Trend analysis of urban heat island intensity according to urban area change in asian mega cities

Kyungil Lee, Yoonji Kim, Hyun Chan Sung, Jieun Ryu, Seong Woo Jeon

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Urban heat island (UHI) is a phenomenon that occurs in cities worldwide. Therefore, there is an increasing need for studies on the changes in UHI intensity and long-term trends based on macroscopic characteristics related to urbanization. In this study, changes in seasonal UHI intensity based on urban area were analyzed for eight Asian mega cities from 1992-2012. The results indicate that the change in pattern of UHI intensity varies for different cities and seasons. UHI intensity increased as the urban area size increased. Furthermore, the dependency of UHI intensity on the economic situation was also demonstrated. With respect to the seasons, significantly increasing trends appeared during the summer. Moreover, depending on urban characteristics such as geography and climate, increasing trends appeared during other seasons. Population was also found to affect UHI intensity by generating anthropogenic heat; however, its effect as an individual factor appeared to be insignificant. This is a macroscale study that analyzes the effect of urban area size on UHI intensity. Future studies on urbanization factors and levels influencing the UHI intensity using higher resolution materials are required.

Original languageEnglish
Article number112
JournalSustainability (Switzerland)
Issue number1
Publication statusPublished - 2020 Jan 1

Bibliographical note

Funding Information:
Funding: This research was supported by the Korea Environment Industry and Technology Institute (KEITI) grant (No. 2018000210006), funded by the Ministry of the Environment (MOE).

Publisher Copyright:
© 2019 by the authors.


  • Climate change
  • Global warming
  • Urban heat island
  • Urbanization

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Environmental Science (miscellaneous)
  • Energy Engineering and Power Technology
  • Management, Monitoring, Policy and Law


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