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本文从理论分析和数值模拟两方面探讨了热带气旋的非轴对称结构、β效应和环境流场对热带气旋运动的作用,同时对热带气旋运动的突变亦进行了研究、分析和模拟结果表明,在热带气旋发展的一定阶段,其非轴对称结构对自身运动的影响不可低估,在特定条件下,也可以导致热带气旋作蛇形或打转运动;在环境流场、β效应和非轴对称风、压场的相互作用达到一临界状况时,热带气旋的移向、移速将发生突变。 相似文献
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The impact of axiasymmetric structure of tropical cyclone, beta effect and the environmentalflow field on tropical cyclone motion have been investigated in terms of theoretical analysisand numerical modelling. The sudden change of tropical cyclone (TC) motion has also beenstudied. The analysis and modelling results indicate that the impact of axiasymmetric struc-ture of TC on its motion cannot be underestimated in the certain stage of TC development.Under the specified conditions, it may lead to snakelike or loop motion of TC. The movingdirection and speed of TC will change suddenly when the interaction of environmental flowfield, beta effect and axiasymmetric wind and pressure fields reach a critical state. 相似文献
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