| 用雷达风廓线产品分析一次暴雨与高低空急流的关系 |
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| 引用本文： | 张京英,漆梁波,王庆华.用雷达风廓线产品分析一次暴雨与高低空急流的关系[J].气象,2005,31(12):41-45. |
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| 作者姓名： | 张京英 漆梁波 王庆华 |
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| 作者单位： | 1. 山东临沂气象局,276004
2. 上海中心气象台 |
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| 摘 要： | 利用2004年7月16日临沂市暴雨过程的新一代天气雷达风廓线资料和每小时的雨量资料,对比分析发现：暴雨过程具有明显的中小尺度系统影响特征,雷达风廓线资料可以很直观地显示西南气流风场的垂直结构和持久存在;高、低空急流及其向下的脉动与降水强度的增强有着紧密的联系;由低空急流向下脉动和加强引起的降水加强幅度要比单纯的高空急流向下脉动和加强引起的降水加强大得多,暴雨的产生主要由低空急流的下传和加强引起的;并利用表征高、低空急流下传程度的指数清楚地表示出降水强度与高、低空急流之间存在的密切关系.
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| 关 键 词： | 高空急流 低空急流 暴雨 雷达风廓线 |
Analysis of Relationship between Heavy Rain and Jetstream with Radar VWP Product |
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| Zhang Jingying,Qi Liangbo,Wang Qinghua.Analysis of Relationship between Heavy Rain and Jetstream with Radar VWP Product[J].Meteorological Monthly,2005,31(12):41-45. |
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| Authors: | Zhang Jingying Qi Liangbo Wang Qinghua |
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| Institution: | 1. Linyi Meteorological Office, Shandong Province 276004; 2, Shanghai Meteorological Center |
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| Abstract: | An analysis of a heavy rainfall event on 16, July 2004 in Linyi, Shandong is made with radar's VWP product and hourly rainfall data, it shows that the event is characterized with apparent meso-scale features, the vertical structure and maintaining of southwest-moist-jet can be clearly revealed by VWP product, high and low level jet, both with their downward perturbation relate closely with enhancement of rainfall. Extent of rainfall enhancement caused by low level jet's intensification and its downward perturbation is much greater than that of high level jet, and heavy rainfall is mainly induced by low level jet's intensification and perturbation. A jet perturbation index is developed and applied to verify this viewpoint. |
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| Keywords: | high level jet low level jet heavy rainfall radar VWP |
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