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Article

Differentiated Effects of Urbanization on Precipitation in South China

1
College of Ocean and Meteorology, South China Sea Institute of Marine Meteorology, Guangdong Ocean University, Zhanjiang 524088, China
2
Education Information Center, Guangdong Ocean University, Zhanjiang 524088, China
*
Author to whom correspondence should be addressed.
Academic Editor: David Dunkerley
Water 2021, 13(10), 1386; https://doi.org/10.3390/w13101386
Received: 22 April 2021 / Revised: 13 May 2021 / Accepted: 14 May 2021 / Published: 16 May 2021
(This article belongs to the Section Hydrology)
In this paper, precipitation data from the Tropical Rainfall Measuring Mission (TRMM), together with atmospheric reanalysis data, are employed to identify warm-season precipitation (1998–2014) changes and their association with rapid urbanization in south China. Three urban clusters (Chenyu, Yangtze Delta, and Fujian Guangdong coast) are focused. The results reveal that, for the inland Chengyu urban cluster, a lack of precipitation trend is likely due to insignificant trends in convective available potential energy (CAPE) and total column water vapor (TCWV). They are likely resulted from a reduced local moisture recycling in urban areas, balanced by an increased evapotranspiration of rural areas, together with a stable advection of water vapor input. For the Yangtze River Delta urban cluster, a negative trend in precipitation is associated with a slightly decreased CAPE and an increased TCWV, but is very likely related to urbanization induced an increased planetary boundary layer (PBL) and reduced land surface evaporation. For the Fujian Guangdong coast urban cluster, a marked positive precipitation trend is well explained by positive trends in CAPE and TCWV. The increased precipitation likely benefits from enhanced moisture recycling due to improved vegetation cover in rural areas, and enhanced advection moisture inputs due to urbanization along the coast. These results suggest urbanization effects on precipitation vary with regional conditions. In the coastal area, urbanization enhances sea breezes, which may benefit precipitation if sea breezes go along with the prevailing moisture. In inland area, urbanization likely leads to a warmer-dryer climate if large-scale land cover keeps stationary. View Full-Text
Keywords: urbanization; warm season precipitation; regional differentiation; south China urbanization; warm season precipitation; regional differentiation; south China
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MDPI and ACS Style

Fan, L.; Zhang, G.; Xu, J. Differentiated Effects of Urbanization on Precipitation in South China. Water 2021, 13, 1386. https://doi.org/10.3390/w13101386

AMA Style

Fan L, Zhang G, Xu J. Differentiated Effects of Urbanization on Precipitation in South China. Water. 2021; 13(10):1386. https://doi.org/10.3390/w13101386

Chicago/Turabian Style

Fan, Lingli, Guangya Zhang, and Jianjun Xu. 2021. "Differentiated Effects of Urbanization on Precipitation in South China" Water 13, no. 10: 1386. https://doi.org/10.3390/w13101386

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