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DOI	10.1016/j.atmosenv.2021.118253
	Impacts of urbanization on atmospheric circulation and aerosol transport in a coastal environment simulated by the WRF-Chem coupled with urban canopy model
	Kim G.; Lee J.; Lee M.-I.; Kim D.
发表日期	2021
ISSN	1352-2310
卷号	249
英文摘要	This study examines the impacts of urbanization on the local atmospheric circulation and the dispersion of air pollutants over the populated city of Ulsan, South Korea, located in the coastal region. Two experiments are conducted using the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) and the urban canopy model (UCM) at 1-km horizontal resolution. The model experiments are conducted in August for three consecutive years of 2016–2018, with an updated land use category and diurnally-varying surface emission and anthropogenic heat flux. The impacts of urbanization are isolated by comparing the control run (CTRL) with realistic land use conditions and the sensitivity run (NOURB) that replaces the urban surfaces with non-urban grasslands. CTRL reproduces the urban heat island (UHI) and associated wind patterns realistically with reliable local land-sea breeze circulations. The positive temperature anomalies develop over the urban area due to enhanced surface heat flux at the urban surfaces, driving low-level convergence and secondary circulation. Enhanced heating by UHI changes the ground-level aerosol concentration differently. While the concentration does not change significantly by UHI in the daytime, it is reduced considerably at night in the urban areas due to enhanced vertical mixing. The dominant process that the urbanization modifies the aerosol concentration is the thermodynamical effects, which are also supported by the observation. © 2021 Elsevier Ltd
关键词	Aerosol concentration Land-sea breeze Urban canopy model Urban heat island WRF-Chem
语种	英语
scopus关键词	Aerosols; Air pollution; Atmospheric chemistry; Atmospheric movements; Atmospheric temperature; Climatology; Coastal zones; Heat flux; Land use; Weather forecasting; Aerosol concentration; Anthropogenic heat flux; Atmospheric circulation; Coastal environments; Horizontal resolution; Secondary circulation; Temperature anomaly; Weather research and forecasting models; Urban transportation; aerosol; atmospheric circulation; coastal zone; heat flux; heat island; numerical model; simulation; urbanization; aerosol; air pollutant; article; canopy; case report; clinical article; coastal waters; forecasting; grassland; heat; heating; human; night; simulation; South Korea; urban area; urbanization; weather; South Korea; Ulsan [South Korea]; Ulsan [Ulsan (ADS)]
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248556
作者单位	Department of Urban and Environmental Engineering, Ulsan, South Korea; Physical Oceanography Division, National Oceanic and Atmospheric Administration/Atlantic Oceanographic and Meteorological Laboratory, MiamiFL, United States
推荐引用方式 GB/T 7714	Kim G.,Lee J.,Lee M.-I.,et al. Impacts of urbanization on atmospheric circulation and aerosol transport in a coastal environment simulated by the WRF-Chem coupled with urban canopy model[J],2021,249.
APA	Kim G.,Lee J.,Lee M.-I.,&Kim D..(2021).Impacts of urbanization on atmospheric circulation and aerosol transport in a coastal environment simulated by the WRF-Chem coupled with urban canopy model.ATMOSPHERIC ENVIRONMENT,249.
MLA	Kim G.,et al."Impacts of urbanization on atmospheric circulation and aerosol transport in a coastal environment simulated by the WRF-Chem coupled with urban canopy model".ATMOSPHERIC ENVIRONMENT 249(2021).