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| 干旱区一次锋面过境短时暴雨中尺度系统分析 | |
| 引用本文： | 纪晓玲,陈晓娟,邵建,杨侃,裴晓蓉,辛尧胜.干旱区一次锋面过境短时暴雨中尺度系统分析[J].中国沙漠,2012,32(6):1731-1737. |
| 作者姓名： | 纪晓玲 陈晓娟 邵建 杨侃 裴晓蓉 辛尧胜 |
| 作者单位： | 1. 宁夏气象防灾减灾重点实验室,宁夏银川750002 宁夏气象台,宁夏银川750002 2. 宁夏气象台,宁夏银川,750002 3. 宁夏气象防灾减灾重点实验室,宁夏银川,750002 |
| 基金项目： | 中国气象局气象新技术推广预报员专项，宁夏自然科学基金项目，宁夏短时强降水分级监测预警指标及概念模型研究项目 |
| 摘 要： | 利用加密自动站、卫星云图及雷达图像等资料,对2010年6月7日白天到夜间宁夏中北部地区出现的短时暴雨天气成因及中尺度系统演变进行分析。结果表明,此次短时暴雨是在“东高西低”稳定的环流形势和锋面过境背景下,500 hPa西风槽,700 hPa切变线、低涡、低空急流,850 hPa切变线,地面冷锋等主要影响系统相互配合、共同作用下发生的;大降水落区位于低空急流左侧与切变线尾部的辐合区,这可作为宁夏中尺度暴雨天气系统的一种典型特征;逆风区的出现和S型风场、锋面过境雷达图像特征是此次强降水典型的雷达回波特征,逆风区分布与中尺度系统走向基本一致。 |
| 关 键 词： | 锋面过境 短时暴雨 中尺度系统 自动站 雷达图像 |
Analysis of Mesoscale System on a Short-time Rainstorm Caused by Cold Front in Arid Area |
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| JI Xiao-ling,CHEN Xiao-juan,SHAO Jian,YANG Kan,PEI Xiao-rong,XIN Yao-sheng.Analysis of Mesoscale System on a Short-time Rainstorm Caused by Cold Front in Arid Area[J].Journal of Desert Research,2012,32(6):1731-1737. | |
| Authors: | JI Xiao-ling CHEN Xiao-juan SHAO Jian YANG Kan PEI Xiao-rong XIN Yao-sheng |
| Institution: | 1.Ningxia Key Laboratory of Meteorological Disaster Preventing and Reducing, Yinchuan 750002, China; 2.Ningxia Meteorological Observatory, Yinchuan 750002, China |
| Abstract: | On June 7th, 2010, a short-time heavy rain occurred in the mid-north region of Ningxia, the synoptic causes of this weather process and the evolution of mesoscale system are analyzed by using the data of automatic weather station, satellite and radar images, etc. The result shows, this short-time rainstorm was caused by the interaction of influence systems, such as 500 hPa west wind trough, 700 hPa shear line, vortex, low level jet, 850 hPa shear line, the ground cold front etc, under the background of cold front transit and persistent circulation situation of "high in the east while low in the west". The heavy rain was located in the convergence area of the left of low level jet and the end of shear line, it could be a typical characteristic of weather system of mesoscale heavy rain in Ningxia. During this heavy rain process, adverse wind area, wind field with zero line like "s" and front transit were the typical characteristics of radar image, and the distribution of adverse wind area was similar to the mesoscale system. |
| Keywords: | front transit short-time rainstorm mesoscale system automatic weather station radar image |
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