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Changes in Hourly Extreme Precipitation Over Eastern China From 1970 to 2019 Dominated by Synoptic‐Scale Precipitation

2021; American Geophysical Union; Volume: 48; Issue: 5 Linguagem: Inglês

10.1029/2020gl090620

1944-8007

Chan‐Pang Ng, Qinghong Zhang, Wenhong Li,

Tropical and Extratropical Cyclones Research

Abstract Because of its dense population, extreme precipitation, in particular hourly extreme precipitation (HEP), is receiving increasing attention from both academic and public bodies in eastern China. Based on a continuous 50‐year record of hourly precipitation and reanalysis data, we show here for the first time that changes in the HEP occurrence are dominated by changes in the duration of the Meiyu front system. Further analyses reveal that greater occurrence of HEP in northeastern China, the lower reach of Yangtze River, and southern China during the warm season is largely due to a longer duration of the post‐Meiyu I stage when Meiyu front stays in northern China and meridional circulation dominates the eastern coastal area of China. These results improve our understanding of the changing behavior of extreme rainfall in China and shed light on the prevention of flash floods.