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Title: Urbanization Effect on Winter Haze in the Yangtze River Delta Region of China

Abstract

The impact of urbanization-induced land-cover change and increase in anthropogenic emissions on the air quality of the megacity cluster of the Yangtze River Delta is investigated using the WRF-Chem model coupled with an urban canopy model at cloud-resolving resolution. The urban land-cover effect results in considerable reduction of near-surface aerosol concentrations over urban regions and an increase in particle concentrations at higher altitudes over the surrounding rural areas. The urban heat island effect increases the lower atmospheric instability and vertical velocity, thus increasing the planetary boundary layer height and ventilation over the urban area, favoring the dispersion of pollutants from urbanized areas to their immediate vicinities. However, the urbanization-induced increases in aerosol emissions outweigh that of land-cover change, resulting in a net increase in surface particle concentrations by up to 50 μg m-3 and the occurrence of winter haze by more than 10 d season-1 in the Yangtze River Delta region.

Authors:
 [1]; ORCiD logo [2];  [2]; ORCiD logo [3];  [2]; ORCiD logo [2];  [4]; ORCiD logo [5]; ORCiD logo [6]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Hohai Univ., Nanjing (China)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. School of Earth and Space Sciences, University of Science and Technology of China, Hefei China
  4. College of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing China
  5. Hohai Univ., Nanjing (China)
  6. Nanjing Univ. (China). School of Atmospheric Sciences
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1544247
Alternate Identifier(s):
OSTI ID: 1459240
Grant/Contract Number:  
2017B10614; 2017M611666; AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 13; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Zhong, Shi, Qian, Yun, Sarangi, Chandan, Zhao, Chun, Leung, Ruby, Wang, Hailong, Yan, Huiping, Yang, Tao, and Yang, Ben. Urbanization Effect on Winter Haze in the Yangtze River Delta Region of China. United States: N. p., 2018. Web. doi:10.1029/2018GL077239.
Zhong, Shi, Qian, Yun, Sarangi, Chandan, Zhao, Chun, Leung, Ruby, Wang, Hailong, Yan, Huiping, Yang, Tao, & Yang, Ben. Urbanization Effect on Winter Haze in the Yangtze River Delta Region of China. United States. https://doi.org/10.1029/2018GL077239
Zhong, Shi, Qian, Yun, Sarangi, Chandan, Zhao, Chun, Leung, Ruby, Wang, Hailong, Yan, Huiping, Yang, Tao, and Yang, Ben. Fri . "Urbanization Effect on Winter Haze in the Yangtze River Delta Region of China". United States. https://doi.org/10.1029/2018GL077239. https://www.osti.gov/servlets/purl/1544247.
@article{osti_1544247,
title = {Urbanization Effect on Winter Haze in the Yangtze River Delta Region of China},
author = {Zhong, Shi and Qian, Yun and Sarangi, Chandan and Zhao, Chun and Leung, Ruby and Wang, Hailong and Yan, Huiping and Yang, Tao and Yang, Ben},
abstractNote = {The impact of urbanization-induced land-cover change and increase in anthropogenic emissions on the air quality of the megacity cluster of the Yangtze River Delta is investigated using the WRF-Chem model coupled with an urban canopy model at cloud-resolving resolution. The urban land-cover effect results in considerable reduction of near-surface aerosol concentrations over urban regions and an increase in particle concentrations at higher altitudes over the surrounding rural areas. The urban heat island effect increases the lower atmospheric instability and vertical velocity, thus increasing the planetary boundary layer height and ventilation over the urban area, favoring the dispersion of pollutants from urbanized areas to their immediate vicinities. However, the urbanization-induced increases in aerosol emissions outweigh that of land-cover change, resulting in a net increase in surface particle concentrations by up to 50 μg m-3 and the occurrence of winter haze by more than 10 d season-1 in the Yangtze River Delta region.},
doi = {10.1029/2018GL077239},
journal = {Geophysical Research Letters},
number = 13,
volume = 45,
place = {United States},
year = {2018},
month = {7}
}

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