CAJ | 학술논문

1209号台风“苏拉”登陆福建后，暴雨主要分布在路径南侧。针对台风“苏拉”影响福建暴雨过程的特点，利用风廓线雷达、地面自动气象站和高空观测资料，结合 NCEP 再分析资料，对这次台风暴雨过程进行天气学分析和动力、热力特征诊断。结果表明：特定的高空环流使“苏拉”台风登陆福建前结构发生南倾。暴雨分布在路径南侧，是由于“苏拉”登陆后涡旋中心垂直轴线向南倾斜，使路径南侧对流层中、下层的差动温度平流和差动涡度平流加强；且南侧上下层的垂直风切变大，达到14 m ／s，利于对流不稳定层结发展和动力抬升增强；同时，在台风中心南侧温湿条件好，925hPa θse高值中心在福建中南部地区，达到359°k，而北侧在“苏拉”登陆前已受冷空气影响，温湿条件均不如南侧。
1209호태풍“소랍”등륙복건후，폭우주요분포재로경남측。침대태풍“소랍”영향복건폭우과정적특점，이용풍곽선뢰체、지면자동기상참화고공관측자료，결합 NCEP 재분석자료，대저차태풍폭우과정진행천기학분석화동력、열력특정진단。결과표명：특정적고공배류사“소랍”태풍등륙복건전결구발생남경。폭우분포재로경남측，시유우“소랍”등륙후와선중심수직축선향남경사，사로경남측대류층중、하층적차동온도평류화차동와도평류가강；차남측상하층적수직풍절변대，체도14 m ／s，리우대류불은정층결발전화동력태승증강；동시，재태풍중심남측온습조건호，925hPa θse고치중심재복건중남부지구，체도359°k，이북측재“소랍”등륙전이수랭공기영향，온습조건균불여남측。
After 1209 typhoon “Saola”landed in Fujian,precipitation area distributed mainly in the south of the track.Focusing on the characteristics of the rainstorm process of typhoon “SAOLA”in Fujian and using data from wind profilers,AWS observations and upper-air observations and combing with NCEP reanalysis data,we perform a synoptic analysis and diagnose the dynamic and thermal characteristics of the rainstorm process.Results show that the structure southward tilt before “Saola”landing in Fujian was caused by specific aerial circulation.The reason for the rainstorm area in the south of track was due to the vertical axis of vortex center tilt southward,so that the differential motions of thermal advection and vorticity advection between middle and lower level strengthened in the south of track and the vertical wind shear was strong between the upper and lower south (14 m /s),which were beneficial to the development of convective unstable stratification and the enhancement of dynamic lifting.Besides, temperature and humidity conditions were good in the south of typhoon center.Potential pseudo-equivalent temperature's high center at 925hPa (359°k)distributed in central and southern Fujian,while the north region of track was affected by cold air before “Saola”landed and temperature and humidity conditions were inferior to the south region of track.