| “20110809”石家庄西部大暴雨分析 |
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| 引用本文： | 李国翠,孙云,李国平,张立霞.“20110809”石家庄西部大暴雨分析[J].气象与环境学报,2013,29(5):1-5. |
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| 作者姓名： | 李国翠 孙云 李国平 张立霞 |
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| 作者单位： | 1.石家庄市气象局，河北 石家庄 050081；2.成都信息工程学院大气科学学院，四川 成都 610225 |
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| 基金项目： | 中国气象局西南区域气象中心区域重大科研业务项目（2010-3）、公益性行业（气象）专项（GYHY200906011）、河北省气象局课题（11ky41、13ky04和13ky24）和＂河北暴雨创新团队＂共同资助. |
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| 摘 要： | 利用雷达、自动站和GPS可降水量等高时空分辨率加密观测资料，对石家庄一次局地大暴雨天气过程进行分析。结果表明：在高温高湿的大气环境下，弱切变线的西摆北伸是此次强对流天气过程出现的触发机制和预报难点，切变线位置是造成石家庄西部大暴雨的主要环流背景；强降水出现前大气水汽含量快速积累，GPS可降水量突升且存在着两个峰值，其中最大值刚好对应降水开始时间，次大值提前于降水出现时间16 h。强降水回波缘于主体回波、阵风锋以及新生回波的合并发展加强，CR、VIL和ET峰值分别达61 dBz、55 kg·m-2和17 km。在高温高湿的大气环境下，新生发展的回波、阵风锋、速度图上辐合、气旋或逆风区等都可以预示强对流天气发展。
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| 关 键 词： | 大暴雨 雷达 GPS可降水量 |
Analysis of heavy rain on August 9,2011 in west of Shijiazhuang area |
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| LI Guo-cui,SUN Yun,LI Guo-ping,ZHANG Li-xia.Analysis of heavy rain on August 9,2011 in west of Shijiazhuang area[J].Journal of Meteorology and Environment,2013,29(5):1-5. |
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| Authors: | LI Guo-cui SUN Yun LI Guo-ping ZHANG Li-xia |
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| Institution: | 1. Shijiazhuang Meteorological Service, Shijiazhuang 050081, China; 2. College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China |
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| Abstract: | Based on the meteorological data from a Doppler radar and intensive automatic weather stations,and the GPS precipitable water vapor data,a local heavy rain process in the west of Shijiazhuang area was analyzed.The results show that the weak shear line moving westward and stretching northward are trigger mechanism and forecasting focus of this process under high temperature and high humidity atmospheric environment.The location of shear line is its main circulation background.Atmospheric water vapor is accumulated rapidly before the severe convective weather occurs,and the curve of the GPS precipitable water vapor contents has two peaks.The maximum peak value corresponds to the starting time of precipitation exactly,and the second one is ahead of 16 hours before the heavy rain.An echo of the strong precipitation is generated by the combined development of the main echo,the gust front and the newborn echo.The peak values of combine reflectivity （CR）,vertically integrated liquid （VIL） and echo top （ET） are 61 dBz,55 kg·m-2 and 17 km,respectively.Under the high temperature and high humidity atmospheric environment,a newborn echo,the gust front,convergence and cyclone or inversion wind area on the speed map are of indicative to the development of convective weather. |
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| Keywords: | Heavy rain Radar Precipitable water vapor from GPS |
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