气候变化领域集成服务门户(CCPortal): Influence of projected climate change, urban development and heat adaptation strategies on end of twenty-first century urban boundary layers across the Conterminous US

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DOI	10.1007/s00382-021-05740-w
	Influence of projected climate change, urban development and heat adaptation strategies on end of twenty-first century urban boundary layers across the Conterminous US
	Brandi A.; Broadbent A.M.; Krayenhoff E.S.; Georgescu M.
发表日期	2021
ISSN	0930-7575
起始页码	587
结束页码	601
英文摘要	The urban environment directly influences Urban Boundary Layer (UBL) dynamics. Commonly proposed heat adaptation strategies focused on reducing the impacts of global change and urban induced warming are also expected to decrease the intensity of convective mixing thereby reducing UBL depth, with important consequences for air pollutant dilution and dispersion. We use 20-km grid spacing Regional Climate Model decadal scale simulations that account for end of twenty-first century greenhouse gas emissions, urban development and intensive and uniform implementation of a suite of heat adaptation strategies, to investigate the individual and combined impacts of such drivers on UBL dynamics over the Continental US (CONUS). Results indicate that combined impacts of climate change and urban development are expected to increase summer (JJA) daytime UBL height in the eastern CONUS. Heat adaptation strategies lead to a summer daytime UBL depth reduction of several hundred meters across CONUS regions, primarily as a consequence of reduced surface sensible heat fluxes and associated turbulence. Our results confirm that heat adaptation is expected to increase the static stability of both daytime and nighttime UBLs and decrease the magnitude of vertical winds, inducing stronger subsidence. In addition, the large geographical scale of our analysis indicates that adaptation impacts are greater inland and smaller over coastal cities. In Southern California, the adaptation induced increase in latent heat can counterbalance the projected decrease in UBL depth. Future work addressing these projected UBL impacts with convection permitting, high-resolution coupled atmosphere-chemistry simulations is needed to explicitly determine potential unintended consequences for urban air quality. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Climate change; Heat adaptation; UBL; Unintended consequences; Urban development
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183499
作者单位	School of Geographical Sciences and Urban Planning, Arizona State University, 975 S. Myrtle Ave., Fifth Floor, Tempe, AZ 85287-5302, United States; Urban Climate Research Center, Arizona State University, Tempe, AZ 85287, United States; School of Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada; Global Institute of Sustainability, Arizona State University, Tempe, AZ 85287, United States
推荐引用方式 GB/T 7714	Brandi A.,Broadbent A.M.,Krayenhoff E.S.,et al. Influence of projected climate change, urban development and heat adaptation strategies on end of twenty-first century urban boundary layers across the Conterminous US[J],2021.
APA	Brandi A.,Broadbent A.M.,Krayenhoff E.S.,&Georgescu M..(2021).Influence of projected climate change, urban development and heat adaptation strategies on end of twenty-first century urban boundary layers across the Conterminous US.Climate Dynamics.
MLA	Brandi A.,et al."Influence of projected climate change, urban development and heat adaptation strategies on end of twenty-first century urban boundary layers across the Conterminous US".Climate Dynamics (2021).