海洋气象学报2026，Vol.46Issue(4)：10-20,11.DOI:10.19513/j.cnki.hyqxxb.20260214002
2025年秋季河南致灾性连阴雨降水的极端性及其环流特征
Analysis on extremity and circulation characteristics of disastrous continuous overcast and rainy weather in Henan in autumn 2025
摘要
Abstract
In autumn 2025,disastrous continuous overcast and rainy weather occurred in Henan,which impacted agricultural production.Based on the daily precipitation data of national meteorological stations in Henan,western North Pacific subtropical high index,zonal circulation index,and other monitoring data as well as ERA5 reanalysis data,the precipitation and circulation characteristics during the continuous overcast and rainy weather are analyzed.The results are shown below.(1)This continuous overcast and rainy weather is characterized by long duration,short interval,frequent rainstorm processes and high cumulative precipitation.The two continuous overcast and rainy events in September last 10 d and 16 d,while the event in October lasts 21 d.There are 11 and 2 regional rainstorm days in September and October,with provincial average precipitation reaching 3.8 times and 3.4 times of the climatic state,which are the highest and second-highest values for the same period since 1961.(2)The abnormal characteristics of atmospheric circulations causing the continuous overcast and rainy weather are as follows.The large-scale circulations for this weather are the stable blocking high over the mid-high latitudes at 500 hPa and a relatively westward,northward and stronger subtropical high.The favorable upper-level divergence conditions are that,the South Asia high at 200 hPa exhibit both belt-like and eastern types,being more northward,eastward and stronger than the climatic state,and the East Asia subtropical westerly jet is more northward and stronger than the climatic state.(3)The vertically integrated water vapor flux and convergence in the troposphere are stronger than the climatic state for the same period,which provides abundant water vapor for the continuous rain.(4)The westward ridge point and the western ridge line of the western North Pacific subtropical high are more westward and northward than the climatic state,and the zonal circulation index is generally smaller than the climatic state.关键词
连阴雨/极端性/降水特征/环流特征Key words
continuous overcast and rainy weather/extremity/precipitation characteristics/circulation characteristics分类
天文与地球科学引用本文复制引用
梁钰,董俊玲,张亚春,吴毓洋,吴璐..2025年秋季河南致灾性连阴雨降水的极端性及其环流特征[J].海洋气象学报,2026,46(4):10-20,11.基金项目
河南省2024年科技公关计划项目(242102320038) （242102320038）
河南省2023年科技公关计划联合基金项目(232103810097) （232103810097）
河南省2024年科技公关计划联合基金项目(242103810093) （242103810093）
安阳国家气候观象台/鹤壁市农业气象与遥感重点实验室开放研究基金项目(AYNCOF202412) （AYNCOF202412）
海河流域气象科技创新项目(HHXM202409) （HHXM202409）
