| 一个β中涡对双台风相互作用影响的物理过程 |
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| 引用本文： | 代刊,罗哲贤,滕代高.一个β中涡对双台风相互作用影响的物理过程[J].南京气象学院学报,2008,31(4):494-502. |
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| 作者姓名： | 代刊 罗哲贤 滕代高 |
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| 作者单位： | 1. 南京信息大学江苏省气象灾害重点实验室,江苏,南京,210044
2. 南京信息大学遥感学院,江苏,南京,210044 |
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| 摘 要： | 利用高分辨率f平面正压拟谱模式，分析一个β中尺度涡对双台风相互作用影响的物理过程。结果表明：β中涡的存在可以使原本排斥的两个DeMaria型台风涡旋合并；β中涡改变双台风相互作用终态的物理机制是：初始时段处于某一台风涡旋正影响区内的β中涡，构成了非对称涡度场，进而在该台风涡旋内部产生指向另一个台风涡旋的气流。该气流如果足够强，则会使两个台风的中心距离在短时间内下降到合并临界距离之内，触发双涡合并过程的发生。
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| 关 键 词： | 双台风 涡合并 中尺度涡旋 非对称涡度场 |
Physical Process of Influences of a Meso-β Vortex on Binary Interaction of Typhoons |
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| DAI Kan,LUO Zhe-xian,TENG Dai-gao.Physical Process of Influences of a Meso-β Vortex on Binary Interaction of Typhoons[J].Journal of Nanjing Institute of Meteorology,2008,31(4):494-502. |
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| Authors: | DAI Kan LUO Zhe-xian TENG Dai-gao |
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| Institution: | DAI Kan, LUO Zhe-xian ,TENG Dai-gao (1. Jiangsu Key Laboratory of Meteorological Disaster ;2. School of Remote Sensing ,NUIST ,Nanjing 210044 ,China) |
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| Abstract: | By utilizing a high resolution f-plane barotropic pseudo-spectral model, the physical process of the influences of a meso-β vortex on the binary interaction of typhoons is analyzed. The results show that the meso-β vortex may alter the process of binary interaction and trigger a merging process. The physical mechanism by which the meso-β vortex can alter the final state of binary interaction is：when the meso-β vortex locates in the positive influencing area of one typhoon at the initial period time, an antisymmetric vorticity field comes into being and inspire airflows pointing to the other typhoon;and if those airflows are sufficient strong, they will make the two typhoons moving to each other and entering into the merging critical distance in a shorter time, which finally causes the mergence of the two typhoons. |
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| Keywords: | Binary typhoons vortex merging meso-scale vortex antisymmetric vorticity field |
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