| 环境场大尺度锋面系统与变性台风结构特征及其暴雨的形成 |
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| 引用本文： | 徐祥德,陈联寿,解以扬,程朝晖.环境场大尺度锋面系统与变性台风结构特征及其暴雨的形成[J].大气科学,1998,22(5):744-752. |
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| 作者姓名： | 徐祥德 陈联寿 解以扬 程朝晖 |
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| 作者单位： | 1.中国气象科学研究院,北京 100081 |
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| 摘 要： | 本文将登陆台风环境大尺度锋面系统动力、热力结构作为台风变性发展的关键影响因子。本文的分析研究揭示了变性台风半冷半暖的热力非对称结构，及其演变过程气压谷型、动能峰型、降水增幅特征形成的环境场影响因子。本文的数值试验表明，台风环境场斜压结构（锋面特征）可以显著地影响台风变性过程，并可导致台风中心气压呈“谷型”、动能“锋型”以及热力非对称结构特征。引起台风变性涡旋加强及其暴雨增幅现象或台风衰减、消亡。本文的数值试验证实了登陆台风变性发展的某些成因，某种程度揭示了中低纬度系统的相互作用的机理问题。
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| 关 键 词： | 锋面系统 变性台风 暴雨增幅 斜压结构 |
Typhoon Transition and Its Impact on Heavy Rain |
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| Xu Xiangde,Chen Lianshou,Xie Yiyang and Cheng Zhaohui.Typhoon Transition and Its Impact on Heavy Rain[J].Chinese Journal of Atmospheric Sciences,1998,22(5):744-752. |
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| Authors: | Xu Xiangde Chen Lianshou Xie Yiyang and Cheng Zhaohui |
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| Abstract: | The key factors that affect the development and transition of typhoons are the dynamical and thermal structures of large-scale fronts with the background of landing typhoons The analyses of this paper demonstrate typhoon's thermal asymmetric structures: the half cold and half warm, the surface pressure valley pattern, kinetic energy peak pattern and the character of the precipitation amplification during the typhoon's transition According to numerical experiments, the baroclinic structure of typhoon's environment can obviously affect the transition process of typhoon, leading to the formation of the pressure valley, kinetic energy peak pattern and thermal asymmetric structure in typhoon center Sometimes the transition typhoon vortex may strengthen and precipitation may reinforce, and sometimes typhoon may weaken or dissipate The numerical results in this paper explain the transition and development of the landing typhoon and show the mechanism of the interactions between mid- and low-latitudes |
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| Keywords: | front system transition typhoon heavy rainfall amplification baroclinic structure |
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