气候变化领域集成服务门户(CCPortal): Solar reflective pavements-A policy panacea to heat mitigation?

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DOI	10.1088/1748-9326/ab87d4
	Solar reflective pavements-A policy panacea to heat mitigation?
	Middel A.; Turner V.K.; Schneider F.A.; Zhang Y.; Stiller M.
发表日期	2020
ISSN	17489318
卷号	15 期号:6
英文摘要	Cities worldwide are piloting the use of solar reflective coatings on roads to mitigate the Urban Heat Island (UHI). Solar reflective pavement has been praised as simple, low-cost solution with a demonstrated ability to reduce surface temperature. Less well understood is the effect of solar reflective coatings on radiant heat, which influences human thermal exposure and comfort. We present the first biometeorological observations of solar reflective coating to investigate its thermal performance from a pedestrian perspective. Hourly transects were conducted in two Los Angeles neighborhoods with MaRTy, a mobile platform that measures air, surface, and mean radiant temperature. Transects were performed on July 30, 2019, a typical summer day with low wind speeds and maximum air temperature of 31 °C. The surface temperature of coated asphalt concrete was 4 °C to 6 °C lower than that of regular asphalt concrete, but coated surfaces reflected 118 Wm-2 more shortwave radiation on average and up to 168 Wm-2 more at noon. In the evening, MaRTy observed 20 to 30 Wm-2 of added reflected shortwave radiation on sidewalks next to the reflective pavement. Mean radiant temperature over reflective pavement was 4 °C higher during midday. Although air temperature was reduced by 0.5 °C in the afternoon, after-sunset cooling was negligible. Findings illustrate the benefits and disadvantages of reflective pavement with respect to various thermal performance metrics. Cities should weigh the tradeoffs of UHI mitigation, thermal exposure, implementation and maintenance costs, lifecycle, and other competing priorities in the context of space use. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	cool pavement; heat mitigation; pedestrian thermal exposure; urban heat island
语种	英语
scopus关键词	Asphalt concrete; Atmospheric temperature; Concretes; Costs; Life cycle; Reflective coatings; Surface properties; Low-cost solution; Maintenance cost; Mean radiant temperature; Short-wave radiation; Surface temperatures; Thermal exposure; Thermal Performance; Urban heat island; Pavements; air temperature; coating; concrete; heat island; mitigation; neighborhood; pavement; performance assessment; shortwave radiation; solar radiation; surface temperature; urban area; wind stress
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154005
作者单位	School of Arts Media and Engineering, Arizona State University, United States; School of Computing Informatics and Decision Systems Engineering, Arizona State University, United States; Urban Planning Department, Luskin School of Public Affairs, University of California, Los Angeles, United States; School of Sustainability, Arizona State University, United States; School of Geographical Sciences and Urban Planning, Arizona State University, United States; Department of Geography, Kent State University, United States
推荐引用方式 GB/T 7714	Middel A.,Turner V.K.,Schneider F.A.,et al. Solar reflective pavements-A policy panacea to heat mitigation?[J],2020,15(6).
APA	Middel A.,Turner V.K.,Schneider F.A.,Zhang Y.,&Stiller M..(2020).Solar reflective pavements-A policy panacea to heat mitigation?.Environmental Research Letters,15(6).
MLA	Middel A.,et al."Solar reflective pavements-A policy panacea to heat mitigation?".Environmental Research Letters 15.6(2020).