|
|||||
|
|
| 一次江淮切变线暴雨过程的数值模拟与诊断分析 | |
| 引用本文： | 王华文,姜勇强,陈中一,等.一次江淮切变线暴雨过程的数值模拟与诊断分析[J].气象与环境科学,2012,35(3):17-25. |
| 作者姓名： | 王华文 姜勇强 陈中一 等 |
| 作者单位： | 1. 酒泉卫星发射中心,甘肃酒泉,732750 2. 解放军理工大学气象学院,南京,211101 3. 蚌埠市气象局,安徽蚌埠,233000 |
| 基金项目： | 公益性行业专项，国家自然科学基金项目 |
| 摘 要： | 采用非静力中尺度模式WRFV3.3对2010年7月12-13日一次江淮切变线暴雨过程进行数值模拟,分析了暴雨形成的大尺度环流条件、中尺度气旋演变,并对涡旋与变形场的相互作用指数VDI与降水之间的关系进行了探讨。结果表明：本次暴雨过程为典型的切变线降水过程,是在高层200 hPa强大的南亚高压稳定少动,中层500hPa短波槽生成东移、西太平洋副热带高压维持的背景下,由低层700 hPa和850 hPa切变线上中尺度低涡以及地面梅雨锋扰动的共同作用造成的。WRFV3.3较好地模拟了本次暴雨过程的雨带和暴雨中心。中尺度气旋发生于长江中下游呈东北-西南走向的切变线上,暴雨发生于700 hPa切变线南侧、低空急流轴的左侧,急流轴上的大风速中心与1 h雨强有较好的对应关系。中尺度涡旋与大风速中心之间存在着明显的相关性,风速增强,涡旋增强。VDI指数对降水中心和强度有较好的指示性,有助于在实际预报业务中对降水中心和强度做出正确判断。 |
| 关 键 词： | 暴雨 切变线 中尺度涡旋 数值模拟 VDI |
Numerical Simulation and Diagnostic Analysis of a Yangtze and Huaihe River Shear-line Heavy Rainfall Event |
|
| Wang Huawen,Jiang Yongqlang,Chen Zhongyi,Chen Jingyang.Numerical Simulation and Diagnostic Analysis of a Yangtze and Huaihe River Shear-line Heavy Rainfall Event[J].Meteorological and Environmental Sciences,2012,35(3):17-25. | |
| Authors: | Wang Huawen Jiang Yongqlang Chen Zhongyi Chen Jingyang |
| Institution: | 1. Jiuquan Satellite Launch Center, Jiuquan 732750,China; 2. School of Meteorology of PLA University of Science and Technology, N anjing 211101, China; 3. Bengbu Meteorological Office, Benghu 233000, China) |
| Abstract: | By using the non-hydrostatic meso-scale model WRFV3.3, a shear-line heavy rainfall e- vent over Yangtze and Huaihe River basin during 12--13 July 2010 is numerical simulated. The large scale circulation condition, meso-scale cyclone development and the relationship between VDI （interac- tion index of vortex and deformation field） and rainfall are analyzed. It is shown that the shear-line heavy rainfall process occurs under the influences of the stable 200 hPa South Asia high, 500 hPa eastward short wave trough and western Pacific subtropical high, 700 hPa and 850 hPa meso-seale cyclones, and the perturbations of Meiyu front. WRFV3.3 is well simulated the rainbands and rainstorm center of rain- storm process. Meso-scale cyclones occurred within the northeast-southwest orientated shear line over middle and lower reaches of Yangtze River, while heavy rainfall occurred to the south of the shear line and to the left of the low-level jet （LLJ）. The large wind speed center of LLJ is well corresponding to the 1 h rain intensity. There is significant correlation between meso-scale vortex and large wind speed center, the stronger wind speed is, the stronger vortex becomes. The VDI is well directed the precipitation center and intensity, which is help to make the right judgment in the actual forecast. |
| Keywords: | heavy rainfall shear line meso-scale vortex numerical simulation VDI |
| 本文献已被 维普 万方数据 等数据库收录！ | |
| 点击此处可从《气象与环境科学》浏览原始摘要信息 | |
| 点击此处可从《气象与环境科学》下载免费的PDF全文 | |