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DOI	10.1016/j.buildenv.2021.108276
	On the mitigation potential and climatic impact of modified urban albedo on a subtropical desert city
	Mohammed, Afifa; Khan, Ansar; Santamouris, Mattheos
通讯作者	Santamouris, M (corresponding author), Univ New South Wales, Fac Built Environm, Sydney, NSW 2052, Australia.
来源期刊	BUILDING AND ENVIRONMENT
ISSN	0360-1323
EISSN	1873-684X
出版年	2021
卷号	206
英文摘要	Extreme urban heat alongside higher ambient temperatures in urban areas causes serious energy, comfort, health and environmental problems. The implementation of urban heat mitigation techniques can significantly reduce urban temperatures and counterbalance the impact of extreme urban heat. This study assesses the potential cooling ability of modified urban albedo strategies through the implementation of reflective and super reflective materials, as well as the global climatic impacts on a subtropical desert urban environment in Dubai, UAE. Three scenarios using low, average and high albedo modifications are designed and evaluated in parallel to a reference scenario. A physically-based mesoscale urban modeling system is used to assess the thermal and meteorological impacts of the albedo modifications during both the summer and winter seasons at a city scale. The reduction of ambient temperature during the peak of a summer day (14:00 LT) is shown to be 0.6 degrees C, 1.4 degrees C and 2.6 degrees C when urban albedo is increased by 0.20, 0.45 and 0.60 respectively. The winter cooling penalty ranges between 0.6 degrees C and 1.1 degrees C for the different albedo scenarios. The increase of the urban albedo also significantly reduces the planetary boundary layer (PBL) depth due to the loss of sensible heat and decreases the intensity of the convective mixing and advection flows from the desert to the city, improving the mitigation potential of the reflective materials; however this increases the risk of a higher pollutants concentration. A much higher mitigation potential is observed for the high-density parts of the city when compared to that of the low-density parts of the city. Irrespective of linear function in the drop of ambient temperature and changing fraction of global albedo, our results reported that the cooling potential of reflective materials is highly influenced by the climate, landscape, and urban characteristics of the cities.
英文关键词	Urban heat Cool materials Heat mitigation WRF-SLUCM PBL Desert city Dubai city
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000697704700001
WOS关键词	HEAT-ISLAND ; CUMULUS PARAMETERIZATION ; AMBIENT-TEMPERATURE ; ENERGY-CONSUMPTION ; MODEL ; IMPLEMENTATION ; TECHNOLOGIES ; CITIES
WOS类目	Construction & Building Technology ; Engineering, Environmental ; Engineering, Civil
WOS研究方向	Construction & Building Technology ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362747
作者单位	[Mohammed, Afifa; Santamouris, Mattheos] Univ New South Wales, Fac Built Environm, Sydney, NSW 2052, Australia; [Khan, Ansar] Univ Calcutta, Lalbaba Coll, Dept Geog, Howrah 711202, WB, India
推荐引用方式 GB/T 7714	Mohammed, Afifa,Khan, Ansar,Santamouris, Mattheos. On the mitigation potential and climatic impact of modified urban albedo on a subtropical desert city[J],2021,206.
APA	Mohammed, Afifa,Khan, Ansar,&Santamouris, Mattheos.(2021).On the mitigation potential and climatic impact of modified urban albedo on a subtropical desert city.BUILDING AND ENVIRONMENT,206.
MLA	Mohammed, Afifa,et al."On the mitigation potential and climatic impact of modified urban albedo on a subtropical desert city".BUILDING AND ENVIRONMENT 206(2021).