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• W3157138082 endingPage "112427" @default.
• W3157138082 startingPage "112427" @default.
• W3157138082 abstract "The urban morphology can significantly change the urban microclimate, which in turn affects the diffusion of air pollutants. Urban planning is the most important means of shaping urban morphology. Therefore, this study takes Wuhan as an example and uses the method of WRF/CMAQ coupled UCM model to analyze the spatial and temporal distribution characteristics of PM2.5 in the Wuhan metropolitan area in winter 2015. The six most important urban morphological indicators in urban planning: the floor area ratio and building height, building density and building width, vegetation coverage ratio, and urban fraction, are selected and classified into three groups. Studying their impact on the spatial and temporal distribution of PM2.5 concentration provides support for urban planners to improve air quality. The results show that the maximum value of PM2.5 concentration in Wuhan urban area occurs in the morning rush hour, and PM2.5 is distributed concentrically in the downtown of the city (within the second ring highway) according to the highways around the city. The PM2.5 concentration in the downtown area with the most extensive urban morphological index is the highest, and it decreases with increasing distance from the downtown. Among the six indicators, building density and urban fraction have the most significant impact on PM2.5 concentration because they have the greatest impact on the wind speed at 10 m. The height of the planetary boundary layer is the key factors affect the vertical and horizontal diffusion of air pollutants. Except for the vegetation coverage ratio, the increase of other urban morphological indicators will lead to a decrease of PM2.5 concentration in Wuhan urban area at night. During the daytime, increasing the floor area ratio and building height will cause an increasing of PM2.5 concentration, but other indicators have the opposite effects." @default.
• W3157138082 created "2021-05-10" @default.
• W3157138082 creator A5028657611 @default.
• W3157138082 creator A5041701240 @default.
• W3157138082 date "2021-07-01" @default.
• W3157138082 modified "2023-10-11" @default.
• W3157138082 title "Impact of urban morphology on the spatial and temporal distribution of PM2.5 concentration: A numerical simulation with WRF/CMAQ model in Wuhan, China" @default.
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• W3157138082 doi "https://doi.org/10.1016/j.jenvman.2021.112427" @default.
• W3157138082 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33895455" @default.
• W3157138082 hasPublicationYear "2021" @default.
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