| 北京一次强对流天气过程的数值模拟 |
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| 引用本文： | 王延东,周筠珺,孙战奇,杜克磊,苏科学.北京一次强对流天气过程的数值模拟[J].成都信息工程学院学报,2011(6):617-624. |
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| 作者姓名： | 王延东 周筠珺 孙战奇 杜克磊 苏科学 |
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| 作者单位： | 成都信息工程学院大气科学学院;93534部队58分队;中国气象科学院灾害天气国家重点实验室;94833部队61分队 |
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| 基金项目： | 灾害天气国家重点实验室开放课题资助项目(2010-LASW-A08) |
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| 摘 要： | 为了对发生于2008年07月04日北京的一次强对流天气有更多的认识，利用三维对流云模式对其进行数值模拟研究。结果表明：模式可以较好地模拟出强对流天气各主要宏观发展阶段的特征，以及云中水成物粒子转化的微观特征；模式能够很好地模拟出此次强对流天气过程的风场特征，对流系统中存在有利的环境条件，风暴是由气流的辐合上升引起的。在发展初期，对流云低层为辐合上升气流，在对流云发展的成熟阶段，近地面层以辐散气流为主，中上层以辐合气流为主，且辐合达到最大，之后随着云体的消散，低层辐散下沉气流加强。气流在顶端转变方向，形成辐散出流。
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| 关 键 词： | 大气物理与大气环境 雷电物理学 强对流 水成物粒子 数值模拟 |
A Numerical Simulation on the Severe Convective Weather over Beijing |
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| WANG Yan-dong,ZHOU Yun-jun,SUN Zhan-qi,DU Ke-lei,SU Ke-xue.A Numerical Simulation on the Severe Convective Weather over Beijing[J].Journal of Chengdu University of Information Technology,2011(6):617-624. |
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| Authors: | WANG Yan-dong ZHOU Yun-jun SUN Zhan-qi DU Ke-lei SU Ke-xue |
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| Institution: | 1(1.College of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China;2.The 93534 troop of PLA,Beijing 101212,China;3.State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081,China;4.The 94833 troop of PLA,Nanchang 330201,China) |
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| Abstract: | In this paper, we use three-dimension convective cloud model to discuss the severe convective weather oc- curred over Beijing on July 04th, 2008. According to the results, this model can simulate the macroscopic characteris- tics of severe convective weather, as well as the microscopic characteristics of the evolution of hydrometeor particles in cloud. The model can simulate wind field characteristics. It shows that there are favorable conditions in the convec- tive system, the storm is drived by updraft convergence. In the early times, there is updraft convergence at the bot- tom of the cloud and during the mature stage, there is downdraft divergence near the ground surface layer and updraft in the upper layer, thus the convection cloud is enhanced. Later as downdraft strengthens in the lower layer, the could dissipates. |
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| Keywords: | atmospheric physics and environment lightning physics severe convection water solid particles numer-ical simulation |
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