气象与环境学报2025，Vol.41Issue(4)：48-57,10.DOI:10.3969/j.issn.1673-503X.2025.04.006
河南一次西南气流型暖区大暴雨成因分析
Cause analysis of a southwesterly airflow warm-sector heavy rainfall event in Henan
摘要
Abstract
Based on meteorological observation,radar data,satellite data and NCEP 1°×1° reanalysis data every 6h,using the methods of synoptic analysis and physical quantity diagnosis,the occurrence and development mecha-nism of southwesterly airflow warm-sector heavy rainstorm in the Huanghuai region of Henan Province in July 2017 was analyzed.The results show that the mainly influence system of the heavy rainfall is the low and medium level jet.The unstable energy comes from the dry and cold upper layer with the warm and wet lower layer.The water vapor convergence and transport is mainly located near and below 850 hPa or 925 hPa.The strong water va-por convergence between the low level and near-surface,and the surface mesoscale convergence line are important triggering mechanisms for warm-sector heavy rainfall.The obviously dynamic frontogenesis provides a strong up-ward movement for heavy rainfall.The coupling of high and low level jet is the mainly dynamic strengthening mechanism.The heavy rainfall occurred in the gradient area of the high and low centers of TBB or near the center of lower TBB values,and the area of TBB lower than 220 K have an important indication significance for the heavy rainstorm area above 100 mm;The echo of heavy precipitation presents the characteristics of backward propagation and quasi-stationary,and the echo has warm cloud echo precipitation structure with low centroid mean-while.关键词
西南气流型暖区暴雨/高空急流/低空急流/锋生函数/后向传播Key words
Southwesterly airflow warm-sector heavy rainfall/Upper-level jet/Low-level jet/Frontogenesis func-tion/Back propagation分类
天文与地球科学引用本文复制引用
LIANG Yu,HU Yanping,ZHANG Pu,ZHANG Yachun..河南一次西南气流型暖区大暴雨成因分析[J].气象与环境学报,2025,41(4):48-57,10.基金项目
河南省2024年科技攻关计划(242102320038)、中国气象局预报复盘总结专项(FPZJ2024-078)、河南省科技研发计划联合基金(232103810096)和中国气象局河南省农业气象保障与应用技术重点实验室应用技术研究基金面上项目(KM202343)共同资助. （242102320038）
