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| 宁夏地区"6.8"暴雨天气过程的可能物理成因 | |
| 引用本文： | 肖云清,纪晓玲,苏银兰,沈新勇,王善华.宁夏地区"6.8"暴雨天气过程的可能物理成因[J].气象科学,2005,25(4):410-418. |
| 作者姓名： | 肖云清 纪晓玲 苏银兰 沈新勇 王善华 |
| 作者单位： | 1. 银川市气象局,银川,750002 2. 宁夏气象台,银川,750002 3. 江苏省气象局,南京,210008 4. 南京信息工程大学大气科学系,南京,210044 |
| 基金项目： | 本文由国家重点基础研究发展规划项目（编号：2004CB418301）和国家自然科学基金项目（编号：40433007）以及上海台风研究基金课题（编号：2004）共同资助 |
| 摘 要： | 本文应用天气学分析及诊断分析方法，对2002年6月8日发生在宁夏的罕见暴雨天气过程进行分析。研究结果表明，暴雨天气是在有利的“东高西低”降水形势下产生的，其主要的触发天气系统是500hPa冷槽、700hPa高原低涡及地面锢囚锋。从动力学理论的分析角度来说，在宁夏地区的垂直方向上风速廓线线性和非线性分布激发产生了中尺度重力惯性波以及涡旋Rossby波，这两种中尺度扰动在切变基流中有可能发生不稳定，最终导致宁夏地区“6．8”暴雨天气过程的产生。而稳定的“东阻形势”和西南低空急流的维持是暴雨爆发与持续的可能主要原因。 |
| 关 键 词： | 暴雨 触发系统 低空急流 涡旋Rossby波 |
| 收稿时间： | 2004-05-02 |
| 修稿时间： | 2004-08-03 |
A POSSIBLE MECHANISM OF THE RAINSTORM ON JUNE 8, 2002 IN THE NINGXIA REGION |
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| Xiao Yunqing,Ji Xiaoling,Su Yinglan,Shen Xinyong and Wang Shanhua.A POSSIBLE MECHANISM OF THE RAINSTORM ON JUNE 8, 2002 IN THE NINGXIA REGION[J].Scientia Meteorologica Sinica,2005,25(4):410-418. | |
| Authors: | Xiao Yunqing Ji Xiaoling Su Yinglan Shen Xinyong and Wang Shanhua |
| Institution: | 1 Yinchuan Meteorological Administration , Yinchuan 750002; 2 Ningxia Meteorological Administration , Yinchuan 750002; 3 Jiangsu Meteorological Administration, Nanjing 210008; 4 Department of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing 210044 |
| Abstract: | In this paper we have analyzed the unusual rainstorm process in Ningxia Province on June 8,2002 by using of the synoptic and diagnostic analytical methods.The results show that the rainstorm weather was generated under the favorable "high east and low west" rainfall situation.The main triggering weather system is the 500 hPa cold trough,700 hPa plateau low vortex and ground occluded front.From the analytical view of dynamics the linear and nonlinear distribution of wind speed contour line on the vertical direction of the Ningxia region stimulated and generated meso-scale gravity inertia wave and vortex-Rossby wave.These two kinds of meso-scale disturbance could possibly become unstable in the shear base flow and finally caused the formation of rainstorm weather process on June 8.Thereby,the persistence of the stable "east blocking situation" and the southwest low jet is the main possible cause of the outburst and continuation of the rainstorm. |
| Keywords: | Rainstorm Generated system Low jet Vortex Rossby wave |
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