| 影响江淮地区的西南涡中尺度结构特征 |
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| 引用本文： | 韦统健,薛建军.影响江淮地区的西南涡中尺度结构特征[J].高原气象,1996,15(4):456-463. |
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| 作者姓名： | 韦统健 薛建军 |
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| 作者单位： | 南京大学大气科学系 |
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| 摘 要： | 利用合成方法对３次西南涡过程的流场，温湿场和涡度场等进行了分析。结果指出：沿切变线存在风场的中尺度扰动，低涡的尺度为２５０－３００ｋｍ，中低层有两支不同性质的气流流入低涡区，降水主要发生在低涡移动方向右侧的两象限。温湿场和铅直流场在低涡区呈现明显的不对称分布，低涡是一个显著的斜压系统。
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| 关 键 词： | 切变线 低涡 中尺度 结构特征 江淮地区 西南涡 |
THE MESOSCALE STRUCTURE CHARACTERISTICS OF SOUTHWEST VORTEX OVER JIANG-HUAI RIVER AREAS |
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| WEI Tongjian,XUE Jianjun.THE MESOSCALE STRUCTURE CHARACTERISTICS OF SOUTHWEST VORTEX OVER JIANG-HUAI RIVER AREAS[J].Plateau Meteorology,1996,15(4):456-463. |
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| Authors: | WEI Tongjian XUE Jianjun |
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| Abstract: | By using composite method,the three cases of low vortex occurring along the Yangtze River valley are presented in this paper Structures of airflow vertical motion,temperature,humidity fields are analysed The analyses indicate that there is a series of wave along the shear line in the mesoscale wind field and the low vortex wave-length is 250 300km The low vortex is a baroclinic system and the heavy rain usually occurring on its right side |
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| Keywords: | Shear line Low vortex Vertical velocity |
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