寿绍文,励申申,张诚忠,范可. 2001. 梅雨锋中尺度切变线雨带的动力结构分析[J]. 气象学报, 59(4):405-413, doi:10.11676/qxxb2001.044
梅雨锋中尺度切变线雨带的动力结构分析
THE DYNAMICAL STRUCTURE OF A MESOSCALE SHEAR-LINE RAIN BELT ON MEIYU-FRONT
投稿时间:2000-03-30  修订日期:2001-04-21
DOI:10.11676/qxxb2001.044
中文关键词:  梅雨锋  中尺度切变线  中尺度涡管  条件性对称不稳定
英文关键词:Meiyu front  Mesoscale shear-line  Mesoscale vortextube  Conditional symmetric instability
基金项目:国家自然科学基金项目(49775259,40075009)
作者单位
寿绍文 南京气象学院南京, 210044 
励申申 南京气象学院南京, 210044 
张诚忠 南京气象学院南京, 210044 
范可 南京气象学院南京, 210044 
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中文摘要:
      利用密集的地面观测网资料以及中尺度数值预报模式输出产品,分析了1991年7月8~9日江淮地区梅雨锋中尺度切变线雨带的中尺度动力结构.发现沿切变线走向有一条中尺度涡管,位于对流层中低层,高度呈波状起伏.波峰处有较强经向环流,强降水位于波峰附近的经向垂直环流之下.降水强度与涡管强度密切相关,涡管增强时降水增强.涡管强度与中低空的条件性对称不稳定有关.
英文摘要:
      Based on the products of the mesoscale numerical model MM4 and surface observational data,the dynamical structure of a typical mesoscale shear-line rain belt occurring on Meiyufront in the Changjiang-Huaihe River Basin during July 8-9,1991 has been analyzed in this paper.The results showed that there was a mesoscale vortex tube along the mesoscale shearline on the middle-low troposphere,and its altitude varied in a wave-shape.There was stronger longitudinal circulation near the wave peak.The surface mesoscale cyclonic and anti-cyclonic circulations were located at east and west sides of the wave peak respectively.Heavy rain area located under the vertical longitudinal circulation near the wave peak.The precipitation intensity was closely related with the intensity of the vortextube.The latter was closely related with the conditional symmetric instability in the middle-low troposphere.
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