| 1998年7月20~21日武汉地区梅雨锋上突发性中-β系统的发生发展分析 |
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| 引用本文： | 张小玲,陶诗言,等.1998年7月20~21日武汉地区梅雨锋上突发性中-β系统的发生发展分析[J].应用气象学报,2002,13(4):377-396. |
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| 作者姓名： | 张小玲 陶诗言 |
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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 4 0 90 3)、第二部分 (G1 9980 4 0 90 8)共同资助 |
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| 摘 要： | 1998年7月21日鄂东南地区出现特大暴雨，其中武汉市出现1 h降水量超过88 mm的突发性大暴雨（简称“98.7”大暴雨）。通过诊断分析发现:武汉地区的“98.7”突发性大暴雨是中-β尺度系统强烈发展引起的；在暴雨发生前武汉附近整个对流层大气积聚了大量的水汽，整个层结接近饱和，并且蕴涵着大量对流有效位能（CAPE）；中-β尺度系统形成后停滞少动数小时，使中-β系统区域积累大量的可降水，引起“98.7”突发性强暴雨。
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| 关 键 词： | 突发性 中-β尺度系统 有效位能 (CAPE) |
| 收稿时间： | 2001-01-09 |
| 修稿时间： | 2001年1月9日 |
AN ANALYSIS ON DEVELOPMENT OF MESO-β CONVECTIVE SYSTEM ALONG MEIYU FRONT ASSOCIATED WITH FLOOD IN WUHAN IN 20-21 JULY 1998 |
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| Zhang Xiaoling Tao Shiyan Zhang Qingyun.AN ANALYSIS ON DEVELOPMENT OF MESO-β CONVECTIVE SYSTEM ALONG MEIYU FRONT ASSOCIATED WITH FLOOD IN WUHAN IN 20-21 JULY 1998[J].Quarterly Journal of Applied Meteorology,2002,13(4):377-396. |
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| Authors: | Zhang Xiaoling Tao Shiyan Zhang Qingyun |
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| Affiliation: | The Institute of Atmospheric Physics Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | On 21 July 1998 a flash flood associated with a meso-β convective system occurred in Wuhan, producing 88 mm rainfall in an hour. A diagnostic study of the genesis and development of the mesoscale convective system (MCS) is presented. The conclusions are as follows: (1) The flash flood occurred during the rapidly developing stage of the MCS. (2) There was aboundent moisture gathered in the lower troposphere and the atmosphere was nearly saturated with a big store of convective available potential energy (CAPE). (3) The MCS became nearly stationary in the vicinity of Wuhan after formed and a great amount of rainfall was accumulated in this area. |
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| Keywords: | Flash flood MCS CAPE |
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