2022年8月17—18日鄂尔多斯市大暴雨过程成因分析  

Cause Analysis of Heavy Rainstorm Process in Ordos from August 17 to 18,2022

作　　者：李昊宇 苏日娜[1] Li Hao-yu(Ordos Meteorological Bureau,Ordos,Inner Mongolia 017010)

机构地区：[1]鄂尔多斯市气象局,内蒙古鄂尔多斯017010

出　　处：《农业灾害研究》2023年第10期166-168,共3页Journal of Agricultural Catastrophology

摘　　要：利用常规气象观测资料和雷达ROSE 2.0资料,分析总结此次强降雨过程的降水实况特征及成因。结果表明:副高东退后维持,高空不断有冷空气注入,低空急流显著,冷暖空气交汇、层结极其不稳定,最强降雨时段落区与低层切变线及地面辐合线位置基本吻合。混合层状降水,较强回波维持在中部偏南地区长达8 h,最大降水回波达58 dBz,且从鄂尔多斯市西南部一直有回波补充,出现明显的“列车效应”,径向速度特征具有较好的指示意义。Using conventional meteorological observation data and radar ROSE 2.0 data,analyzed and summarize the precipitation characteristics and causes of this heavy rainfall process.The results showed that the subtropical high retreats to the east and maintains,with continuous injection of cold air in the upper air,significant low-level jet flow,and extremely unstable stratification of warm and cold air.The precipitation area during the strongest rainfall period was basically consistent with the position of the low-level shear line and the surface convergence line.Mixed layered precipitation,with strong echoes maintained in the central and southern regions for 8 hours,with a maximum precipitation echo of 58 dBz.Echoes have been replenished from the southwest of Ordos City,showing a significant“train effect”.The radial velocity characteristics have good indicative significance.

关 键 词：极端暴雨 地面辐合线 列车效应 

分 类 号：P458.121.1[天文地球—大气科学及气象学]