| 1996年7月洞庭湖流域持续性暴雨过程分析 |
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| 引用本文： | 张小玲,陶诗言,张顺利,张庆云.1996年7月洞庭湖流域持续性暴雨过程分析[J].应用气象学报,2004,15(1):21-31. |
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| 作者姓名： | 张小玲 陶诗言 张顺利 张庆云 |
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| 作者单位： | 中国科学院大气物理研究所, 北京 100029 |
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| 基金项目： | 国家重点基础研究发展规划项目“我国重大气候和天气灾害形成机理与预测理论研究”第一部分(G1 9980 40 90 3 )、第二部分 (G1 9980 40 90 8)的共同资助 |
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| 摘 要： | 1996年7月洞庭湖流域发生了严重的洪涝灾害。利用观测资料进行诊断分析表明:(1)这次大洪水是由梅雨锋西端高空槽前的持续性大面积暴雨引起；(2)引起持续性暴雨的直接原因是MCS形成后停滞少动，并在同一地区连续多次生消；(3)由于高空槽长时间维持在长江中游地区，对流层低层的暖平流等大尺度强迫使暴雨区能较长时间维持上升运动，同时低层持续强的水汽辐合和位势不稳定能量的输送为暴雨持续地发生提供了充足的水汽和能量。
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| 关 键 词： | 梅雨锋 高空槽 MCS 大尺度强迫 |
| 收稿时间： | 2002-12-25 |
| 修稿时间： | 2002年12月25 |
A Case Study of Persistent Heavy Rainfall over Hunan Province in July 1996 |
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| Zhang Xiaoling,Tao Shiyan,Zhang Shunli,Zhang Qingyun.A Case Study of Persistent Heavy Rainfall over Hunan Province in July 1996[J].Quarterly Journal of Applied Meteorology,2004,15(1):21-31. |
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| Authors: | Zhang Xiaoling Tao Shiyan Zhang Shunli Zhang Qingyun |
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| Institution: | Institute of Atmospheric Physics , Chinese Academy of Sciences , Beijing 100029 |
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| Abstract: | The heavy rainfall over Hunan province in July 1996 was studied. The main conclusions is made as follows: (1) Persistent rainstorms causing flash-flood in Hunan province lied in the front of 500 hPa short wave troughs. (2) MCS generated and detained in the same area, which is the direct reason causing lasting heavy rainfall. (3) By warm advection in the lower troposphere and other large-scale forcing, the upper troughs maintained over the middle of the Yangtze River Basin, which brought continuous lifting movement in the rainstorm area. At the same time, continuous moisture convergence and potential instable energy transport in the lower layers provided enough water and energy for lasting heavy precipitation over the rainstorm area. |
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| Keywords: | Meiyu front Upper trough MCS Large-scale forcing |
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