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| Characteristics of a local extreme heavy rainfall in Santong River Basin |
| Wang Chuanhe, Wang Zhiyu, Cui Zhongqiang, Zhang Tong, Huang Xiaonan |
| Tonghua Meteorological Bureau of Jilin Province,Tonghua 134000 |
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Abstract This paper selects conventional meteorological observation data,ERA5 reanalysis data,Fengyun satellite and radar products in the Santong River Basin to analyze the local extreme rainstorm process in Gaotai Village,Liuhe County,Tonghua City from June 29,2022 to June 30,2022.The results indicate that this extreme precipitation occurred in the background of a deep high-altitude trough and was influenced by strong low-level cyclonic shear.It was triggered by the low-level warm and humid shear behind the subtropical high in the early environment with better warm and humid conditions in the warm zone.The deep water vapor saturation layer in the middle and lower levels and the increase of unstable energy provide water vapor and dynamic conditions for the continuation of extreme rainstorm,which is manifested as a strong "train effect".The research results are intended to provide some reference for the short-term approaching early warning of local rainstorm.
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Received: 16 July 2024
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2024, Vol. 41 
