038/s41598-018-24366-3
Liu, Quan, Jia, Xingcan, Quan, Jiannong, Li, Jiayun, Li, Xia, Wu, Yongxue, Chen, Dan, Wang, Zifa, and Liu, Yangang. Tue .
"New positive feedback mechanism between boundary layer meteorology and secondary aerosol formation during severe haze events". United States. https://doi.org/10.1038/s41598-018-24366-3. https://www.osti.gov/servlets/purl/1433943.
@article{osti_1433943,
title = {New positive feedback mechanism between boundary layer meteorology and secondary aerosol formation during severe haze events},
author = {Liu, Quan and Jia, Xingcan and Quan, Jiannong and Li, Jiayun and Li, Xia and Wu, Yongxue and Chen, Dan and Wang, Zifa and Liu, Yangang},
abstractNote = {Severe haze events during which particulate matter (PM) increases quickly from tens to hundreds of microgram per cubic meter in 1-2 days frequently occur in China. Although it has been known that PM is influenced by complex interplays among emissions, meteorology, and physical and chemical processes, specific mechanisms remain elusive. In this paper, a new positive feedback mechanism between planetary boundary layer (PBL), relative humidity (RH), and secondary PM (SPM) formation is proposed based on a comprehensive field experiment and model simulation. The decreased PBL associated with increased PM increases RH by weakening the vertical transport of water vapor; the increased RH in turn enhances the SPM formation through heterogeneous aqueous reactions, which further enhances PM, weakens solar radiation, and decreases PBL height. This positive feedback, together with the PM-Radiation-PBL feedback, constitutes a key mechanism that links PM, radiation, PBL properties (e.g. PBL height and RH), and SPM formation, This mechanism is self-amplifying, leading to faster PM production, accumulation, and more severe haze pollution.},
doi = {10.1038/s41598-018-24366-3},
journal = {Scientific Reports},
number = 1,
volume = 8,
place = {United States},
year = {Tue Apr 17 00:00:00 EDT 2018},
month = {Tue Apr 17 00:00:00 EDT 2018}
}
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