气象与环境学报2025，Vol.41Issue(3)：68-75,8.DOI:10.3969/j.issn.1673-503X.2025.03.009
一次准静止组织形态对流系统引起的暴雨过程分析
A case study on the heavy precipitation caused by a quasi-stationary mesoscale convective system
摘要
Abstract
A heavy precipitation process in the Hetao area of Inner Mongolia on 13 August 2022 was studied using radar,surface observations,sounding data and ERA5 reanalysis data in this paper.The results indicate that the pre-cipitation was mainly caused by a quasi-static mesoscale convective system,which was characterized by the contin-uous formation of east-west linear convections in the south of the Yin Mountain and the movement to the north-east,resulting in long-lasting heavy precipitation in the Hetao area.The subtropical high extended westward to in-land,forming a persistent southerly airflow in the southern Hetao area.This low-level water vapor could be contin-uously transported from the south or southeast channels to the Hetao area,forming a stable water vapor supply.The blocking effect of the Yin Mountains caused the water vapor to accumulate on the southern slopes of the mountain,leading to high convective available potential energy,which was conducive to the initiation and development of deep convection.Deflected by the trend of the Yin mountain,the easterly airflow turned to a northeasterly airflow.The convergence line formed by the northeasterly airflow and the southerly airflow provided uplifting for the initial convection.After the convection triggered,the northward diffusion of the cold pool was constrained by the mountains,which strengthened the cold pool and enhanced the cold pool to lift the southerly airflow with moisture,resulting in subsequent convections.Due to the stable water vapor transport of the southerly airflow,after the con-vection generated by the convergence in the southern mountain moving to the northeast,the warm and humid air-flow could continue to be lifted by the cold pool,which is generated by the previous convection and trigger new convections,thereby generating the quasi-stationary organized mesoscale convective system and ultimately resulting in heavy rainfall.关键词
中尺度对流系统/组织形态/后部增生/强降水/山地Key words
Mesoscale convective system/Organizational mode/Back-building/Heavy precipitation/Mountain分类
天文与地球科学引用本文复制引用
孙鑫,刘泓君,王国梁..一次准静止组织形态对流系统引起的暴雨过程分析[J].气象与环境学报,2025,41(3):68-75,8.基金项目
国家自然科学基金重点项目(42030604)和中央级公益性科研院所基本科研业务费专项基金青年项目(IUMKY202411)共同资助. （42030604）
