气候变化领域集成服务门户(CCPortal): Perturbation of Urbanization to Earth's Surface Energy Balance

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DOI	10.1029/2020JD033521
	Perturbation of Urbanization to Earth's Surface Energy Balance
	Shen P.; Zhao S.; Ma Y.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	Urbanization, one of the most dramatic forms of land conversion, modifies local climatic environments and threatens human life and health. Here we use the space-for-time approach combined with satellite data to quantify the potential perturbation of surface energy balance and land surface temperature (LST) caused by urbanization at global scale. We estimate that collectively +2.4°C, +0.9°C, and +1.7°C potential changes for annual daytime, nighttime, and mean LST could be triggered when land surface converted from natural area to urban use, due primarily to the decline of latent heat during months from April to October (−23.9–−3.2 W m−2), and the reduced sensible heat and ground heat storage in other months (−5.2–−2.4 W m−2). Urbanization perturbation to surface energy balance and temperature exhibit conspicuous spatial heterogeneity (i.e., varying with latitude and climate zones) and temporal asymmetries (i.e., diurnal and seasonal: strong in summer daytime and weak in winter nighttime). These spatial-temporal variations are interrelated closely with local background climate-vegetation regimes, as indicated by strong correlations between urbanization perturbation to surface biophysical effects and precipitation, temperature, vegetation index across regions and months. Our findings provide empirical evidence that biophysical mechanisms of urbanization need to be considered in predicting future trajectories of climate change and local susceptibility of surface energy balance should be accounted for when evaluating urbanization effects and mitigating urban heat. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	background climate; global change; land surface temperature; surface energy balance; urbanization
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185306
作者单位	College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China; College of Atmospheric Sciences, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou University, Lanzhou, China; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Shen P.,Zhao S.,Ma Y.. Perturbation of Urbanization to Earth's Surface Energy Balance[J],2021,126(8).
APA	Shen P.,Zhao S.,&Ma Y..(2021).Perturbation of Urbanization to Earth's Surface Energy Balance.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Shen P.,et al."Perturbation of Urbanization to Earth's Surface Energy Balance".Journal of Geophysical Research: Atmospheres 126.8(2021).