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景德镇一次罕见连续性大暴雨过程分析

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  • 万方数据
  • 维普
为了更好预报大暴雨过程，利用常规地面、高空观测资料、WebGis雷达拼图STI产品、ncep日平均再分析资料，对 2021 年 8 月中旬，景德镇地区出现的一次罕见大暴雨过程进行分析。结果表明，此次降水过程持续时间长，强度大，同期降水位居景德镇历史首位。强降水是在有利环境场中产生的，暖强迫下的风速辐合是造成 11-12 日降水产生的主要原因;13-14 日地面冷空气南下，大气斜压性增强，触发对流性强降水，导致连续性大暴雨天气的发生。雷达拼图上组合STI产品表明新老单体移向一致，重复经过景德镇和乐平市区，造成列车效应，最终导致大暴雨。副高较常年同期明显偏南、冷空气活动偏强偏南，导致冷暖空气强烈对峙，是造成景德镇中旬连续性大暴雨的主要原因。
Analysis of a Heavy Rainstorm Process in Jingdezhen
In order to predict the heavy rainstorm process,a rare heavy rainstorm process occurred in Jingdezhen in the middle of August 2021 was analyzed by using conventional ground and upper air observation data,WebGis radar puzzle STI products,and ncep daily average reanalysis data.The results showed that the precipitation process has a long duration and high intensity,and the precipi-tation in the same period ranks first in the history of Jingdezhen.Strong precipitation occurs in favor-able environmental fields,and the convergence of wind speeds under warm forcing is the main cause of precipitation from November to December;From 13th to 14th,the cold air on the ground moved southward,and the baroclinicity of the atmosphere increased,triggering convective heavy rainfall,leading to the occurrence of continuous heavy rainstorm.The combination of STI products on the ra-dar puzzle shows that the new and old monomers move in the same direction,repeatedly passing through Jingdezhen and Leping urban areas,causing the train effect and eventually leading to heavy rainstorm.Compared with the same period of the year,the subtropical high is obviously south,and the cold air activity is strong and south,leading to a strong confrontation between cold and warm air,which is the main reason for the continuous heavy rainstorm in the middle of Jingdezhen.

continuous heavy rainstormradar combination STIshort term heavy precipitationecho characteristics

盛梦婷、马中元、黄龙飞、陈鲍发、李燕玲

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乐平市气象局,333300,江西,乐平

江西省气象科学研究所,330046,南昌

景德镇市气象局,333000,江西,景德镇

连续性大暴雨 雷达组合STI 短时强降水 回波特征

中国科学院战略性先导科技专项(A类)国家自然科学基金项目江西省气象局 2020年面上项目江西省重点研发计划项目景德镇市科技计划项目

XDA1904020241975001JX2020M0520171BBG70052017NYSF002

2024

10.13990/j.issn1001-3679.2024.01.026

江西科学
江西省科学院

江西科学

影响因子：0.286
ISSN：1001-3679
年,卷(期)：2024.42(1)
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