| 南海海区热带气旋移速突变的分析 |
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| 引用本文： | 刘伯汉,林丽珊.南海海区热带气旋移速突变的分析[J].热带海洋学报,1992(2). |
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| 作者姓名： | 刘伯汉 林丽珊 |
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| 作者单位： | 广东省热带海洋气象研究所，广东省热带海洋气象研究所 广州 510080，广州 510080 |
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| 摘 要： | 应用天气学与动力学相结合的方法,分析发现:鞍型场、西风槽和双热带气旋形势是热带气旋移速突变的环流背景。在上述环流背景的条件下,涡度、涡度平流、流函数、850—200hPa垂直切变以及不对称配置的演变与热带气旋移速突变有超前相关;概括出的一些判据可供业务实践参考。
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| 关 键 词： | 热带气旋 移速突变 流函数切变 环境流场 涡度平流 南海 |
A DIAGNOSTIC ANALYSIS ON ABRUPT CHANGE IN MOVING SPEED OF TROPICAL CYCLONE OVER THE SOUTH CHINA SEA |
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| LIU Bohan LIN Lishan.A DIAGNOSTIC ANALYSIS ON ABRUPT CHANGE IN MOVING SPEED OF TROPICAL CYCLONE OVER THE SOUTH CHINA SEA[J].Journal of Tropical Oceanography,1992(2). |
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| Authors: | LIU Bohan LIN Lishan |
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| Abstract: | It is found that the surrounding fields with a saddle point, westerly trough or binary tropical storms are favourable to the sudden change in moving speed of tropical cyclones. Under the condition of the above surrounding fields, some leading correlation to such sudden changes have been revealed in the development of vorticity, vorticity advection, stream function and vertical wind shear between 850hPa and 200hPa, as well as in the evolution of asymmetric structure of storms Finally, some criteria which may be helpful to operational prediction have been suggested in this paper. |
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| Keywords: | Abrupt change in movement speed Shear of stream function Ambient flow field Vorticty advection Tropical cyclone South China Sea |
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