| Interannual variation of North China rainfall in rainy season and SSTs in the equatorial eastern Pacific |
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| 作者姓名： | LU Riyu |
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| 作者单位： | LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China |
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| 基金项目： | Acknowledgements This study was supported by the Chinese Academy of Sciences （Grant Nos. KZCX3-SW-221 and KZCX3-SW-218） and the National Natural Science Foundation of China （Grant No. 40221503）. |
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| 摘 要： | The rainfall in North China during rainy season （July and August （JA）） exhibits a strong interannual variability. In this study, the atmospheric circulation and SST anomalies associated with the interannual variation of JA North China rainfall are examined. It is found that on the interannual timescale, the JA North China rainfall is associated with significant SST anomalies in the equatorial eastern Pacific, and the North China rainfall and SST anomaly in the equatorial eastern Pacific correspond to the similar variation of the upper-level westerly jet stream over East Asia. A possible mechanism is proposed for the influence of the SST anomalies in the equatorial eastern Pacific on the North China rainfall.
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| 关 键 词： | 中国 北方地区 雨水季节 降雨量 大气循环 |
| 收稿时间： | 2004-06-07 |
| 修稿时间： | 2004-06-072005-02-06 |
Interannual variation of North China rainfall in rainy season and SSTs in the equatorial eastern Pacific |
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| LU Riyu.Interannual variation of North China rainfall in rainy season and SSTs in the equatorial eastern Pacific[J].Chinese Science Bulletin,2005,50(18):2069-2073. |
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| Authors: | Riyu Lu |
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| Institution: | LU Riyu LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences,Beijing 100029, China |
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| Abstract: | The rainfall in North China during rainy sea-son (July and August (JA)) exhibits a strong interannual variability. In this study, the atmospheric circulation and SST anomalies associated with the interannual variation of JA North China rainfall are examined. It is found that on the interannual timescale, the JA North China rainfall is associ-ated with significant SST anomalies in the equatorial eastern Pacific, and the North China rainfall and SST anomaly in the equatorial eastern Pacific correspond to the similar variation of the upper-level westerly jet stream over East Asia. A pos-sible mechanism is proposed for the influence of the SST anomalies in the equatorial eastern Pacific on the North China rainfall. |
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| Keywords: | North China rainfall in rainy season the upper-level westerly jet stream over East Asia interannual variability SSTs in the equatorial eastern Pacific convection over the western Pacific |
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