Contrasting Trends and Drivers of Global Surface and Canopy Urban Heat Islands

被引：28

作者：

Du H. ^{[1
]}

Zhan W. ^{[1
,2
]}

Voogt J. ^{[3
]}

Bechtel B. ^{[4
]}

Chakraborty T.C. ^{[5
]}

Liu Z. ^{[1
]}

Hu L. ^{[6
]}

Wang Z. ^{[7
]}

Li J. ^{[1
]}

Fu P. ^{[8
]}

Liao W. ^{[9
]}

Luo M. ^{[9
]}

Li L. ^{[1
]}

Wang S. ^{[1
]}

Huang F. ^{[1
]}

Miao S. ^{[1
]}

机构：

[1] Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing

[2] Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing

[3] Department of Geography, Western University, London, ON

[4] Department of Geography, Ruhr-University Bochum, Bochum

[5] Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA

[6] Department of Atmospheric Science, University of Alabama in Huntsville, Huntsville, AL

[7] School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ

[8] Center for Environment, Energy, and Economy, Harrisburg, PA

[9] Guangdong Key Laboratory for Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou

来源：

Geophysical Research Letters | 2023年 / 50卷 / 15期

基金：

中国国家自然科学基金;

关键词：

background climate; canopy urban heat island; surface property; surface urban heat island; urban climate change;

D O I：

10.1029/2023GL104661

中图分类号：

学科分类号：

摘要：

A comprehensive comparison of the trends and drivers of global surface and canopy urban heat islands (termed Is and Ic trends, respectively) is critical for better designing urban heat mitigation strategies. However, such a global comparison remains largely absent. Using spatially continuous land surface temperatures and surface air temperatures (2003–2020), here we find that the magnitude of the global mean Is trend (0.19 ± 0.006°C/decade, mean ± SE) for 5,643 cities worldwide is nearly six-times the corresponding Ic trend (0.03 ± 0.002°C/decade) during the day, while the former (0.06 ± 0.004°C/decade) is double the latter (0.03 ± 0.002°C/decade) at night. Variable importance scores indicate that global daytime Is trend is slightly more controlled by surface property, while background climate plays a more dominant role in regulating global daytime Ic trend. At night, both global Is and Ic trends are mainly controlled by background climate. © 2023. The Authors.

引用

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