CAJ | 학술논문

利用常规观测资料以及雷达资料、地面加密自动站资料和NCEP1°×1°再分析资料，对2011年6月16日广东汕头龙卷天气的环境场特征及其与地面中小尺度系统的关系进行了分析，并对龙卷成因作了天气动力学探讨。结果表明：此次龙卷天气发生在极其有利的环境场中，其发生地区对流层中低层存在高能中心、强垂直风切变、强风速区（中层），此外中低层强的正水平螺旋度、深厚正涡度区、低层强辐合与高层强辐散配置也为龙卷发生提供了有利的环境条件；龙卷发生是天气尺度、中尺度和对流风暴尺度系统相互作用的结果；在丰富的涡源环境中，雷暴单体上的强回波强度梯度表明雷暴云团中存在强垂直运动梯度，而强垂直运动梯度是导致地面风场气旋性旋转迅速增强而产牛龙卷天气的重要原因。
이용상규관측자료이급뢰체자료、지면가밀자동참자료화NCEP1°×1°재분석자료，대2011년6월16일엄동산두룡권천기적배경장특정급기여지면중소척도계통적관계진행료분석，병대룡권성인작료천기동역학탐토。결과표명：차차룡권천기발생재겁기유리적배경장중，기발생지구대류층중저층존재고능중심、강수직풍절변、강풍속구（중층），차외중저층강적정수평라선도、심후정와도구、저층강복합여고층강복산배치야위룡권발생제공료유리적배경조건；룡권발생시천기척도、중척도화대류풍폭척도계통상호작용적결과；재봉부적와원배경중，뇌폭단체상적강회파강도제도표명뇌폭운단중존재강수직운동제도，이강수직운동제도시도치지면풍장기선성선전신속증강이산우룡권천기적중요원인。
Using conventional data, radar data, surface intensive automatic weather station observations and NCEP 6-hourly reanalysis data with resolution 1°×1°, a tornado process over Shantou on 16 June 2011 was studied including environment field characteristics and the rela- tionship between tornado and meso-and micro-scale systems on the ground, as well as the dynamic cause etc. The results indicate that the characters of circumstances in favor of tornado occurring in the lower and middle troposphere were： high energy center, strong vertical wind shear, strong wind in the middle troposphere, as well as strong positive horizontal helicity, thick positive vortieity zone and strong convergence in the low level coordinating with strong divergence in the high level. The interaction among synoptic scale, meso-scale and convective storm scale systems resulted in the occurrence of tornado. In the rich vortieity environment, strong echo intensity gradient in thunderstorm cell indi- cated strong vertical motion gradient in thunderstorm cloud clusters, while the strong vertical motion gradient was the main reason which led to the fast strengthening of the cyclonic rotation of surface wind to generate the tornado.