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Article

Impacts of Land Cover/Use on the Urban Thermal Environment: A Comparative Study of 10 Megacities in China

1
Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8572, Ibaraki, Japan
2
Institute of Ecological Civilization, Jiangxi University of Finance and Economics, Nanchang 330013, China
3
Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8572, Ibaraki, Japan
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(2), 307; https://doi.org/10.3390/rs12020307
Received: 10 December 2019 / Revised: 10 January 2020 / Accepted: 13 January 2020 / Published: 17 January 2020
(This article belongs to the Special Issue Geospatial Analysis of Urban Heat Island Phenomena in Megacities)
Satellite-derived land surface temperature (LST) reveals the variations and impacts on the terrestrial thermal environment on a broad spatial scale. The drastic growth of urbanization-induced impervious surfaces and the urban population has generated a remarkably increasing influence on the urban thermal environment in China. This research was aimed to investigate land surface temperature (LST) intensity response to urban land cover/use by examining the thermal impact on urban settings in ten Chinese megacities (i.e., Beijing, Dongguan, Guangzhou, Hangzhou, Harbin, Nanjing, Shenyang, Suzhou, Tianjin, and Wuhan). Surface urban heat island (SUHI) footprints were scrutinized and compared by magnitude and extent. The causal mechanism among land cover composition (LCC), population, and SUHI was also identified. Spatial patterns of the thermal environments were identical to those of land cover/use. In addition, most impervious surface materials (greater than 81%) were labeled as heat sources, on the other hand, water and vegetation were functioned as heat sinks. More than 85% of heat budgets in Beijing and Guangzhou were generated from impervious surfaces. SUHI for all megacities showed spatially gradient decays between urban and surrounding rural areas; further, temperature peaks are not always dominant in the urban core, despite extremely dense impervious surfaces. The composition ratio of land cover (LCC%) negatively correlates with SUHI intensity (SUHII), whereas the population positively associates with SUHII. For all targeted megacities, land cover composition and population account for more than 63.9% of SUHI formation using geographically weighted regression. The findings can help optimize land cover/use to relieve pressure from rapid urbanization, maintain urban ecological balance, and meet the demands of sustainable urban growth. View Full-Text
Keywords: Chinese megacity; land surface temperature (LST); land cover composition (LCC); population distribution; surface urban heat island (SUHI) Chinese megacity; land surface temperature (LST); land cover composition (LCC); population distribution; surface urban heat island (SUHI)
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MDPI and ACS Style

Liu, F.; Zhang, X.; Murayama, Y.; Morimoto, T. Impacts of Land Cover/Use on the Urban Thermal Environment: A Comparative Study of 10 Megacities in China. Remote Sens. 2020, 12, 307. https://doi.org/10.3390/rs12020307

AMA Style

Liu F, Zhang X, Murayama Y, Morimoto T. Impacts of Land Cover/Use on the Urban Thermal Environment: A Comparative Study of 10 Megacities in China. Remote Sensing. 2020; 12(2):307. https://doi.org/10.3390/rs12020307

Chicago/Turabian Style

Liu, Fei, Xinmin Zhang, Yuji Murayama, and Takehiro Morimoto. 2020. "Impacts of Land Cover/Use on the Urban Thermal Environment: A Comparative Study of 10 Megacities in China" Remote Sensing 12, no. 2: 307. https://doi.org/10.3390/rs12020307

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