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| 一次入海气旋快速发展的动力和热力学特征分析 | |
| 引用本文： | 朱营礼,周淑玲,林曲凤,吴增茂.一次入海气旋快速发展的动力和热力学特征分析[J].高原气象,2012,31(3):788-797. |
| 作者姓名： | 朱营礼 周淑玲 林曲凤 吴增茂 |
| 作者单位： | 1. 中国海洋大学海洋环境学院,山东青岛,266100 2. 威海市气象局,山东威海,264200 3. 烟台市气象局,山东烟台,264003 |
| 基金项目： | 国家自然科学基金项目，山东省气象局重点课题 |
| 摘 要： | 利用扩展Zwack-Okossi方程(扩展Z-O方程)对2007年3月3-5日黄、渤海海上快速发展的温带气旋进行了诊断分析。结果表明,潜热释放和暖平流在气旋发展初期起主要作用,潜热释放是气旋接近爆发性发展的最主要强迫项,这与以往研究的主要受涡度平流强迫的中国沿海温带气旋不同,说明在中国近海快速发展的一部分温带气旋主要是由潜热释放项强迫的。绝对涡度平流在气旋发展后期才成为主要强迫项。进一步利用MM5模式模拟了潜热释放的作用以及其他一些影响气旋发展的因素,海表面热通量、水汽通量以及气旋路径上的地形对这次气旋的发展有积极贡献,但作用相对潜热释放较小。由于这种在中国近海接近爆发性发展的温带气旋容易造成风暴潮,因此利用动能方程对气旋发展中期的渤海大风进行了诊断分析。结果表明,动能水平平流是动能增加的主要作用项,但动能达到最大值后渤海海域的动能主要由有效位能转换和动量下传提供。 |
| 关 键 词： | 温带气旋 扩展Z-O方程 潜热释放 动能方程 动能水平平流 |
Dynamic and Thermal Analyses on an Rapidly Developing Extratropical Cyclone after Entering Sea |
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| ZHU Ying-li,ZHOU Shu-ling,LIN Qu-feng,WU Zeng-mao.Dynamic and Thermal Analyses on an Rapidly Developing Extratropical Cyclone after Entering Sea[J].Plateau Meteorology,2012,31(3):788-797. | |
| Authors: | ZHU Ying-li ZHOU Shu-ling LIN Qu-feng WU Zeng-mao |
| Institution: | 1 (1.College of Physical and Environmental Oceanography,Ocean University of China,Qingdao 266100,China; 2.Shandong Weihai Meteorological Bureau,Weihai 264200,China; 3.Shandong Yantai Meteorological Bureau,Yantai 264003,China) |
| Abstract: | An extratropical cyclone which rapidly developed in the Yellow Sea and Bohai Sea on 3-5 March 2007 is diagnostically analyzed by the extended Zwack-Okossi equation.Results show that latent heat release and horizontalwarm-air advection are main forcing terms at the early developing stage,and latent heat release is mostly responsiblefor thealmost explosive development of thecyclone,while horizontalabsolute vorticity advection become the main forcing term at the late developing stage.Cold-air advection which is the dominant weakening term during the weakening stage of the cyclone and adiabatic cooling act as weakening the cyclone during the whole period.The surface sensible and latent heat fluxes contributed little to the development of the cyclone,with the negative contribution in Yellow Sea and Bohai Sea and the positive contribution in Japan Sea.The surface moist flux played more important role than the surface sensible and latent heat fluxes do in the development of cyclone.Changbai Mountain and Korean Mountain also are favorable for the development of cyclone by intensifying the precipitation and the latent heat.The cyclone resulted in a storm surge in Bohai Sea, so the gale in Bohai Sea by kinetic energy equation is analyzed.The results show that the increase of kinetic energy in Bohai Sea resulted from horizontal kinetic energy advection before 20:00 on 4 March 2007,with smaller contributions from available potential energy exchange and downward momentum transport.After 20:00,the kinetic energy in Bohai Sea was supplied by available potential energy exchange and downward momentum transport.The contribution of downward momentum transportwas equal to that of available potential energy exchange,and sometimeslarger than that of available potential energy exchange. |
| Keywords: | Extratropical cyclone Extended Z-O equation Latent heat release Kinetic energy equa-tion Horizontal advection of kinetic energy |
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