| 亚洲夏季风环流的低频振荡与江淮梅雨 |
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| 引用本文： | 吴池胜.亚洲夏季风环流的低频振荡与江淮梅雨[J].气象科学,1996,16(4):308-313. |
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| 作者姓名： | 吴池胜 |
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| 作者单位： | 中山大学大气科学系!广州，510275 |
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| 摘 要： | 根据欧洲中心1980～1983年4～9月的200hpa和850hpa格点资料，利用滤波技术和经验正交函数（EOF）分析方法，研究了亚洲地区夏季风环流低频振荡的特征及其对江淮地区梅雨的影响。结果表明：季风环流的低频变化存在三种主要的空间分布型，其中，第一特征向量与江淮地区梅雨期的大尺度环流形势相似，它们的位相转换与季风系统各主要成员的活动密切相关；江淮地区低频气旋性切变线的活动对梅雨期的长短乃至该区的干旱和洪涝有重要的影响。
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| 关 键 词： | 季风环流 低频振荡 梅雨 |
THE RELATIONSHIP BETWEEN LOW FREQUENCY OSCILLATION OF SUMMER MONSOON OVER ASIA AND MEI-YU OVER CHANGJIANGHUAIHE VALLEY |
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| Wu Chisheng.THE RELATIONSHIP BETWEEN LOW FREQUENCY OSCILLATION OF SUMMER MONSOON OVER ASIA AND MEI-YU OVER CHANGJIANGHUAIHE VALLEY[J].Scientia Meteorologica Sinica,1996,16(4):308-313. |
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| Authors: | Wu Chisheng |
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| Abstract: | Based on ECMWF analysed wind data during summer half-year (April-September)in1980 - 1983, the characteristics of low frequency osillation for 850hpa and 200hpa circulationover Asia monsoon region and its effects on the Mei-Yu over Changjiang-Huaihe valley areinvestigated by using Empirical Orthogonal Function (EOF) analysis. The result shows thatthe first three major spatial patterns from the EOF analysis respond to the influence of differ-ent members of monsoon system,respectively. The activity of Jiang-Huai shearing line withlow -frequency at 850hpa is important to the persistence of the Mei - Yu as well as thedrought/flood in the Changjiang-Huaihe vally. |
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| Keywords: | monsoon circulation low frequency osillation Mei-Yu |
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