闽西北山区一次致灾暴雨的特征分析  

Analysis on Characteristics of A Disaster Causing Rainstorm in the Mountainous Area of Northwest Fujian Province

作　　者：张尾兰 杨锋 嵇夏兰 Zhang Wei-lan(Taining Meteorological Bureau,Taining,Fujian 354400)

机构地区：[1]福建省泰宁县气象局,福建泰宁354400

出　　处：《农业灾害研究》2023年第11期183-185,共3页Journal of Agricultural Catastrophology

摘　　要：2016年5月8日闽西北山区出现了分散性特大暴雨天气过程,造成闽西北山区泰宁发生泥石流灾害。基于地面、高空常规气象观测资料、多普勒雷达、风廓线雷达、加密自动站等资料,分析了此次致灾暴雨过程特征。结果表明:(1)特大暴雨期间,西南急流显著,有静止锋切变维持和暖切南侧有明显的风速辐合,近地层有辐合线存在,高层抽吸特征明显,是典型的福建暴雨形势。(2)边界层有冷空气侵入,地形动力抬升和喇叭口地形收缩作用为特大暴雨形成提供很好的条件。(3)雷达组合反射率上有多个“列车效应”,最强降水时段,在风廓线上能看到明显的风速辐合,加密自动站上存在中尺度辐合,对暴雨有着较好的指示意义。On May 8,2016,a dispersive extremely heavy rainstorm weather process occurred in the mountainous area of northwest Fujian,resulting in a debris flow disaster in Taining,the mountainous area of northwest Fujian.Based on the conventional meteorological observation data,Doppler radar,wind profile radar,encrypted automatic station and other data,the characteristics of the disaster causing rainstorm process were studied.The results show that:(1) During the extremely heavy rainstorm,the southwest jet stream was significant,with static front shear maintenance and obvious wind speed convergence on the south side of the warm shear.There was convergence line in the near ground,and the upper level pumping characteristics were obvious,which was a typical rainstorm rainstorm situation.(2)The boundary layer was invaded by cold air,and the topographic dynamic uplift and bell mouth topographic contraction provide good conditions for the formation of extremely heavy rainstorm.(3) There were multiple “train effects” on the radar combined reflectivity.During the strongest precipitation period,obvious wind speed convergence can be seen on the wind profile.There is mesoscale convergence on the densified automatic station,which has a good indication for rainstorm.

关 键 词：暴雨 环流形势 地形 雷达 区域自动站 

分 类 号：P458.121.1[天文地球—大气科学及气象学]