| 高层冷涡对台风路径影响的数值模拟和动力分析 |
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| 引用本文： | 费亮,李小凡.高层冷涡对台风路径影响的数值模拟和动力分析[J].应用气象学报,1992,3(4):385-393. |
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| 作者姓名： | 费亮 李小凡 |
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| 作者单位： | 1.上海台风研究所 上海200030
(费亮)，上海台风研究所 上海200030(李小凡) |
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| 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。
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Numerical Simulation and Dynamic Analysis of Influence of Upper-Tropospheric Cold Vortex on the Track of Typhoon |
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| Institution: | (Shanghai Typhoon Institute, Shanghai, 200030) |
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| Abstract: | By six-level dry baroclinic model, the influences of upper-level cold vortex on the typyhoon motion are simulated. The diagnostic analyses are carried out by using vorticity equation. It is found that the influence of upper-level cold vortex on typhoon motion is produced through changing the circulation structure around typhoon center. The results also show that the motion is directly related to total vorticity tendency, and this relationship is stable. Meanwhile, it is revealed that total vorticity tendency mainly comes from the horizontal advection of vorticity and divergent term, which means that typhoon motion is controlled by barotropic dynamic factors. |
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