| 1961～1997年110～140。E垂直经圈环流的年际变化特征及其与海温变化的关系 |
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| 引用本文： | 陈月娟,简俊,张弘,陈新明.1961～1997年110～140。E垂直经圈环流的年际变化特征及其与海温变化的关系[J].大气科学,2001,25(1):79-88. |
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| 作者姓名： | 陈月娟 简俊 张弘 陈新明 |
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| 作者单位： | 1.中国科学技术大学地球与空间科学系,合肥230026 |
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| 基金项目： | 国家重点基础研究发展规划项目G1998040900第一部分、国家自然科学基金资助项目49635170和中国科学院大气物理研究所大气科学与地球流体力学数值模拟国家重点实验室共同资助 |
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| 摘 要： | 用NCEP/NCAR再分析资料，分析了196l～1997各年1月和7月的大气垂直经圈环流的变化特征，特别分析了110～140°E平均的垂直经圈环流和其中的东亚季风环流。计算了各年的经圈环流与多年平均垂直经圈环流之相似系数、差异系数和相对强度。文中除讨论了它们的年际和10年际变化外，还讨论了东亚季风环流强弱变化与ENSO循环的关系。结果表明:(1)垂直经圈环流除有年变化外，存在着较明显的年际和年代际变化。1月的全球平均经圈环流1966～1974年较弱，1976～1987年较强；7月的全球垂直经圈环流则是1963～1974年较强，1986～1995年则相对较弱。(2)110～140°E的平均经圈环流主要特点是:1月东亚季风环流圈代替了北半球的Ferrel环流圈，7月东亚季风环流圈代替了北半球的Hadley环流圈，而且其10年际变化也比较明显。(3)东亚季风环流强弱的变化与ENSO循环有一定的关系。
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| 关 键 词： | 垂直经圈环流 季风环流 ENSO |
| 修稿时间： | 1999年6月29日 |
The Interannual Variability of Meridional Circulation from 1961 to 1997 and Its Relation to SST Anomaly |
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| Chen Yuejuan,Jian Jun,Zhang Hong and Chen Xinming.The Interannual Variability of Meridional Circulation from 1961 to 1997 and Its Relation to SST Anomaly[J].Chinese Journal of Atmospheric Sciences,2001,25(1):79-88. |
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| Authors: | Chen Yuejuan Jian Jun Zhang Hong and Chen Xinming |
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| Abstract: | The variation of the meridional circulation in January and July from 1961 to 1997 has been analyzed by using NCEP/NCAR data. The emphasis was laid on the meridional cell averaged over 110～140°E and the monsoon circulation in East Asia. The calculated normalized correlation, difference and relative intensity between the circulation of each year and the mean circulation are given. Besides the interannual change and decadal change of the circulation, the relationship between the variation of monsoon circulation and ENSO cycle are also discussed. The result shows that: (1) Besides the annual change of vertical meridional circulation, there also exists obviously interannual and decadal changes.The global mean meridional cell in January is weaker from 1966 to 1974 and stronger from 1976 to 1987; but in July it is stronger from 1963 to 1974 and weaker from 1986 to 1995. (2) The main characteristic of the meridional cell averaged over 110~ 140°E is as follows: The monsoon cell in East Asia replaces Ferrel cell in January and Hadley cell in July in the Northern Hemisphere. In addition, its decadal change is very obvious. (3) There exists some relationship between the variation of intensity of the monsoon circulation in East Asian and ENSO cycle. |
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