How do disparate urbanization and climate change imprint on urban thermal variations? A comparison between two dynamic cities in Southeast Asia

Journal article

Authors/Editors

Strategic Research Themes

Climate modeling (Earth System & Climate Change)

Publication Details

Author list: Nguyen, Can Trong; Chidthaisong, Amnat; Limsakul, Atsamon; Varnakovida, Pariwate; Ekkawatpanit, Chaiwat; Diem, Phan Kieu; Diep, Nguyen Thi Hong;

Publisher: Elsevier

Publication year: 2022

Journal acronym: SCS

Volume number: 82

Issue number: -

Start page: 1

End page: 13

Number of pages: 13

ISSN: 2210-6707

eISSN: 2210-6715

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85128171071&doi=10.1016%2fj.scs.2022.103882&partnerID=40&md5=c3701f1b18c2cd260c6a12c8b60a5588

Languages: English-Great Britain (EN-GB)

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Abstract

This study assessed the combined influences of climate change and urbanization on land surface temperature (LST) and surface urban heat island (SUHI) in the Bangkok metropolitan region (BKK) and Ho Chi Minh City metropolitan area (HCM) during 1990–2020. We found climate change evidence from trends and variations of temperature extremes in both cities throughout the past three decades, especially for the significant upward trends of nighttime temperature in HCM (0.23 – 0.3 °C/decade). These cities have been undergoing rapid urbanization, in which HCM has a higher urbanization rate with an annual growth rate of 8.03%/year against BKK (4.26%/year). Landscape metrics have rapidly shifted towards urban aggregation and green space fragmentation along with urbanization. A peer comparison shows that BKK holds a greater urban size and LST intensity, while HCM leads in urban growth and SUHI magnitude. These changes jointly contribute to climbing SUHI intensity, especially the dramatic influence of surface changes. Yet, temperature extremes also play an indispensable role in regulating SUHI magnitude, in which the impact in HCM is considerable compared to the effect in BKK. The research findings provide crucial information for both cities – where incorporation of climate change resilience strategies and SUHI mitigation into the master plans for livable cities are recommended. © 2022

Keywords

การเปลี่ยนแปลงสภาพภูมิอากาศ (Climate change)