Contradictory influences of urbanization on intense convective rainfall in a subtropical city

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Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_7C0F4C269DD7
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Contradictory influences of urbanization on intense convective rainfall in a subtropical city
Journal
Environmental Research Letters
Author(s)
Zhuang Qi, Koukoula Marika, Liu Shuguang, Zhou Zhengzheng, Gao Lisha, Peleg Nadav
ISSN
1748-9326
Publication state
Published
Issued date
01/10/2024
Peer-reviewed
Oui
Volume
19
Number
10
Pages
104020
Language
english
Abstract
In light of the rapid growth in cities, there is a pressing need to explore how urbanization affects extreme weather, especially short-duration convective storms that can potentially trigger urban floods. Here we use a high-resolution Weather Research and Forecasting convection-permitting model to simulate 23 summer convective storms over the subtropical city of Shanghai, China. We simulated these events in three different scenarios: present urban, no-urban, and urban-expansion settings. Results show contradictory findings of urbanization's influence on convective rainfall, which is associated with urban-surroundings hydrothermal differences and diurnal cycles. Urban expansion further intensifies daytime convective rainfall when inhomogeneous temperature and moisture conditions between the city and its surroundings are present, whereas other conditions may suppress rainfall intensity. The findings provide the potential mechanisms of rainfall modification by urban expansion in subtropical cities, offering useful insights for urban planning and flood management in Shanghai and other rapidly urbanizing cities.
Open Access
Yes
Funding(s)
Swiss National Science Foundation / 194649
Create date
30/08/2024 14:31
Last modification date
07/09/2024 7:02
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