| THE DYNAMICAL ANALYSIS OF THE STRUCTURE OF Β MESO-SCALE DOUBLE RAINBANDS IN MEIYU FRONT |
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| 引用本文： | 王春明,王元,伍荣生.THE DYNAMICAL ANALYSIS OF THE STRUCTURE OF Β MESO-SCALE DOUBLE RAINBANDS IN MEIYU FRONT[J].热带气象学报(英文版),2007(2). |
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| 作者姓名： | 王春明 王元 伍荣生 |
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| 作者单位： | Key Laboratory for Mesoscale Severe Weather of Ministry of Education Nanjing University，Key Laboratory for Mesoscale Severe Weather of Ministry of Education Nanjing University，Key Laboratory for Mesoscale Severe Weather of Ministry of Education Nanjing University，Nanjing 210093 China，Nanjing 210093 China，Nanjing 210093 China |
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| 基金项目： | State Key Basic Program (Project 973, 2004CB18301)，Doctorate-Supervisor Foundation,MOE under Grant (20050284035)，Project of Natural Science Foundation of Jiangsu Province (BK99020,BK2005081) |
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| 摘 要： | In this paper, an idealized perturbation following the "surge-flow conceptual model" for typical Meiyu frontal structure is designed to explain the β meso-scale structure of rainbands in the Meiyu front using a non-hydrostatic, full-compressible storm-scale model including multi-phase microphysical parameterization. In addition, sensitivity numerical experiment on the vertical distribution of the ambient meridional wind is conducted to investigate the generation mechanism of β meso-scale double rainbands. The results of numerical experiments show that the cool and dry downdraft invading strengthened by the environmental aloft northerly wind plays a very important role to the generation and maintenance of the β meso-scale double rainbands. Moreover, the intensity and scale of the dry and cool downdraft invading are related to the intensity of the second circumfluence induced by mass adjustment when the acceleration of the westerly jet aloft occurs.
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| 关 键 词： | β meso-scale rainbands in Meiyu front dry and cool downdraft acceleration of westerly jet aloft |
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