| 斜压涡旋中的通风气流与热带气旋移动的关系 |
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| 引用本文： | 田永祥.斜压涡旋中的通风气流与热带气旋移动的关系[J].气象学报,1996,54(1):83-94. |
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| 作者姓名： | 田永祥 |
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| 作者单位： | 南京气象学院 |
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| 基金项目： | 国家“八五”科技攻关85－906－07－02－04项目 |
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| 摘 要： | 应用准地转斜压模式数值模拟了热带气旋的移动。将热带气旋的流场分解为轴对称分量和非对称分量，研究非对称流场中的通风气流矢量与热带气旋移动矢量的关系。数值试验结果表明：（１）在热带气旋的非对称流场中，不但有大尺度β涡旋，而且还有小尺度涡旋。（２）小尺度涡旋与大尺度β涡旋之间的相互作用导致热带气旋移向的摆动和移速的振荡。（３）应用Ｆｉｏｒｉｎｏ和Ｅｌｓｂｅｒｒｙ的方法计算的通风气流矢量与热带气旋移动矢量有很大偏差。（４）应用改进的方法计算的通风气流矢量与热带气旋移动矢量相关密切。
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| 关 键 词： | 斜压模式，热带气旋，通风气流 |
| 收稿时间： | 6/9/1993 12:00:00 AM |
| 修稿时间： | 8/1/1994 12:00:00 AM |
VENTILATION FLOW IN A BAROCLINIC VORTEX RELATED TO TROPICAL CYCLONE MOTION |
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| Tian Yongxiang.VENTILATION FLOW IN A BAROCLINIC VORTEX RELATED TO TROPICAL CYCLONE MOTION[J].Acta Meteorologica Sinica,1996,54(1):83-94. |
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| Authors: | Tian Yongxiang |
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| Institution: | Nanjing Institute of Meteorology. Nanjing. 210044 |
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| Abstract: | ropical cyclone motion is simulated numerically with a quasi-geostrophic baroclinic model. The flow field of tropical cyclone is decomposed into its axisymmetric and asymmetric components. The relation between the ventilation flow vector in asymmetric flow field and the motion vector of tropical cyclone is investigated. The results of numerical experiments indicate : (1) There are both large-scale beta gyres and small-scale gyres in the asymmetric flow field. (2) The interaction of the small-scale gyres with the largescale beta gyres leads to the oscillation of translation speed and the vacillation of translation direction for tropical cyclone. (3) The large deviation between the ventilation flow vector calculated applying Fiorino and Elsberry's method and the motion vector of tropical cyclone exists. (4) The correlation between the ventilation flow vector calculated applying the improved method and the motion vector of tropical cyclone is very close. |
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| Keywords: | Baroclinic model Tropical cyclone Ventilation flow |
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