CAJ | 학술논문

从高空环流和基本气流的演变对2010年第13号台风＂鲶鱼＂进入南海以后路径发生向北＂急翘＂的大环流形势进行分析,并应用wrf模式输出的高分辨率资料,对台风中心附近的风场、温度场和θse场的分布进行探讨,得出：＂鲇鱼＂进入南海后,路径发生向北＂急翘＂是由于青藏高压增强并向东移,致使其前部高空槽加深发展,切断了华南高压和副热带高压的联系,并使华南高压南落至中南半岛一带,使台风西行受阻,逐渐转为北移。同时越赤道气流的北涌,使基本气流从东北气流转为西南气流,北偏东移动趋势加大。500～700hPa两层引导气流与＂鲶鱼＂路径有很好的对应关系。最大风速区的水平和垂直结构将影响台风移动的路径,台风中心的有向风速低值区移动的趋势,最大风速区的垂直尺度的变化对台风移动有指导意义。温度场的水平和垂直分布也将影响台风的移动路径,西侧冷空气的入侵使台风偏西移动的趋势减弱,台风中心有向等厚度低值区移动的趋势。θse的高能舌的分布,有利台风向北或北偏东方向移动。
종고공배류화기본기류적연변대2010년제13호태풍＂염어＂진입남해이후로경발생향북＂급교＂적대배류형세진행분석,병응용wrf모식수출적고분변솔자료,대태풍중심부근적풍장、온도장화θse장적분포진행탐토,득출：＂점어＂진입남해후,로경발생향북＂급교＂시유우청장고압증강병향동이,치사기전부고공조가심발전,절단료화남고압화부열대고압적련계,병사화남고압남락지중남반도일대,사태풍서행수조,축점전위북이。동시월적도기류적북용,사기본기류종동북기류전위서남기류,북편동이동추세가대。500～700hPa량층인도기류여＂염어＂로경유흔호적대응관계。최대풍속구적수평화수직결구장영향태풍이동적로경,태풍중심적유향풍속저치구이동적추세,최대풍속구적수직척도적변화대태풍이동유지도의의。온도장적수평화수직분포야장영향태풍적이동로경,서측랭공기적입침사태풍편서이동적추세감약,태풍중심유향등후도저치구이동적추세。θse적고능설적분포,유리태풍향북혹북편동방향이동。
Basing on the upper air circulation and the evolution of the basic flow,the path abruptly northward turning after Typhoon No.13 of 2010＂Meigi＂entering the South China Sea was analyzed.Using data output from WRF mode,the distribution of wind field,temperature field and se were also analyzed.The results show that Qinghai-Xizang high enhances and eastward moves,resulting in the front upper trough development and cutting off the contact between South China High and Subtropical High.Cause the South China High moves southward to indo-china peninsula,Meigi＇s path abruptly changed from west to north.The cross-equatorial airflow northward rush,resulting in the northeast airflow turning to southwesterly airstream,which is conducive to typhoon ＂Meigi＂moving northeast.There is a good correspondence between the steering flow of 500 ～ 700 hPa and ＂Meigi＂path.The horizontal and vertical structure of the maximum wind region affect the path of the typhoon.The typhoon center tends to move to the small value area of wind speed.The vertical change of maximum wind,the horizontal and vertical distribution of temperature will guide typhoon movement.Typhoon center is inclined to the low value area of the height field.The cold air invasion of the west side（The distribution of high se value）makes typhoon moved west（north and northeast）trend weakening（strengthing）.