| “倾斜”高空急流轴在大暴雨过程中的作用 |
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| 引用本文： | 徐海明,何金海,周兵.“倾斜”高空急流轴在大暴雨过程中的作用[J].南京气象学院学报,2001,24(2):155-161. |
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| 作者姓名： | 徐海明 何金海 周兵 |
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| 作者单位： | 南京气象学院大气科学系, |
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| 基金项目： | “我国重大天气灾害的形成机理和预测理论研究”项目 G1 9980 4 0 90 8资助 |
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| 摘 要： | 从理论分析和实例计算两方面探讨了高空急流轴的倾斜对急流出口处右侧辐散场形成的作用，理论分析和实例计算表明，一旦高空轴流轴发生倾斜，则由于其出口处长平风场的分布不均匀势必会在“倾斜”急流轴出口处的右侧出现强的辐散场，实例计算也表明，高空急流轴倾斜以及急流出口处右侧强辐散场的出现明显早于大暴雨的产生，因此，高空急流轴走向的变化对于预暴雨的发生发展具有很好的指示意义。
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| 关 键 词： | 倾斜高空急流轴 出口处右侧辐散 暴雨过程分析 地转偏差 环流形势 |
| 修稿时间： | 2000年9月4日 |
Role of the NW-SE oriented upper-tropospheric jet axis in rainstorm development |
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| Xu Haiming,He Jinhai,Zhou Bing.Role of the NW-SE oriented upper-tropospheric jet axis in rainstorm development[J].Journal of Nanjing Institute of Meteorology,2001,24(2):155-161. |
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| Authors: | Xu Haiming He Jinhai Zhou Bing |
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| Abstract: | Theoretical and numerical studies are conducted of the effect of the NW SE oriented upper tropospheric jet axis on divergence genesis to the right of its exit region, showing that as soon as the axis lies in such a direction, vigorous divergence will certainly be formed there owing to the inhomogeneity of the horizontal wind distribution there under the influence of the advection terms.Composite analysis and case study indicate that the NW SE oriented jet axis and strong divergence happening are considerably earlier compared to the rainstorm occurrence.As such,the change of the orientation of upper tropospheric jet axis is a good indicator in the prediction of rainstorm. |
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| Keywords: | NW SE oriented upper tropospheric jet axis divergence to the right of the exit region rainstorm |
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