| 天山北坡中部一次强对流风暴的雷达回波特征分析 |
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| 引用本文： | 郭金强,赵俊荣,张治雄.天山北坡中部一次强对流风暴的雷达回波特征分析[J].内蒙古气象,2011(4):26-31. |
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| 作者姓名： | 郭金强 赵俊荣 张治雄 |
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| 作者单位： | 1. 石河子气象台,新疆石河子,832003
2. 独山子气象局,新疆独山子,833600 |
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| 基金项目： | 新疆气象局科研基金项目 |
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| 摘 要： | 利用Doppler雷达产品、结合常规观测资料,对2008年7月25日发生在石河子垦区中部、南部强对流天气的雷达回波特征进行了详细分析。结果表明:石河子垦区2008年7月25日强对流风暴发生在西伯利亚至巴尔喀什湖冷槽东南象限的对流不稳定层结中,近低层至地面有中尺度辐合切变线。该强风暴呈现出超级单体螺旋状回波,相应的径向速度图上出现中气旋和中尺度辐合带;冰雹的强回波中心强度达65dBz,60dBz回波顶高达5km、65dBz回波顶高达3km,垂直累积液态含水量由10kg.m-2跃增到75 kg.m-2,暴雨的强回波中心强度为55dBz,55dBz顶高达3.5km,垂直累积液态含水量由15kg.m-2增加到55 kg.m-2;Doppler雷达产品特征对冰雹、暴雨等强对流天气监测预警具有重要的指示意义。
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| 关 键 词： | 强风暴 螺旋状回波 中气旋 中尺度辐合带 |
Analysis on the Radar Echo Characteristics of a Severe Convective Storm in Central of Tian Mountain North Slope |
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| Authors: | Guo Jinqiang Zhao Junrong Zhang zhixiong |
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| Institution: | 1.Xinjiang Shihezi Meteorological Bureau,Xinjiang Shihezi 832000;2.Duzishan Meteorological Bureau,Xinjiang Duzishan 833600) |
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| Abstract: | Using Doppler radar production and combining with conventional observation data,the radar echo characteristics of severe convection weather in central and southern of Shihezi reclamation area on July 25,2008 was analyzed.The results showed that： the severe convection storm happened in the convective and instable stratification of cold trough southeast quadrant from Siberia to Baal Kashgar lake,there was mesoscale convergence shear line in lower layers.This severe storm presented supercell heliciform echo,there were mesocyclone and mesoscale convergence area in corresponding radial velocity.The center intensity of the haily echo was 65dBZ,the height of 60dBZ echo top was 5km,the height of 65dBZ echo top was 3km,vertical accumulation liquid state moisture content increased from 10kg/m2 to 75 kg/m2,The center intensity of the rainstorm echo was 55dBZ,and it＇s height of echo top was 3.5km,vertical accumulation liquid state moisture content increased from 15kg/m2 to 55 kg/m2,the products characteristics of Doppler radar has important indicate significance for monitoring and warning of hail,heavy rain and other severe convective weather. |
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| Keywords: | severe storm spiral echo mesoscyclone mesoscale convergence zone |
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