台风移速突变的数值研究

基金项目:

国家“八五”科技攻关项目85-906-07资助

A NUMERICAL STUDY ON THE ABRUPT CHANGE OF VELOCITY OF TROPICAL CYCLONE MOTION

摘要: 用准地转正压模式,在无环境气流的情况下,实施了8组时间积分大于5个模式日的试验。在模式大气台风移动的过程中,清楚地显示了移速突然变化的现象。台风移速突然变化与前期台风环流的非对称结构之间存在着密切的联系。最后分析了台风环流非规则结构对路径的影响。
- 台风 /
- 移动 /
- 突变 /
- 数值试验
Abstract: By using the quasi-geostrophic barotropical model. eight numerical experiments whose integration time is longer than five model days are performed in the case of the basic current being zero everywhere. The abrupt decrease of motional velocity of tropical cyclones is exhibited clearly in the model atmosphere, which is closely related with their initial asymmetric structures. The turning northward and then turning eastward of tropical cyclones are also shown, which correspond to their initial irregular structures.
- Tropical cyclone /
- Movement /
- Abrupt change /
- Numerical experiment