2023年4月闽南沿海一次暖区暴雨过程中尺度分析  

Mesoscale Analysis on a Warm Rainstorm Process in Coastal Area of Southern Fujian in April 2023

作　　者：张凌艺 曾进 李育乔 ZHANG Lingyi;ZENG Jin;LI Yuqiao(Longwen District Meteorological Bureau of Zhangzhou City,Zhangzhou Fujian 363005)

机构地区：[1]漳州市龙文区气象局,福建漳州363005

出　　处：《现代农业科技》2024年第5期135-138,146,共5页Modern Agricultural Science and Technology

摘　　要：本文利用常规和非常规资料对2023年4月18日闽南沿海地区一次特大暴雨过程进行了中尺度特征分析和研究。结果表明:此次特大暴雨过程是副高北抬和南风暖湿气流强迫背景下形成的强对流天气,东南季风绕过台湾省形成地形高压,南海水汽通道建立与弱冷空气触发是此次过程的降水机制。“列车效应”在雷达图中表现突出,针对区域性冷空气的入侵,风廓线雷达资料较常规资料更精细,地形正面阻挡对边界层偏南急流造成的暖区暴雨大值落区判断有指示意义。This paper used conventional and unconventional data to analyze and study the mesoscale characteristics of a very heavy rainstorm process in the coastal area of southern Fujian on April 18,2023.The results showed that this very heavy rainstorm process was a strong convective weather formed under the background of the northward uplift of the subtropical high and the southerly warm moisture flow.The southeast monsoon bypassed Taiwan Province to form a topographic high.The establishment of the South China Sea water vapor channel and the triggering of weak cold air were the precipitation mechanisms of this process.The"train effect"was prominent in the radar map.In response to the intrusion of regional cold air,wind profile radar data was more refined than conventional data.The terrain frontal blocking had indicative significance for the estimation of the large value of the warm rainstorm caused by the southerly jet in boundary layer.

关 键 词：暖区暴雨 边界层偏南急流 风廓线 闽南沿海 2023年4月 

分 类 号：P458.121.1[天文地球—大气科学及气象学]