高层冷涡对台风路径影响的数值模拟和动力分析  

NUMERICAL SIMULATION AND DYNAMIC ANALYSIS OF INFLUENCE OF UPPER-TROPOSPHERIC COLD VORTEX ON THE TRACK OF TYPHOON

作　　者：费亮[1] 李小凡[1] 

机构地区：[1]上海台风研究所,上海200030

出　　处：《应用气象学报》1992年第4期385-393,共9页Journal of Applied Meteorological Science

摘　　要：通过六层斜压干模式模拟了高层冷涡对台风运动的影响,并用涡度方程各动力项的诊断分析,证实了高层冷涡对台风运动的影响主要是通过改变台风中心周围的环流结构而达到的。分析还指出了总涡度倾向和台风运动的直接联系以及这种联系的持续稳定性。同时也发现总涡度倾向主要来自于涡度水平平流和散度场的贡献。说明台风运动主要由正压性动力因子控制。By six-level dry baroclinic model,the influences of upper-level cold vortex on the typhoonmotion are simulated.The diagnostic analyses are carried out by using vorticity equation.It isfound that the influence of upper-level cold vortex on typhoon motion is produced through chang-ing the circulation structure around typhoon center.The results also show that the motion is di-rectly related to total vorticity tendency,and this relationship is stable.Meanwhile,it is revealedthat total vorticity tendency mainly comes from the horizontal advection of vorticity and diver-gent term,which means that typhoon motion is controlled by barotropic dynamic factors.

关 键 词：冷涡 涡度 台风路径 正压性 散度场 台风中心 斜压 诊断分析 动力分析 动力因子 

分 类 号：P4[天文地球—大气科学及气象学]