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Urbanization effect on winter haze in the Yangtze River Delta Region of China

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1029/2018GL077239· OSTI ID:1770381
 [1];  [2];  [2];  [3];  [2];  [2];  [4]; ;  [4]
  1. UNIVERSITY PROGRAMS
  2. BATTELLE (PACIFIC NW LAB)
  3. University of Science and Technology of China
  4. Nanjing University
+ Show Author Affiliations

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 (YRD) 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 UHI 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 YRD region.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1770381
Report Number(s):
PNNL-SA-135418
Journal Information:
Geophysical Research Letters, Vol. 45, Issue 13
Country of Publication:
United States
Language:
English

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Cited By (5)

East Asian Study of Tropospheric Aerosols and their Impact on Regional Clouds, Precipitation, and Climate (EAST‐AIR CPC ) December 2019
Modeling the Impacts of Urbanization on Summer Thermal Comfort: The Role of Urban Land Use and Anthropogenic Heat July 2019
Reviews and syntheses: influences of landscape structure and land uses on local to regional climate and air quality January 2019
Impact of urban canopy meteorological forcing on aerosol concentrations January 2018
Interaction Between Planetary Boundary Layer and PM2.5 Pollution in Megacities in China: a Review September 2019

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urbanization-induced land-cover change
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