Comparative Study of Factors Contributing to Land Surface Temperature in High-Density Built Environments in Megacities Using Satellite Imagery

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
View graph of relations

Author(s)

  • Frankie Fanjie Zeng
  • Jiajun Feng
  • Yuanzhi Zhang
  • Tengfei Xue
  • Yu Li
  • Rita Yi Man Li

Detail(s)

Original languageEnglish
Article number13706
Journal / PublicationSustainability
Volume13
Issue number24
Online published12 Dec 2021
Publication statusPublished - Dec 2021
Externally publishedYes

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.

Research Area(s)

  • urban heat islands, megacities, high-density built environment, surface temperature, satellite images

Citation Format(s)

Comparative Study of Factors Contributing to Land Surface Temperature in High-Density Built Environments in Megacities Using Satellite Imagery. / Zeng, Frankie Fanjie; Feng, Jiajun; Zhang, Yuanzhi; Tsou, Jin Yeu; Xue, Tengfei ; Li, Yu; Li, Rita Yi Man.

In: Sustainability, Vol. 13, No. 24, 13706, 12.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review