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Stronger exacerbation of hourly extreme rainfall by urbanization in a warming climate

Authors

Deng,  Zifeng
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Liao,  Yaoxing
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Wang,  Zhaoli
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Lai,  chengguang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Li,  Shanshan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zeng,  Zhaoyang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Wu,  Xushu
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Chen,  Yuhong
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Deng, Z., Liao, Y., Wang, Z., Lai, c., Li, S., Zeng, Z., Wu, X., Chen, Y. (2023): Stronger exacerbation of hourly extreme rainfall by urbanization in a warming climate, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4959


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021358
Abstract
The impacts of urbanization on extreme precipitation at multiple temporal scales under a warming climate remains uncertain. Here, using gauge-based observations and reanalysis data, we evaluate changes to hourly and daily extreme precipitation during 1981-2020 in urbanized Pearl River Delta, China. We find that hourly extreme precipitation in urban areas is more intense and frequent than surrounding rural areas, compared to daily extreme precipitation, which is also supported by the spatial distribution of trends with field significance test. Hourly extreme intensity increased nearly 50% faster than the daily intensity. Larger super-Clausius‐Clapeyron behavior in urban areas is observed in scaling of hourly extreme precipitation with dew-point temperature. Our analysis of atmospheric properties indicates that urban areas provide a more favorable environment for the development of hourly extreme precipitation than for that of the daily one, and that hourly extreme precipitation is more sensitive to urban-induced warming.