东亚季风的准两年振荡及其与ENSO变率的联系
投稿时间:1997-06-03  修订日期:1997-09-01  点此下载全文
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作者单位
徐建军 南京气象学院气象学系, 南京 210044 
朱乾根 南京气象学院气象学系, 南京 210044 
基金项目:国家自然科学基金
中文摘要:运用小波分析方法和相关分析对东亚季风的准两年振荡(QBO)的存在及其与ENSO变率的关系进行了研究。结果指出:东亚季风具有显着的准两年振荡特征,但周期与振幅具有明显的年代际变化,同时东亚季风的QBO过程与ElNi?o事件具有密切的联系;西太平洋暖池是连接东亚季风与ENSO循环的关键区,由QBO的强冬季风产生遥相关行星波列,在西太平洋暖池首先出现异常,然后暖池异常向东移动,影响到赤道东太平洋,导致ElNi?o事件发生;东亚季风的QBO促使ENSO循环表现出显着的季节锁相,并维持了ENSO事件的一年左右的暖相位。
中文关键词:东亚季风  QBO  ENSO
 
EAST-ASIAN MONSOON QBO AND ITS RELATION TO ENSO VARIABILITY
Abstract:In the context of wavelet technique and coherence analysis the existence of east Asian monsoon QBO is investigated together with its relation to ENSO variability. Results suggest that the monsoon exhibits noticeable QBO but the periods and amplitudes show significant change on an interdecadal basis with the QBO evolution in close relation to an El ?io episode; the western Pacific warm pool serves as a key area connecting the monsoon and ENSO cycle in such a way that the strong QBO winter monsoon first gives rise to a teleconnection wavetrain, followed by anomaly occuring in the warm pool that is then moving eastward, exerting effect on equatorial eastern Pacific SST, causing El ?io happening; the monsoon QBO is responsible for strong seasonal ENSO phase-locking and for its warm phase lasting one year or so.
keywords:east Asian monsoon  QBO  ENSO
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