| 山东省一次积层混合云暴雨三维风场的双多普勒雷达探测 |
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| 引用本文： | 盛日锋,王俊,李欣,龚佃利.山东省一次积层混合云暴雨三维风场的双多普勒雷达探测[J].南京气象学院学报,2008,31(5):731-737. |
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| 作者姓名： | 盛日锋 王俊 李欣 龚佃利 |
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| 作者单位： | 1. 山东省蒙阴县气象局,山东,蒙阴,276200
2. 山东省蒙阴县气象局,山东,蒙阴276200 |
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| 基金项目： | 武汉暴雨所暴雨研究开放基金，山东省自然科学基金，山东省局重点攻关项目，国家科技支撑计划，山东省局科技项目 |
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| 摘 要： | 使用地基双多普勒天气雷达监测资料和常规探测资料，对2005年9月19日凌晨发生在鲁中地区的一次暴雨进行分析，结果表明：本时段暴雨是积层混合云降水所致，中低层存在切变线和辐合线，风场中尺度结构造成小尺度对流单体的发展，这些对流单体以带状结构组成回波群镶嵌在大面积的层状云中；伴随弱冷空气侵入，风场的中尺度结构主要出现在4km以下的层次，中低层切变线和冷空气的侵入是强回波单体发展的动力因素；在垂直方向上，强回波区有明显的垂直运动。风场的中尺度结构对鲁中强降水的发生和维持有重要作用。
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| 关 键 词： | 双多普勒雷达 暴雨 三维风场 中尺度结构 |
Mesoscale Wind Structures of a Mixed Cloud Heavy Rain in Shandong by Dual-Doppler Radar |
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| SHENG Ri-feng,WANG Jun,LI Xin,GONG Dian-li.Mesoscale Wind Structures of a Mixed Cloud Heavy Rain in Shandong by Dual-Doppler Radar[J].Journal of Nanjing Institute of Meteorology,2008,31(5):731-737. |
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| Authors: | SHENG Ri-feng WANG Jun LI Xin GONG Dian-li |
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| Institution: | SHENG Ri-feng,WANG Jun ,LI Xin, GONG Dian-li (1. Shandong Weather Modification Office,Jinan 250031 ,China; 2. Mengyin Meteorological Bureau of Shandong Province,Mengyin 276200, China) |
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| Abstract: | The three-dimensional wind fields of the heavy rain on September 19th, 2005, in middle Shandong Province are retrieved and explored with ground-based dual-Doppler radar data and conventional observations. Results show that the heavy rain is caused by the cumulus-stratus mixed cloud with the shear and convergence lines in the low level. Development of the small-scale convective cell is induced by the mesoscale structure of wind field, and the cells nested in the large stratus are organized to echo bands. Along with cold air diffusing southeastward, the mesoscale structure of wind field mainly locates in the layer below 4 krn. Kinetic factors of the cell with a strong echo are shear lines in the low and middle levels and cold air diffusion. Moreover, it is found that the marked vertical motion happens in the strong echo area. The wind mesoscale structure plays an important role in initiating and maintaining the heavy rain. |
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| Keywords: | dual-Doppler radar heavy rainfall three-dimensional wind field mesoscale structure |
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