Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.11861/8638
Title: Comparative study of factors contributing to land surface temperature in high-density built environments in megacities using satellite imagery
Authors: Zeng, Frankie Fanjie 
Feng, Jiajun 
Zhang, Yuanzhi 
Tsou, Jin Yeu 
Xue, Tengfei 
Li, Yu 
Prof. LI Yi Man, Rita 
Issue Date: 2021
Source: Sustainability (Switzerland), 2021, Vol. 13(24), article no. 13706.
Journal: Sustainability (Switzerland) 
Abstract: In this study, the root sources contributing to the urban heat island (UHI) effect between megacities, such as Hong Kong and Shenzhen, were integrated and compared using satellite remote sensing data. Classification and multilayer perceptron regression tree (CARTMLP) algorithms were used to classify land use. The radiative transfer equation method was applied to retrieve the land surface temperatures (LSTs) in the study area. Multiple linear regression analysis was applied to determine the relationship between land-use types and UHIs. The experimental results show a large area of relatively high temperature dispersed within Shenzhen, and comparatively small areas highly centralized in Hong Kong, with the retrieved LST in Hong Kong lower than that in Shenzhen. In addition, the surface temperature of large complex buildings decorated with high-albedo materials in Hong Kong was higher than in Shenzhen (e.g., Hong Kong International Airport, 25.12◦C; Shenzhen Bao’an International Airport, 23.38◦C), with artificial heat being an important contributor to these differences. These results also imply that high-albedo materials are sufficient to alleviate high temperatures. These findings are integrated to propose an organic combination strategy for reducing UHI effects in urban areas in megacities worldwide, such as Hong Kong and Shenzhen in China. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Type: Peer Reviewed Journal Article
URI: http://hdl.handle.net/20.500.11861/8638
ISSN: 20711050
DOI: 10.3390/su132413706
Appears in Collections:Economics and Finance - Publication

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