| ENSO对亚洲夏季风环流和中国夏季降水影响的诊断研究 |
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| 引用本文： | 刘颖,倪允琪.ENSO对亚洲夏季风环流和中国夏季降水影响的诊断研究[J].气象学报,1998,56(6):681-691. |
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| 作者姓名： | 刘颖 倪允琪 |
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| 作者单位： | 南京大学大气科学系 |
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| 摘 要： | 文中以ＳＶＤ分析技术为基础，发展了一种用以提取一个矢量场和一个标量场耦合信号的统计诊断方法——联合ＳＶＤ方法（简记为ＣＳＶＤ），并运用ＣＳＶＤ分析了ＥＮＳＯ对亚洲季风环流系统及中国夏季降水的年际变化的影响。结果表明，在ＥｌＮｉｎｏ年，印度夏季风减弱，东亚夏季风增强；而在ＬａＮｉｎａ年，印度夏季风增强，东亚夏季风减弱。且ＥＮＳＯ对亚洲夏季风环流影响显著的区域主要在长江流域南北气流交汇区和索马里急流区，而对中国夏季降水影响最显著的区域则在江淮流域。
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| 关 键 词： | 联合SVD方法，统计检验，亚洲季风环流，中国夏季降水 |
| 收稿时间： | 1997/3/13 0:00:00 |
| 修稿时间： | 1997/10/26 0:00:00 |
DIAGNOSTIC RESEARCH OF THE EFFECTS OF ENSO ON THE ASIAN SUMMER MONSOON CIRCULATION AND THE SUMMER PRECIPITATION IN CHINA |
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| Liu Ying and Ni Yunqi.DIAGNOSTIC RESEARCH OF THE EFFECTS OF ENSO ON THE ASIAN SUMMER MONSOON CIRCULATION AND THE SUMMER PRECIPITATION IN CHINA[J].Acta Meteorologica Sinica,1998,56(6):681-691. |
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| Authors: | Liu Ying and Ni Yunqi |
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| Institution: | Department of Atmospheric Sciences, Nanjing University, 210093;Department of Atmospheric Sciences, Nanjing University, 210093 |
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| Abstract: | Based on SVD(singular value decomposition), CSVD(combined SVD) used to examine the correlation of a vector field and a scalar field is developed in this paper. With CSVD, the effects of ENSO on the Asian summer monsoon circulation and the summer precipitation in China are examined. The results show that, in an El Nino year, the Indian summer monsoon is subsided, the eastern Asian summer monsoon is strengthened. On the contrary, in a La Nina year, the Indian summer monsoon is enhanced while the eastern Asian summer monsoon is abated. The areas most influenced by the tropical middle east Pacific SSTA mainly lies on the Yangtze river valley the converging area of the north and the south air stream and the Somalia jet area. And the most significantly affected area of ENSO to the summer precipitation in China is the Yangtze and the Huaihe river valley. |
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| Keywords: | CSVD Statistic test Asian summer monsoon circulation Summer precipitation in China |
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