气候变化领域集成服务门户(CCPortal): A numerical study of the urban green roof and cool roof strategies’ effects on boundary layer meteorology and ozone air quality in a megacity

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DOI	10.1016/j.atmosenv.2021.118702
	A numerical study of the urban green roof and cool roof strategies’ effects on boundary layer meteorology and ozone air quality in a megacity
	Zhong T.; Zhang N.; Lv M.
发表日期	2021
ISSN	1352-2310
卷号	264
英文摘要	Green roof and cool roof are two popular strategies to mitigate urban heat island especially in the summer time. The meteorological effect (cooling on the near surface temperature) of the two mitigation strategies has been proved by lots of studies while the environmental effect (effect on urban air quality) is still largely unknown. In this paper the WRF-Chem model coupled with a single layer urban canopy model is used to simulate three heat wave and heavy ozone pollution episodes in Shanghai, China. Sensitivity experiments of green roof and cool roof are carried out and the results show that both green roof and cool roof can effectively mitigate urban heat island, and their cooling efficiencies are similar even their cooling mechanisms are different. All of them can reduce the lasting time and area of high temperature and extreme hot, but the ozone pollution may become more serious. According to the different ambient wind field and ozone distribution, these three ozone pollution episodes can be divided into two conditions: urban dome and urban plume. The decrease of urban surface temperature can inhibit the turbulent activities and reduce the height of the boundary layer; the concentration of ozone in urban Zone A (below 750 m height) increases, but decreases in urban Zone B (750 m-2km height) for urban dome. By calculating the ozone fluxes at different heights, we find that the urban heat island circulation can transport surface ozone into city, horizontally; while in Zone B, the horizontal divergence transport ozone out of the city, and green roof and cool roof can decrease the temperature difference between urban and suburban, which can inhibit this ozone transportation of urban heat island circulation. © 2021 Elsevier Ltd
关键词	Cool roof Green roof Ozone pollution Urban atmosphere boundary layer WRF-Chem
语种	英语
scopus关键词	Air quality; Atmospheric temperature; Boundary layers; Domes; Roofs; Surface properties; Thermal pollution; Urban transportation; Cool roofs; Green roof; Megacities; Ozone pollution; Pollution episodes; Urban atmosphere boundary layer; Urban heat island; Urban heat island circulation; Urban zones; WRF/Chem; Ozone; ozone; air quality; atmospheric pollution; boundary layer; environmental effect; greenspace; heat island; heat wave; high temperature; megacity; meteorology; ozone; surface temperature; air quality; air temperature; Article; boundary layer; canopy; China; city; concentration (parameter); controlled study; cool roof; cooling; environmental impact; green roof; heat wave; high temperature; island (geological); meteorology; photochemistry; physical phenomena; plume; pollution; quantitative study; relative humidity; sensitivity analysis; simulation; suburban area; summer; surface property; urban area; wind speed; China; Shanghai
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/248231
作者单位	School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; National Meteorological Centre, China Meteorological Administration, Beijing, 10081, China
推荐引用方式 GB/T 7714	Zhong T.,Zhang N.,Lv M.. A numerical study of the urban green roof and cool roof strategies’ effects on boundary layer meteorology and ozone air quality in a megacity[J],2021,264.
APA	Zhong T.,Zhang N.,&Lv M..(2021).A numerical study of the urban green roof and cool roof strategies’ effects on boundary layer meteorology and ozone air quality in a megacity.ATMOSPHERIC ENVIRONMENT,264.
MLA	Zhong T.,et al."A numerical study of the urban green roof and cool roof strategies’ effects on boundary layer meteorology and ozone air quality in a megacity".ATMOSPHERIC ENVIRONMENT 264(2021).