The Henan extreme rainfall in July 2021: Modulation of the northward-shift monsoon trough on the synoptic-scale wave train
作者机构：Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric SciencesFudan UniversityShanghai 200438China Institute of Eco-Chongming(IEC)Shanghai 200062China Innovation Center of Ocean and Atmosphere SystemZhuhai Fudan Innovation Research InstituteZhuhai 518057China Jiangsu Collaborative Innovation Center for Climate ChangeNanjing 210023China Zhumadian Meteorological OfficeZhumadian 463000China
出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)
年 卷 期：2022年第13卷第6期
页 面：819-825页
核心收录：
学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070601[理学-气象学] 0706[理学-大气科学]
基 金：National Natural Science Foundation of China(41875087,42030601 and 42105017) Applied Technology Research Fund of CMA·Henan Key Laboratory of Agrometeorological Support and Applied Technique(KQ202160)
主 题：Extreme rainfall Northern Central China Synoptic-scale wave train Monsoon trough Barotropic energy conversion
摘 要：The synoptic-scale wave train is a dominant pattern of the synoptic variability over the tropical western Pacific and usually affects the extreme weather over South China and Southeast *** it could extend its influence and contribute to the Henan extreme rainfall in July 2021 still needs to be *** found that during the Henan extreme rainfall days a positively synoptic-scale vorticity disturbance dominated Henan province,China,which was embedded in the synoptic-scale wave train that originated from the western North ***,the propagating pathway of this synoptic-scale wave train located northward and was likely modulated by the latitudinal location change of the monsoon trough over the western North Pacific.A northernmost displacement of the monsoon trough in July 2021(∼23.2°N)would facilitate the synoptic-scale wave train to propagate farther northwestward via shifting the related barotropic conversion ***,the synoptic-scale wave train from the tropics could reach Henan,provide the necessary lifting forcing,and supply abundant water vapor associated with the anomalous southerly for the occurrence of Henan extreme rainfall *** results implicate that the pre-existing synoptic-scale wave train regulated by the location of the monsoon trough may be a potential precursor for heavy rainfalls in northern Central China.
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