| 经向型持续性特大暴雨的合成分析 |
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| 引用本文： | 雷雨顺.经向型持续性特大暴雨的合成分析[J].气象学报,1981,39(2):168-181. |
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| 作者姓名： | 雷雨顺 |
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| 作者单位： | 中央气象局气象科学研究院 |
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| 摘 要： | 本文考察了10次经向型持续性特大暴雨,发现它们是由发生在能量锋前的中尺度强雨暴系统产生的。合成分析结果表明,在暴雨区北方和东方各有一阻塞高压,二者同时出现所构成的稳定大形势,是形成经向型特大暴雨的基本环流背景;和这二者相联系的高空副热带急流和低空偏南风急流,是产生暴雨的直接动力条件。它们既提供了形成暴雨所必需的能源,又造成了释放不稳定能量的启动条件;形势的稳定少变,又能使暴雨在同一地区数日维持。合成分析还说明,各种有利条件的组合必然使暴雨局限在一中尺度区域,以外的地区则不会同时具备发生暴雨的各个条件。
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| 收稿时间： | 1979/12/29 0:00:00 |
| 修稿时间： | 1980/4/18 0:00:00 |
THE COMPOSITIVE ANALYSIS OF THE MERIDIONAL TYPE PERSISTENT SEVERE RAINSTORMS |
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| Lei Yu-shun.THE COMPOSITIVE ANALYSIS OF THE MERIDIONAL TYPE PERSISTENT SEVERE RAINSTORMS[J].Acta Meteorologica Sinica,1981,39(2):168-181. |
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| Authors: | Lei Yu-shun |
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| Institution: | Institute on Weather and Climate Research, Academy of Meteorological Science, Beijing |
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| Abstract: | From the compositive analysis for 10 cases of the meridional type persitent and exceptionaliy severe rainstorms,it is found that these rainstorms occurred ahead of the energy front within a stable synoptic situation with a high pressure in north and another high pressure to the east.The upper Ievel subtropical jet stream and the lower level jet stream are the dynamic systems supplying the rainstorm with energy,providing the trigger condition for releasing the latent instability energy.and confining the rainstorm to meso-scale. |
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