Impacts of anthropogenic aerosols on fog in North China Plain

Jia, Xingcan; Quan, Jiannong; Zheng, Ziyan; Liu, Xiange; Liu, Quan; He, Hui; Liu, Yangang

doi:10.1029/2018JD029437

Title: Impacts of anthropogenic aerosols on fog in North China Plain

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Abstract

Abstract Fog poses a severe environmental problem in the North China Plain, China, which has been witnessing increases in anthropogenic emission since the early 1980s. This work first uses the WRF/Chem model coupled with the local anthropogenic emissions to simulate and evaluate a severe fog event occurring in North China Plain. Comparison of the simulations against observations shows that WRF/Chem well reproduces the general features of temporal evolution of PM _2.5 mass concentration, fog spatial distribution, visibility, and vertical profiles of temperature, water vapor content, and relative humidity in the planetary boundary layer throughout the whole period of the fog event. Sensitivity studies are then performed with five different levels of anthropogenic emission as model inputs to systematically examine the comprehensive impacts of aerosols on fog microphysical, macrophysical, radiative, and dynamical properties. The results show that as aerosol concentration increases, fog droplet number concentration and liquid water content all increase nonlinearly; but effective radius decreases. Macrophysical properties (fog fraction, fog duration, fog height, and liquid water path) also increase nonlinearly with increasing aerosol concentration, with rates of changes smaller than microphysical properties. Further analysis reveals distinct aerosol effects on thermodynamic and dynamical conditions during different stages of fog evolution: increasingmore »« less

Authors:

^[1];

^[2]; Zheng, Ziyan ^[3]; Liu, Xiange ^[4]; Liu, Quan ^[4]; He, Hui ^[4];

^[5]

Chinese Meteorological Administration, Beijing (China). Inst. of Urban Meteorology; Brookhaven National Lab. (BNL), Upton, NY (United States); Nanjing Univ. of Information Science and Technology (China). Key Lab. of Materials-Oriented Chemical Engineering (MCE)of Aerosol-Cloud-Precipitation of China Meteorological Administration
Chinese Meteorological Administration, Beijing (China). Inst. of Urban Meteorology
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Atmospheric Physics
Beijing Weather Modification Office, Beijing (China); Beijing Key Lab. of Cloud, Precipitation and Atmospheric Water Resources, Beijing (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Publication Date:: Fri Dec 07 00:00:00 EST 2018

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER); National Natural Science Foundation of China (NSFC)

OSTI Identifier:: 1484868

Alternate Identifier(s):: OSTI ID: 1786768

Report Number(s):: BNL-209645-2018-JAAM
Journal ID: ISSN 2169-897X

Grant/Contract Number:: SC0012704; 41505119

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Geophysical Research: Atmospheres

Additional Journal Information:: Journal Volume: 124; Journal Issue: 1; Journal ID: ISSN 2169-897X

Publisher:: American Geophysical Union

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; aerosols; fog; aerosol‐fog interactions; anthropogenic emission; WRF/Chem simulation

Citation Formats


                    Jia, Xingcan, Quan, Jiannong, Zheng, Ziyan, Liu, Xiange, Liu, Quan, He, Hui, and Liu, Yangang. Impacts of anthropogenic aerosols on fog in North China Plain.  United States: N. p., 2018. 
Web.  doi:10.1029/2018JD029437.

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                    Jia, Xingcan, Quan, Jiannong, Zheng, Ziyan, Liu, Xiange, Liu, Quan, He, Hui, & Liu, Yangang. Impacts of anthropogenic aerosols on fog in North China Plain.  United States.  https://doi.org/10.1029/2018JD029437

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                    Jia, Xingcan, Quan, Jiannong, Zheng, Ziyan, Liu, Xiange, Liu, Quan, He, Hui, and Liu, Yangang. Fri .  
"Impacts of anthropogenic aerosols on fog in North China Plain".  United States.  https://doi.org/10.1029/2018JD029437.  https://www.osti.gov/servlets/purl/1484868.

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@article{osti_1484868,

  title        = {Impacts of anthropogenic aerosols on fog in North China Plain},

  author       = {Jia, Xingcan and Quan, Jiannong and Zheng, Ziyan and Liu, Xiange and Liu, Quan and He, Hui and Liu, Yangang},

  abstractNote = {Abstract Fog poses a severe environmental problem in the North China Plain, China, which has been witnessing increases in anthropogenic emission since the early 1980s. This work first uses the WRF/Chem model coupled with the local anthropogenic emissions to simulate and evaluate a severe fog event occurring in North China Plain. Comparison of the simulations against observations shows that WRF/Chem well reproduces the general features of temporal evolution of PM 2.5 mass concentration, fog spatial distribution, visibility, and vertical profiles of temperature, water vapor content, and relative humidity in the planetary boundary layer throughout the whole period of the fog event. Sensitivity studies are then performed with five different levels of anthropogenic emission as model inputs to systematically examine the comprehensive impacts of aerosols on fog microphysical, macrophysical, radiative, and dynamical properties. The results show that as aerosol concentration increases, fog droplet number concentration and liquid water content all increase nonlinearly; but effective radius decreases. Macrophysical properties (fog fraction, fog duration, fog height, and liquid water path) also increase nonlinearly with increasing aerosol concentration, with rates of changes smaller than microphysical properties. Further analysis reveals distinct aerosol effects on thermodynamic and dynamical conditions during different stages of fog evolution: increasing aerosols invigorate fog formation and development by enhancing longwave‐induced instability, fog droplet condensation accompanying latent heat release, and thus turbulence, but delay fog dissipation by reducing surface solar radiation, surface sensible, and latent heat fluxes, and thus suppressing turbulence during the dissipation stage.},

  doi          = {10.1029/2018JD029437},

  journal      = {Journal of Geophysical Research: Atmospheres},

  number       = 1,

  volume       = 124,

  place        = {United States},

  year         = {Fri Dec 07 00:00:00 EST 2018},

  month        = {Fri Dec 07 00:00:00 EST 2018}

}

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