CAJ | 학술논문

提本文利用常规探测资料、多普勒天气雷达资料、自动站观测资料等对2013年3月27—28日发生在广西的一次飑线大风天气过程进行跟踪及监测预警，对其大尺度环流背景、雷达回波特征以及灾害性大风形成原因进行了较为详细的分析与研究。结果表明：此次飑线过程是由高空冷槽与地面高压后部形势所引起的；假相当位温、T-logp图等分析表明广西上空具有较好的热力、动力条件；地面辐合线触发初始对流活动；发展成熟的飑线地面气压场上存在雷暴高压、飑前低压和飑后低压等中尺度特征；飑线大风等灾害性天气出现在地面高压前侧气压梯度大值区和飑线的断裂处；雷达图像上中层径向辐合、反射率因子核心和中层风速大值区逐渐降低以及垂直风廓线图中低层风的转变等特征信息对地面大风天气临近预警有较好的指示意义；降水粒子的拖曳作用和飑线的快速移动都对地面大风的产生及增幅有一定的作用。
제본문이용상규탐측자료、다보륵천기뢰체자료、자동참관측자료등대2013년3월27—28일발생재엄서적일차박선대풍천기과정진행근종급감측예경，대기대척도배류배경、뢰체회파특정이급재해성대풍형성원인진행료교위상세적분석여연구。결과표명：차차박선과정시유고공랭조여지면고압후부형세소인기적；가상당위온、T-logp도등분석표명엄서상공구유교호적열력、동력조건；지면복합선촉발초시대류활동；발전성숙적박선지면기압장상존재뇌폭고압、박전저압화박후저압등중척도특정；박선대풍등재해성천기출현재지면고압전측기압제도대치구화박선적단렬처；뢰체도상상중층경향복합、반사솔인자핵심화중층풍속대치구축점강저이급수직풍곽선도중저층풍적전변등특정신식대지면대풍천기림근예경유교호적지시의의；강수입자적타예작용화박선적쾌속이동도대지면대풍적산생급증폭유일정적작용。
A squall line storm that stroke Guangxi severely in 27-28 March 2013 was traced and alerted based on various observation data collected by conventional meteorological radar,and automatic meteoro-logical stations,etc.This paper particularly analyzes the large scale circulation weather background,the characteristics of radar echo and formation mechanism of gale.The results show that this squall line is caused by the cold trough of high altitude and high pressure of ground.The good thermal and dynamic conditions over Guangxi are demonstrated on graphs of equivalent potential temperature and T-logp.Initial convection is triggered by the ground convergence line.Surface pressure field of matured squall line has the mesoscale features including thunderstorm high,depression before and after the squall.Disastrous weath-ers such as gale of squall usually appear in the area of big values of barometric gradient and the split part of squall line before ground high pressure.On the other hand,the information of radar,including midaltitude radial convergence (MARC),reflectivity core and middle-level greatest speed gradually decrease and the transition of the low-level wind show vertical wind profile chart,which could be well in indicating ground wind.Drag effect of precipitation particles and the fast moving squall line have certain effect on generation and growth of ground gale.