| 亚澳季风异常与ENSO准四年变化的联系分析 |
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| 作者姓名： | Zhu Yanfeng Chen Longxun |
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| 作者单位： | Zhu YanfengLASG，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029Chen LongxunChinese Academy of Meteorological Sciences，Beijing 100081 |
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| 基金项目： | Acknowledgments. The work was supported by the National Natural Science Foundation of China under GrantNo.49775270. |
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| 摘 要： | 分析了赤道地区纬向风的年际变化特征，以及亚澳季风与ENSO在各个位相的联系。结果表明：赤道纬向风变化与中东太平洋海温变化在准四年周期上是强烈耦合的；在El Eino期间东亚冬季风弱，夏季风强，而南亚夏季风弱，反之，在La Nina期间东亚冬季风强，夏季风弱，而南亚夏季风强；东亚地区的异常北风有利于西太平洋西风异常爆发，使得东太平洋海温升高，但只有随后在中东太平洋出现持续性西风异常，El Nino才能发展，其中来自太平洋中部的异常北风（并不是来自东亚大陆地区）和南太平洋中部的异常南风的辐合对中东太平洋出现持续性西风异常起重要的作用，尤其是澳大利亚东北部的季风异常的影响更为显。
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| 关 键 词： | 亚澳季风 ENSO 准四年振荡 赤道伟向风 厄尔尼诺 年际变化 拉尼娜 |
| 收稿时间： | 23 June 2001 |
The relationship between the asian/ australian monsoon and ENSO on a Quasi-Four-Year Scale |
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| Zhu Yanfeng,Chen Longxun.The relationship between the asian/ australian monsoon and ENSO on a Quasi-Four-Year Scale[J].Advances in Atmospheric Sciences,2002,19(4):727-740. |
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| Authors: | Zhun Yanfeng Chen Longxun |
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| Institution: | LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beifing 100029,Chinese Academy of Meteorological Sciences, Beijing 100081 |
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| Abstract: | The interannual variability of tropical zonal wind and the relationship between ENSO and the Asian/Australian monsoon in different phases are discussed. Results show that the tropical zonal wind strongly couples with the central-eastern Pacific SST on a quasi-four-year scale. During the period of El Nino, the East Asian winter (summer) monsoon is weaker (stronger) and the South Asian summer monsoon is weaker than normal. Conversely, the East Asian winter (summer) monsoon is stronger (weaker) and the South Asian summer monsoon is stronger than normal during the period of La Nina. The anomalous northerly over East Asia induces an anomalous westerly over the western equatorial Pacific, which favors the appearance of positive SST anomalies in the central-eastern Pacific. The development of El Nino requires the persistence of a westerly over the central-eastern Pacific. The convergence between anomalous northerlies from the central North Pacific (not from the East Asian continent) and anomalous southerlies from Northeast Australia favors the persistence of a westerly over the central-eastern Pacific. In particular, the anomalous southerlies from Northeast Australia play a key role in the onset of strong westerly anomalies over the tropical central-eastern Pacific. |
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| Keywords: | Asian / Australian monsoon ENSO quasi-quadrennial oscillation (QQO) tropical zonal wind |
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