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气象:2006,32(2):23-27
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汛期西南低涡移向频数的年际变化与降水
(中国民航飞行学院,四川广汉 618307)
Relationship between Frequency of Moving Direction of Southwest Vortex and Rainfall in Flood Season
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投稿时间:2005-05-31    修订日期:2005-11-25
中文摘要: 利用1960~1999年汛期西南低涡不同移向的数据资料与同期移向相对应站点的降水量进行同步相关分析和检验,并将通过显著水平α=0.05检验的两组资料用墨西哥帽子波进行分析。结果显示:这40年汛期中出现的西南低涡,在原地生消的占总数的一半以上,而能够继续移动发展的西南低涡以偏东路径为主;东北路径的西南低涡与该方向上太原、石家庄降水的相关比较好,偏东路径与汉口降水相关较好,移动总和与内江降水相关较好;从小波分析结果发现东北、偏东路径低涡出现次数与对应站点降水,在10年以上的时间尺度上它们的分布周
Abstract:By using the data of Southwest vortex in Sichuan Basin during June to August from 1960 to 1999, the synchro-correlative analysis is done between the frequence of southwest vortex and the rainfall of these stations.Two groups of the data which have passed the significance level test of α=0.05 are analyzed with Mexican Hat wavelet. The results show that more than half of southwest vortex during June to August in the 40 years occurred and died out in Sichuan Basin, southwest vortex that can move onward chiefly takes the eastern route. The relationship between northeast route ones and the rainfall of Taiyuan, Shijiazhuang, between east vortex and the rainfall of Hankou, and between the sum of the moving of southwest vortex and the rainfall of Neijiang are much better. By the results of wavelet analysis, it is showed that there lies much better corresponding relationship in the frequency distribution between the times of northeast or east-moving vortex and the rainfall of these stations over 10 years of temporal scale.
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基金项目:中国民航飞行学院科研基金(J200436)
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引用文本:
段炼,2006.汛期西南低涡移向频数的年际变化与降水[J].气象,32(2):23-27.
,2006.Relationship between Frequency of Moving Direction of Southwest Vortex and Rainfall in Flood Season[J].Meteor Mon,32(2):23-27.