Sustainable Cities and Society

11.7

2210-6707

101(2024)

SCIE

[논문]Urbanization influenced SUHI Of 41 megacities of the world using big geospatial data assisted with google earth engine

Muhammad Farhan Ul Moazzam

Byung Gul Lee

The rapid pace of urbanization with climate change pushed megacities into the forefront of human habitation,
emphasizing the urgent need to unravel the relationship between urban expansion and environmental dynamics.
This study examines the Surface Urban Heat Island (SUHI) within the 41 megacities, to interpret the complex
relationship that emerges from the nexus of urbanization and climatic influence. Through a comprehensive
analysis, it has been observed that daytime and nighttime temperature is increasing particularly in Asian regions.
An interesting SUHI intensity emerges in all megacities of the world. The SUHI does vary greatly across the
megacities of the world. Similarly, the average daytime ocean/coastal cities SUHI (1.19 ◦ C) was higher than
inland cities (0.77 ◦ C) but at nighttime inland cities had a higher average SUHI (0.95 ◦ C) than ocean/coastal
cities (0.93 ◦ C). Notably, the findings illuminate the complex relationship between city size, elevation, and
location with inland and ocean/coastal cities. An inverse yet substantively significant relationship emerges be-
tween, city size, elevation, and SUHI magnitude. Our study delivers a positive but moderate correlation between
daytime and nighttime SUHI and population density (r2 = 0.3/r2 = 0.5, p<0.05). In summary, this study elevates
our understanding of SUHI phenomena. These insights are for well-informed urban policies and sustainable
development.

2023.12.03.

https://doi.org/10.1016/j.scs.2023.105095