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| 一次飑线天气过程多普勒雷达产品分析及临近预报 | |
| 引用本文： | 丁青兰,刘武,朱晓虎,李靖.一次飑线天气过程多普勒雷达产品分析及临近预报[J].气象科技,2008,36(2):160-163. |
| 作者姓名： | 丁青兰 刘武 朱晓虎 李靖 |
| 作者单位： | 1. 北京市气象台,北京,100089 2. 民航贵阳空管中心,贵阳,550012 3. 江苏省东台市气象局,东台,224200 |
| 基金项目： | 北京市气象局预报员专项 |
| 摘 要： | 为了对飑线这类强天气作有效的预报、预警,同时对临近预报系统的预报效果作初步的检验,利用常规气象资料、自动站资料、多普勒雷达资料,结合临近预报系统分析了2006年8月1日北京地区飑线天气过程.结果表明:飑线是在有利的天气形势下发生的,飑线上强风暴的强度大、高度高;飑线速度剖面图中显示有低层辐散、中层辐合、高层辐散的特征;垂直累积液态水含量迅猛增加到比较大的数值对冰雹预报有很好的指示意义;在冰雹指数产品中以强冰雹概率大于30%作为冰雹预警门限则有较好的效果;边界层辐合线起到了触发对流和加强对流的作用.临近预报系统可作为强对流临近预报的有力工具. |
| 关 键 词： | 飑线 多普勒雷达 边界层辐合线 临近预报系统 |
| 收稿时间： | 2006/11/9 0:00:00 |
| 修稿时间： | 2006年11月9日 |
Analysis and Nowcasting of a Squall Line Using Dopper Radar Products |
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| Ding Qinglan,Liu Wu,Zhu Xiaohu and Li Jing.Analysis and Nowcasting of a Squall Line Using Dopper Radar Products[J].Meteorological Science and Technology,2008,36(2):160-163. | |
| Authors: | Ding Qinglan Liu Wu Zhu Xiaohu and Li Jing |
| Institution: | Beijing Meteorological Office, Beijing 100089;Air Traffic Management Bureau of Guiyang,CAAC, Guiyang 550012;Dongtai Meteorological Bureau, Jiangsu Province, Dongtai 224200;Beijing Meteorological Office, Beijing 100089 |
| Abstract: | In order to effectively forecast or forewarn squall lines and verify the effectiveness of the nowcasting system, a squall line occurring on 1 August 2006 in Beijing is analyzed by using conventional weather data, automatic weather station data, Doppler radar data, and the nowcasting system. The results suggest that the squall line occurred under the favorable weather conditions. The severe storms on the squall line had large radar reflectivity and high tops of echoes. There was a divergence at lower level, a convergence at middle level, and a divergence at upper level in the velocity cross section of the squall. The VIL (Vertical Integrated Liquid water) of the storms increased rapidly to a large value, which is a good indictor of hailstorm. When the probability of severe hail is larger than 30% according to the hail index products, a hail storm is very likely to happen. The convergence line in the boundary can trigger and intensify convections. The nowcasting system is a good tool for nowcasting severe convections. |
| Keywords: | squall line Doppler radar convergence line in the boundary layer nowcasting system |
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