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DOI | 10.1088/1748-9326/ab6a23 |
Efficacy of cool roofs at reducing pedestrian-level air temperature during projected 21st century heatwaves in Atlanta, Detroit, and Phoenix (USA) | |
Broadbent, Ashley M.1,2; Krayenhoff, E. Scott1,2,3; Georgescu, Matei1,2,4 | |
2020-08-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | The air temperature cooling impacts of infrastructure-based adaptation measures in expanding urban areas and under changing climatic conditions are not well understood. We present simulations conducted with the Weather Research and Forecasting (WRF) model, coupled to a multi-layer urban model that explicitly resolves pedestrian-level conditions. Our simulations dynamically downscale global climate projections, account for projected urban growth, and examine cooling impacts of extensive cool roof deployment in Atlanta, Detroit, and Phoenix (USA). The simulations focus on heatwave events that are representative of start-, middle-, and end-of-century climatic conditions. Extensive cool roof implementation is projected to cause a maximum city-averaged daytime air temperature cooling of 0.38 degrees C in Atlanta; 0.42 degrees C in Detroit; and 0.66 degrees C in Phoenix. We propose a means for practitioners to estimate the impact of cool roof treatments on pedestrian-level air temperature, for a chosen roof reflectivity, with a new metric called the Albedo Cooling Effectiveness (ACE). The ACE metric reveals that, on average, cool roofs in Phoenix are 11% more effective at lowering pedestrian-level air temperature than in Atlanta, and 30% more effective than in Detroit. Cool roofs remain similarly effective under future heatwaves relative to contemporary heatwaves for Atlanta and Detroit, with some indication of increased effectiveness under future heatwaves for Phoenix. By highlighting the underlying factors that drive cooling effectiveness in a trio of cities located in different climatic regions, we demonstrate a robust framework for estimating the pedestrian-level cooling impacts associated with reflective roofs without the need for computationally demanding simulations. |
英文关键词 | urban climate heat mitigation cool roofs urban expansion climate change WRF cooling effectiveness |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000553505800001 |
WOS关键词 | URBAN HEAT-ISLAND ; CLIMATE-CHANGE ; EXTREME HEAT ; IMPACT ; MODEL ; MITIGATION ; WAVE ; ADAPTATION ; MORTALITY ; EXPANSION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/289406 |
专题 | 气候变化 |
作者单位 | 1.Arizona State Univ, Sch Geog Sci & Urban Planning, Tempe, AZ 85281 USA; 2.Arizona State Univ, Urban Climate Res Ctr, Tempe, AZ 85281 USA; 3.Univ Guelph, Sch Environm Sci, Guelph, ON, Canada; 4.Arizona State Univ, Global Inst Sustainabil, Tempe, AZ USA |
推荐引用方式 GB/T 7714 | Broadbent, Ashley M.,Krayenhoff, E. Scott,Georgescu, Matei. Efficacy of cool roofs at reducing pedestrian-level air temperature during projected 21st century heatwaves in Atlanta, Detroit, and Phoenix (USA)[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(8). |
APA | Broadbent, Ashley M.,Krayenhoff, E. Scott,&Georgescu, Matei.(2020).Efficacy of cool roofs at reducing pedestrian-level air temperature during projected 21st century heatwaves in Atlanta, Detroit, and Phoenix (USA).ENVIRONMENTAL RESEARCH LETTERS,15(8). |
MLA | Broadbent, Ashley M.,et al."Efficacy of cool roofs at reducing pedestrian-level air temperature during projected 21st century heatwaves in Atlanta, Detroit, and Phoenix (USA)".ENVIRONMENTAL RESEARCH LETTERS 15.8(2020). |
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